2A552 CDC Vol 3 H60

1. (408) What type of hydraulic leakage is defined as "Fluid leakage is such that hydraulic reservoir levels may be dangerously lowered or depleted during normal operation, or a fire hazard may be created, or the air worthiness of the helicopter may be otherwise affected"?

Excessive.

Allowable.

Negligible.

Maximum.

Excessive hydraulic leakage is defined as fluid leakage that can dangerously lower or deplete hydraulic reservoir levels during normal operation, create a fire hazard, or otherwise affect the airworthiness of the helicopter. This type of leakage is significant and poses a risk to the safe operation of the hydraulic system.

Explanation

Excessive hydraulic leakage is defined as fluid leakage that can dangerously lower or deplete hydraulic reservoir levels during normal operation, create a fire hazard, or otherwise affect the airworthiness of the helicopter. This type of leakage is significant and poses a risk to the safe operation of the hydraulic system.

2. (427) On an H–60, what screw threaded component's procedures are identified by ** SC **?

Safety Critical.

Sole Component.

Same Component.

Safety Compliance.

The correct answer is "Safety Critical." The procedures identified by ** SC ** on an H-60 refer to safety critical components. These components are crucial for the safe operation of the aircraft and require special attention and procedures to ensure their proper functioning.

Explanation

The correct answer is "Safety Critical." The procedures identified by ** SC ** on an H-60 refer to safety critical components. These components are crucial for the safe operation of the aircraft and require special attention and procedures to ensure their proper functioning.

3. (430) The type of fuel pressure the T700 engine electrical filter bypass sensor senses is

Gage.

Absolute.

Excursion.

Differential.

The T700 engine electrical filter bypass sensor senses the differential fuel pressure. This means that it measures the difference in pressure between the fuel entering the engine and the fuel returning to the fuel tank. This information is important for monitoring the efficiency and performance of the engine's fuel system.

Explanation

The T700 engine electrical filter bypass sensor senses the differential fuel pressure. This means that it measures the difference in pressure between the fuel entering the engine and the fuel returning to the fuel tank. This information is important for monitoring the efficiency and performance of the engine's fuel system.

4. (421) To perform continuity and voltage checks on H–60 electrical systems, you would use

A test light.

A multimeter.

A jumper wire.

An electrodialysis meter.

A multimeter is the most suitable tool for performing continuity and voltage checks on H-60 electrical systems. A test light can only indicate the presence of voltage but cannot measure it accurately. A jumper wire is used to bypass a component temporarily, while an electrodialysis meter is not a commonly used tool for electrical system checks. Therefore, a multimeter, which can measure voltage and check for continuity accurately, is the correct choice for this task.

Explanation

A multimeter is the most suitable tool for performing continuity and voltage checks on H-60 electrical systems. A test light can only indicate the presence of voltage but cannot measure it accurately. A jumper wire is used to bypass a component temporarily, while an electrodialysis meter is not a commonly used tool for electrical system checks. Therefore, a multimeter, which can measure voltage and check for continuity accurately, is the correct choice for this task.

5. (439) What aircraft can the H–60 be air shipped on?

AN–26, MI–17.

C–130, C–5.

C–12, C–123.

C–17, C–5.

The H-60 aircraft can be air shipped on C-17 and C-5 aircraft. These two aircraft are capable of carrying large cargo and have the necessary size and capacity to transport the H-60. The C-17 and C-5 are commonly used for military transport and are designed to handle heavy loads, making them suitable for transporting the H-60.

Explanation

The H-60 aircraft can be air shipped on C-17 and C-5 aircraft. These two aircraft are capable of carrying large cargo and have the necessary size and capacity to transport the H-60. The C-17 and C-5 are commonly used for military transport and are designed to handle heavy loads, making them suitable for transporting the H-60.

6. (409) When the explosive squib is fired, the H–60 CARGO HOOK OPEN light will extinguish when

The hook opens.

The hook closes.

A new squib is installed.

The hook open lever is reset.

When the explosive squib is fired, it causes the hook to open. The H-60 CARGO HOOK OPEN light is illuminated to indicate that the hook is open. However, when a new squib is installed, it means that the old squib has been replaced with a new one. This replacement does not affect the status of the hook, so the H-60 CARGO HOOK OPEN light will extinguish, regardless of whether the hook is open or closed.

Explanation

When the explosive squib is fired, it causes the hook to open. The H-60 CARGO HOOK OPEN light is illuminated to indicate that the hook is open. However, when a new squib is installed, it means that the old squib has been replaced with a new one. This replacement does not affect the status of the hook, so the H-60 CARGO HOOK OPEN light will extinguish, regardless of whether the hook is open or closed.

7. (403) The attachment point for the tail wheel assembly on the H–60 tail landing gear is the

Fork assembly.

Axle assembly.

Yoke assembly.

Shock strut.

The correct answer is the fork assembly. The attachment point for the tail wheel assembly on the H-60 tail landing gear is the fork assembly. This component is responsible for connecting the tail wheel to the rest of the landing gear system. The fork assembly allows for the tail wheel to pivot and move as needed during landing and taxiing operations.

Explanation

The correct answer is the fork assembly. The attachment point for the tail wheel assembly on the H-60 tail landing gear is the fork assembly. This component is responsible for connecting the tail wheel to the rest of the landing gear system. The fork assembly allows for the tail wheel to pivot and move as needed during landing and taxiing operations.

8. (409) The explosive cartridge (squib) on the H–60 cargo hook is used to

Jettison the hook latch.

Separate the hook from the aircraft.

Release the load during normal flight.

Release the load during an emergency.

The explosive cartridge on the H-60 cargo hook is used to release the load during an emergency. This means that in a critical situation, such as a crash or other emergency landing, the explosive cartridge is activated to quickly release the load being carried by the cargo hook. This allows for a safer and faster evacuation of the aircraft.

Explanation

The explosive cartridge on the H-60 cargo hook is used to release the load during an emergency. This means that in a critical situation, such as a crash or other emergency landing, the explosive cartridge is activated to quickly release the load being carried by the cargo hook. This allows for a safer and faster evacuation of the aircraft.

9. (410) To avoid injury and prevent cable fouling when raising or lowering the rescue hoist cable on an H–60, you should use

Rubber gloves and maintain tension on the cable.

Leather gloves and maintain tension on the cable.

Rubber gloves and avoid having tension on the cable.

Leather gloves and avoid having tension on the cable.

Using leather gloves when raising or lowering the rescue hoist cable on an H-60 helicopter is important to avoid injury and prevent cable fouling. Leather gloves provide better grip and protection against abrasion and cuts compared to rubber gloves. Maintaining tension on the cable is also crucial to ensure smooth and controlled movement, reducing the risk of entanglement or accidents. Therefore, using leather gloves and maintaining tension on the cable is the correct approach to ensure safety during hoist operations.

Explanation

Using leather gloves when raising or lowering the rescue hoist cable on an H-60 helicopter is important to avoid injury and prevent cable fouling. Leather gloves provide better grip and protection against abrasion and cuts compared to rubber gloves. Maintaining tension on the cable is also crucial to ensure smooth and controlled movement, reducing the risk of entanglement or accidents. Therefore, using leather gloves and maintaining tension on the cable is the correct approach to ensure safety during hoist operations.

10. (424) A main rotor (MR) blade on an H–60 is allowed to move about its axis for pitch changes by the

Elastomeric bearing.

Hydraulic dampers.

Hub sleeve.

Blade grip.

The main rotor blade on an H-60 is allowed to move about its axis for pitch changes by the elastomeric bearing. The elastomeric bearing is a type of bearing made from a rubber-like material that provides flexibility and allows for movement. In this case, it allows the rotor blade to pivot and change its angle of attack, which is necessary for controlling the helicopter's lift and maneuverability. The hydraulic dampers, hub sleeve, and blade grip are not directly involved in pitch changes and do not provide the necessary flexibility for the blade's movement.

Explanation

The main rotor blade on an H-60 is allowed to move about its axis for pitch changes by the elastomeric bearing. The elastomeric bearing is a type of bearing made from a rubber-like material that provides flexibility and allows for movement. In this case, it allows the rotor blade to pivot and change its angle of attack, which is necessary for controlling the helicopter's lift and maneuverability. The hydraulic dampers, hub sleeve, and blade grip are not directly involved in pitch changes and do not provide the necessary flexibility for the blade's movement.

11. (404) To avoid placing undue stress on the brake assembly when servicing the upper stage of the shock strut, you need to

Deflate the tire.

Set the parking brake.

Release the parking brake.

Use a skid plate under the tire.

When servicing the upper stage of the shock strut, it is important to release the parking brake to avoid placing undue stress on the brake assembly. Releasing the parking brake ensures that the brake is not engaged and eliminates any resistance or tension that may be caused by the brake system. This allows for easier and safer servicing of the shock strut without risking damage to the brake assembly.

Explanation

When servicing the upper stage of the shock strut, it is important to release the parking brake to avoid placing undue stress on the brake assembly. Releasing the parking brake ensures that the brake is not engaged and eliminates any resistance or tension that may be caused by the brake system. This allows for easier and safer servicing of the shock strut without risking damage to the brake assembly.

12. (406) To operationally check the H–60 hydraulic system during ground operations, you use the

Backup hydraulic system.

Utility hydraulic system.

No. 1 hydraulic system.

No. 2 hydraulic system.

To operationally check the H-60 hydraulic system during ground operations, the backup hydraulic system is used.

Explanation

To operationally check the H-60 hydraulic system during ground operations, the backup hydraulic system is used.

13. (410) What is the most likely cause of a birdcaged rescue hoist cable on an H–60?

Hook bearing not rotating freely.

Cable getting caught in the cable guide.

Lifting more weight than the cable is rated for.

Cable rubbing against the other cable or other structural members.

The most likely cause of a birdcaged rescue hoist cable on an H-60 is the hook bearing not rotating freely. When the hook bearing does not rotate freely, it can cause the cable to become twisted and tangled, resulting in a birdcage. This can happen if the bearing is damaged, worn out, or not properly lubricated. When the cable is not able to rotate smoothly, it can lead to a loss of control and potentially dangerous situations during a rescue operation.

Explanation

The most likely cause of a birdcaged rescue hoist cable on an H-60 is the hook bearing not rotating freely. When the hook bearing does not rotate freely, it can cause the cable to become twisted and tangled, resulting in a birdcage. This can happen if the bearing is damaged, worn out, or not properly lubricated. When the cable is not able to rotate smoothly, it can lead to a loss of control and potentially dangerous situations during a rescue operation.

14. (414) Flow of fuel in the H–60 fuel system is directed by the fuel

Flow transmitter.

Management package.

Directional transmitter.

Probe management package.

The correct answer is "management package." The management package in the H-60 fuel system is responsible for directing the flow of fuel. It controls the movement of fuel through the system and ensures that it is distributed properly to the various components and engines. The management package plays a crucial role in maintaining the fuel system's efficiency and functionality.

Explanation

The correct answer is "management package." The management package in the H-60 fuel system is responsible for directing the flow of fuel. It controls the movement of fuel through the system and ensures that it is distributed properly to the various components and engines. The management package plays a crucial role in maintaining the fuel system's efficiency and functionality.

15. (411) On the H–60, the valve type used to mix engine or auxiliary power unit bleed-air with the ambient air to obtain the desired temperature is

Bleed-air mixing.

Engine air mixing.

Bleed-air regulating.

Engine air regulating.

On the H-60, the valve type used to mix engine or auxiliary power unit bleed-air with the ambient air to obtain the desired temperature is called "bleed-air mixing." This valve is responsible for regulating the flow of bleed-air from the engine or auxiliary power unit and mixing it with the ambient air to achieve the desired temperature before it is distributed throughout the aircraft.

Explanation

On the H-60, the valve type used to mix engine or auxiliary power unit bleed-air with the ambient air to obtain the desired temperature is called "bleed-air mixing." This valve is responsible for regulating the flow of bleed-air from the engine or auxiliary power unit and mixing it with the ambient air to achieve the desired temperature before it is distributed throughout the aircraft.

16. (415) On the H–60, fuel will automatically transfer when

One main fuel tank is at 887 pounds and the other is at less than 1,000 pounds.

Both auxiliary fuel tank levels are less than 800 pounds.

Both main fuel tank levels are more than 1,050 pounds.

Both auxiliary fuel tanks are empty.

When one main fuel tank is at 887 pounds and the other is at less than 1,000 pounds, fuel will automatically transfer on the H-60.

Explanation

When one main fuel tank is at 887 pounds and the other is at less than 1,000 pounds, fuel will automatically transfer on the H-60.

17. (424) When an H–60 damper and reservoir are fully serviced, the indicator will show full

Red.

Blue.

Gold.

Yellow.

When an H-60 damper and reservoir are fully serviced, the indicator will show gold. This is because gold is commonly used to represent the "full" or "maximum" level in various indicators and gauges. In this case, the gold color indicates that the damper and reservoir have been completely serviced and are at their optimal level.

Explanation

When an H-60 damper and reservoir are fully serviced, the indicator will show gold. This is because gold is commonly used to represent the "full" or "maximum" level in various indicators and gauges. In this case, the gold color indicates that the damper and reservoir have been completely serviced and are at their optimal level.

18. (438) What is indicated if the red fire extinguisher thermal discharge indicator is missing?

Auxiliary power unit (APU) fire bottle has discharged.

Fire extinguisher bypass filter requires replacement.

One or both fire bottles have discharged.

Fire detector requires replacement.

If the red fire extinguisher thermal discharge indicator is missing, it indicates that one or both fire bottles have discharged. The thermal discharge indicator is a device that shows whether the fire extinguisher has been discharged due to excessive heat. Therefore, if the indicator is missing, it suggests that the fire extinguisher has been used and needs to be replaced.

Explanation

If the red fire extinguisher thermal discharge indicator is missing, it indicates that one or both fire bottles have discharged. The thermal discharge indicator is a device that shows whether the fire extinguisher has been discharged due to excessive heat. Therefore, if the indicator is missing, it suggests that the fire extinguisher has been used and needs to be replaced.

19. (402) The roll vibration absorbers on the H–60 are installed under the

Main landing gear drag beam support fairings.

Tail and main landing gear drag beam.

Main landing gear drag beam only.

Tail landing gear drag beam only.

The roll vibration absorbers on the H-60 are installed under the main landing gear drag beam support fairings. This means that the absorbers are located in a specific area, namely under the support fairings of the main landing gear drag beam. This placement helps to reduce roll vibrations, providing stability and smoother operation during flight.

Explanation

The roll vibration absorbers on the H-60 are installed under the main landing gear drag beam support fairings. This means that the absorbers are located in a specific area, namely under the support fairings of the main landing gear drag beam. This placement helps to reduce roll vibrations, providing stability and smoother operation during flight.

20. (428) The T700 engine module that extracts most of the energy from the exhaust gases for output power is the

Hot section.

Cold section.

Power turbine.

Accessory gearbox.

The power turbine is the T700 engine module that extracts most of the energy from the exhaust gases for output power. This turbine is responsible for converting the high-pressure, high-temperature gases into mechanical energy, which is then used to drive the rotor system and generate power. The hot section and cold section are other components of the engine that play different roles in the overall functioning, but it is the power turbine that specifically extracts the energy from the exhaust gases. The accessory gearbox, on the other hand, is responsible for transmitting power to various engine accessories and does not directly extract energy from the exhaust gases.

Explanation

The power turbine is the T700 engine module that extracts most of the energy from the exhaust gases for output power. This turbine is responsible for converting the high-pressure, high-temperature gases into mechanical energy, which is then used to drive the rotor system and generate power. The hot section and cold section are other components of the engine that play different roles in the overall functioning, but it is the power turbine that specifically extracts the energy from the exhaust gases. The accessory gearbox, on the other hand, is responsible for transmitting power to various engine accessories and does not directly extract energy from the exhaust gases.

21. (430) The internal bypass flow in the T700 fuel boost pump provides approximately

Twice the minimum fuel-flow.

Twice the maximum fuel-flow.

Triple the minimum fuel-flow.

Triple the maximum fuel-flow.

The internal bypass flow in the T700 fuel boost pump provides approximately twice the maximum fuel-flow. This means that the pump is capable of delivering fuel at a rate that is double the maximum flow rate required by the engine. The bypass flow allows for excess fuel to be diverted back to the fuel tank, ensuring that the engine receives a steady and consistent fuel supply.

Explanation

The internal bypass flow in the T700 fuel boost pump provides approximately twice the maximum fuel-flow. This means that the pump is capable of delivering fuel at a rate that is double the maximum flow rate required by the engine. The bypass flow allows for excess fuel to be diverted back to the fuel tank, ensuring that the engine receives a steady and consistent fuel supply.

22. (416) When the H–60 refuel probe is extended, the fuel from the retract side of the probe flows to the

No. 1 main fuel tank.

No. 2 main fuel tank.

Internal auxiliary fuel tank.

External auxiliary fuel tank.

When the H-60 refuel probe is extended, the fuel from the retract side of the probe flows to the No. 2 main fuel tank.

Explanation

When the H-60 refuel probe is extended, the fuel from the retract side of the probe flows to the No. 2 main fuel tank.

23. (414) The type of self-sealing valves installed in the H–60 fuel lines to contain the fuel in case of a helicopter crash or malfunction is

Inertia.

Impact.

Shutoff.

Breakaway.

Breakaway valves are installed in H-60 fuel lines to contain the fuel in case of a helicopter crash or malfunction. These valves are designed to separate or break away from the fuel line when a certain force or pressure is applied. This helps prevent fuel leakage and potential fires or explosions in the event of an accident. The breakaway feature allows the valves to disconnect and seal off the fuel flow, ensuring the safety of the helicopter and its occupants.

Explanation

Breakaway valves are installed in H-60 fuel lines to contain the fuel in case of a helicopter crash or malfunction. These valves are designed to separate or break away from the fuel line when a certain force or pressure is applied. This helps prevent fuel leakage and potential fires or explosions in the event of an accident. The breakaway feature allows the valves to disconnect and seal off the fuel flow, ensuring the safety of the helicopter and its occupants.

24. (417) The item used as the dielectric in the H–60 fuel quantify indicating system is

Alternating current (AC) current.

Direct current (DC) current.

Fuel.

Air.

The correct answer is fuel. The H-60 fuel quantity indicating system requires a dielectric material to measure the fuel level. A dielectric is an insulating material that can store electrical energy. In this case, the fuel itself acts as the dielectric, allowing the system to measure the level of fuel based on its capacitance. Alternating current (AC) and direct current (DC) currents are not used as dielectric materials. Air is also not used as the dielectric in this system.

Explanation

The correct answer is fuel. The H-60 fuel quantity indicating system requires a dielectric material to measure the fuel level. A dielectric is an insulating material that can store electrical energy. In this case, the fuel itself acts as the dielectric, allowing the system to measure the level of fuel based on its capacitance. Alternating current (AC) and direct current (DC) currents are not used as dielectric materials. Air is also not used as the dielectric in this system.

25. (427) You are performing a tail rotor (TR) rig on an H–60. To do this properly you must have a bias of

3 degrees.

3 minutes.

9 degrees.

9 minutes.

The correct answer is 3 degrees. In a tail rotor (TR) rig on an H-60 helicopter, a bias of 3 degrees is required. This means that the tail rotor blades must be adjusted to have a 3-degree angle relative to the helicopter's longitudinal axis. This adjustment is necessary to ensure proper balance and performance of the helicopter during flight.

Explanation

The correct answer is 3 degrees. In a tail rotor (TR) rig on an H-60 helicopter, a bias of 3 degrees is required. This means that the tail rotor blades must be adjusted to have a 3-degree angle relative to the helicopter's longitudinal axis. This adjustment is necessary to ensure proper balance and performance of the helicopter during flight.

26. (436) If the main transmission on an H–60 suffers a total oil loss, it can operate at cruise for

5 minutes.

15 minutes.

30 minutes.

45 minutes.

The correct answer is 30 minutes. In the event of a total oil loss in the main transmission of an H-60 helicopter, it can continue to operate at cruise speed for approximately 30 minutes. After this time, the lack of lubrication and cooling from the oil would likely cause significant damage to the transmission, resulting in a loss of power and potential failure. Therefore, it is crucial to address the oil loss issue as soon as possible to prevent further damage and ensure the safety of the aircraft and its occupants.

Explanation

The correct answer is 30 minutes. In the event of a total oil loss in the main transmission of an H-60 helicopter, it can continue to operate at cruise speed for approximately 30 minutes. After this time, the lack of lubrication and cooling from the oil would likely cause significant damage to the transmission, resulting in a loss of power and potential failure. Therefore, it is crucial to address the oil loss issue as soon as possible to prevent further damage and ensure the safety of the aircraft and its occupants.

27. (418) In comparison to other aircraft systems, troubleshooting the fuel system is more difficult because

The fuel system is more complex.

You must work with a team of mechanics.

The mechanical components are hard to access.

Schematics in the technical orders are hard to interpret.

The correct answer is that the mechanical components are hard to access. This suggests that the difficulty in troubleshooting the fuel system is due to the challenge of physically reaching and examining the mechanical components of the system. This could be because they are located in tight or hard-to-reach spaces, requiring additional time and effort to access and inspect.

Explanation

The correct answer is that the mechanical components are hard to access. This suggests that the difficulty in troubleshooting the fuel system is due to the challenge of physically reaching and examining the mechanical components of the system. This could be because they are located in tight or hard-to-reach spaces, requiring additional time and effort to access and inspect.

28. (426) Longitudinal movement of the H–60 helicopter is accomplished by movement of the

Cyclic control.

Stabilator control.

Collective control.

Tail rotor (TR) control.

The correct answer is cyclic control. The cyclic control is a mechanism in a helicopter that allows the pilot to control the pitch and roll of the aircraft. By moving the cyclic control, the pilot can tilt the rotor disc in a specific direction, which creates a different amount of lift on each side of the rotor. This imbalance in lift causes the helicopter to tilt in the desired direction, resulting in longitudinal movement. The stabilator control is responsible for controlling the pitch of the stabilator, the collective control is used to control the overall lift of the helicopter, and the tail rotor control is used to counteract the torque produced by the main rotor.

Explanation

The correct answer is cyclic control. The cyclic control is a mechanism in a helicopter that allows the pilot to control the pitch and roll of the aircraft. By moving the cyclic control, the pilot can tilt the rotor disc in a specific direction, which creates a different amount of lift on each side of the rotor. This imbalance in lift causes the helicopter to tilt in the desired direction, resulting in longitudinal movement. The stabilator control is responsible for controlling the pitch of the stabilator, the collective control is used to control the overall lift of the helicopter, and the tail rotor control is used to counteract the torque produced by the main rotor.

29. (409) The release mode that is not applicable to the H–60 cargo hook is

Emergency.

Standard.

Manual.

Normal.

The H-60 cargo hook does not have a standard release mode. This means that the standard release mode is not applicable to the H-60 cargo hook.

Explanation

The H-60 cargo hook does not have a standard release mode. This means that the standard release mode is not applicable to the H-60 cargo hook.

30. (421) What electrical check would you use to determine the amount of resistance (ohms) in a particular wire or component on an H–60?

Probe.

Ground.

Voltage.

Continuity.

Continuity testing is used to determine if there is a complete path for current flow in a wire or component. It checks for any breaks or gaps in the circuit, indicating a high resistance or an open circuit. By using a continuity test, one can verify if the wire or component has the desired amount of resistance (ohms) or if there is any interruption in the flow of current. Therefore, continuity is the appropriate electrical check to determine the amount of resistance in a particular wire or component on an H-60.

Explanation

Continuity testing is used to determine if there is a complete path for current flow in a wire or component. It checks for any breaks or gaps in the circuit, indicating a high resistance or an open circuit. By using a continuity test, one can verify if the wire or component has the desired amount of resistance (ohms) or if there is any interruption in the flow of current. Therefore, continuity is the appropriate electrical check to determine the amount of resistance in a particular wire or component on an H-60.

31. (435) If you find it is difficult to pull the input module free from the main module when removing the input module from an H–60 power train, you can help break the input module loose using

Bolts.

A screwdriver.

A large wooden mallet.

The hydraulic separator unit.

When removing the input module from an H-60 power train, if it is difficult to pull it free from the main module, using bolts can help break the input module loose. This suggests that applying force with bolts can help loosen the input module and make it easier to remove.

Explanation

When removing the input module from an H-60 power train, if it is difficult to pull it free from the main module, using bolts can help break the input module loose. This suggests that applying force with bolts can help loosen the input module and make it easier to remove.

32. (402) Following installation, the H–60 vibration absorber that requires a tuning weight adjustment using the 8500 Balancer/Analyzer and functional check flight is the

Stabilator.

Cabin.

Roll.

Tail.

The correct answer is cabin. After the installation of the H-60 vibration absorber, a tuning weight adjustment is required using the 8500 Balancer/Analyzer and a functional check flight. The stabilator, roll, and tail are not mentioned in relation to this process. Therefore, the cabin is the correct answer.

Explanation

The correct answer is cabin. After the installation of the H-60 vibration absorber, a tuning weight adjustment is required using the 8500 Balancer/Analyzer and a functional check flight. The stabilator, roll, and tail are not mentioned in relation to this process. Therefore, the cabin is the correct answer.

33. (403) What allows for thermal expansion when the brakes on an H–60 are OFF?

Master cylinder.

Slave mixer valve.

Parking brake valve.

Wheel brake assembly.

The master cylinder allows for thermal expansion when the brakes on an H-60 are OFF. The master cylinder is responsible for generating hydraulic pressure that is used to activate the wheel brakes. When the brakes are not in use, the master cylinder compensates for thermal expansion by allowing the hydraulic fluid to expand and contract without causing any damage to the braking system.

Explanation

The master cylinder allows for thermal expansion when the brakes on an H-60 are OFF. The master cylinder is responsible for generating hydraulic pressure that is used to activate the wheel brakes. When the brakes are not in use, the master cylinder compensates for thermal expansion by allowing the hydraulic fluid to expand and contract without causing any damage to the braking system.

34. (404) Before servicing an H–60 landing gear strut with nitrogen, you must ensure there

Are no nitrogen leaks.

Are no hydraulic fluid leaks.

Is adequate nitrogen pressure.

Is proper hydraulic fluid pressure.

Before servicing an H-60 landing gear strut with nitrogen, it is important to ensure that there are no hydraulic fluid leaks. This is because if there are leaks in the hydraulic fluid system, it can lead to a loss of hydraulic pressure and potentially affect the performance and safety of the landing gear. Therefore, checking for hydraulic fluid leaks is crucial before proceeding with servicing the landing gear strut with nitrogen.

Explanation

Before servicing an H-60 landing gear strut with nitrogen, it is important to ensure that there are no hydraulic fluid leaks. This is because if there are leaks in the hydraulic fluid system, it can lead to a loss of hydraulic pressure and potentially affect the performance and safety of the landing gear. Therefore, checking for hydraulic fluid leaks is crucial before proceeding with servicing the landing gear strut with nitrogen.

35. (409) The capacity of the cargo hook on the H–60 is

4,000 pounds.

6,000 pounds.

8,000 pounds.

10,000 pounds.

The correct answer is 8,000 pounds. This indicates that the capacity of the cargo hook on the H-60 helicopter is 8,000 pounds.

Explanation

The correct answer is 8,000 pounds. This indicates that the capacity of the cargo hook on the H-60 helicopter is 8,000 pounds.

36. (413) The windshield anti-ice system heating elements on the H–60 will heat the windshield surface to a temperature of

70 – 115F.

90 – 150F.

70 – 115C.

70 – 150C.

The correct answer is 70 - 115°F. This is the temperature range at which the windshield anti-ice system heating elements on the H-60 will heat the windshield surface. It is important to maintain this temperature range to prevent ice buildup on the windshield, which could obstruct the pilot's view and compromise flight safety.

Explanation

The correct answer is 70 - 115°F. This is the temperature range at which the windshield anti-ice system heating elements on the H-60 will heat the windshield surface. It is important to maintain this temperature range to prevent ice buildup on the windshield, which could obstruct the pilot's view and compromise flight safety.

37. (417) If, on an H–60 fuel system, you want to remove 28 volts direct current (VDC) power, deenergize the fuel warning conditioner relays, and cause the No. 1 and No. 2 FUEL LOW capsules to illuminate, you would press the FUEL

TEST reset button on the central display unit (CDU).

IND TEST push-button on the miscellaneous switch panel.

SYS TEST push-button on the miscellaneous switch panel.

PROBE TEST push-button on the miscellaneous switch panel.

Pressing the IND TEST push-button on the miscellaneous switch panel would deenergize the fuel warning conditioner relays and cause the No. 1 and No. 2 FUEL LOW capsules to illuminate. This action would not remove 28 volts direct current (VDC) power, but it would initiate the fuel system test and activate the fuel warning indicators.

Explanation

Pressing the IND TEST push-button on the miscellaneous switch panel would deenergize the fuel warning conditioner relays and cause the No. 1 and No. 2 FUEL LOW capsules to illuminate. This action would not remove 28 volts direct current (VDC) power, but it would initiate the fuel system test and activate the fuel warning indicators.

38. (421) Before performing an H–60 electrical continuity check, you must remove all power from the circuit you are checking. Failure to do this could result in damage to the

#1 bus.

#2 bus.

Circuit.

Multimeter.

Before performing an H-60 electrical continuity check, it is necessary to remove all power from the circuit being checked. Failure to do so could result in damage to the multimeter.

Explanation

Before performing an H-60 electrical continuity check, it is necessary to remove all power from the circuit being checked. Failure to do so could result in damage to the multimeter.

39. (425) Vibration is best defined as the periodic back and forth movement of a component caused by

Unbalance or external forces.

Unbalance or internal forces.

Vibration or external forces.

Balance or internal forces.

Vibration is defined as the periodic back and forth movement of a component. This movement can be caused by either unbalance or external forces acting on the component. Unbalance refers to an uneven distribution of mass within the component, causing it to vibrate. External forces, on the other hand, can include any external factors such as mechanical shocks or vibrations that are transmitted to the component. Therefore, the correct answer is unbalance or external forces.

Explanation

Vibration is defined as the periodic back and forth movement of a component. This movement can be caused by either unbalance or external forces acting on the component. Unbalance refers to an uneven distribution of mass within the component, causing it to vibrate. External forces, on the other hand, can include any external factors such as mechanical shocks or vibrations that are transmitted to the component. Therefore, the correct answer is unbalance or external forces.

40. (427) You are troubleshooting the directional control pedals on an H–60 and the problem still persists. Your next course of action will be to

Perform a main rotor rig.

Conduct a four point rig.

Perform a tail rotor rig check.

Conduct a quick rig of the tail rotor system.

Performing a tail rotor rig check would be the next course of action because the problem with the directional control pedals on the H-60 still persists. A tail rotor rig check involves ensuring that the tail rotor system is properly aligned and adjusted. This check can help identify any issues with the tail rotor system that may be causing the problem with the directional control pedals. By performing this check, any misalignments or adjustments can be corrected, potentially resolving the issue with the pedals.

Explanation

Performing a tail rotor rig check would be the next course of action because the problem with the directional control pedals on the H-60 still persists. A tail rotor rig check involves ensuring that the tail rotor system is properly aligned and adjusted. This check can help identify any issues with the tail rotor system that may be causing the problem with the directional control pedals. By performing this check, any misalignments or adjustments can be corrected, potentially resolving the issue with the pedals.

41. (405) Before you apply external electrical power to perform an operational check of an H–60's brake system, you must first check the clearance around the

Tail rotor (TR) blades.

Main rotor blades.

Brake liners.

Stabilator.

Before applying external electrical power to perform an operational check of an H-60's brake system, it is necessary to first check the clearance around the stabilator. The stabilator is the horizontal stabilizer located at the tail of the aircraft. Ensuring proper clearance around the stabilator is important to prevent any damage to the aircraft or injury to personnel during the operational check of the brake system.

Explanation

Before applying external electrical power to perform an operational check of an H-60's brake system, it is necessary to first check the clearance around the stabilator. The stabilator is the horizontal stabilizer located at the tail of the aircraft. Ensuring proper clearance around the stabilator is important to prevent any damage to the aircraft or injury to personnel during the operational check of the brake system.

42. (415) The amount of useable fuel the H–60 internal auxiliary fuel tank will hold if it is single point refueled is

120 gallons.

130 gallons.

150 gallons.

170 gallons.

The correct answer is 170 gallons. This is because the question states that the H-60 internal auxiliary fuel tank is single point refueled, which means that it can hold a larger amount of fuel compared to other refueling methods. Therefore, the tank will hold 170 gallons of useable fuel.

Explanation

The correct answer is 170 gallons. This is because the question states that the H-60 internal auxiliary fuel tank is single point refueled, which means that it can hold a larger amount of fuel compared to other refueling methods. Therefore, the tank will hold 170 gallons of useable fuel.

43. (421) The pin filter adapters in the H–60 alternating current (AC) electrical system are designed to filter

Electromagnetic vibrations.

Electromagnetic pulses.

Electrical impulses.

Magnetic pulses.

The pin filter adapters in the H-60 AC electrical system are specifically designed to filter out electromagnetic pulses. Electromagnetic pulses are sudden bursts of electromagnetic energy that can disrupt or damage electrical equipment. By using pin filter adapters, the system can effectively block or reduce the impact of these pulses, ensuring the smooth and safe operation of the electrical system.

Explanation

The pin filter adapters in the H-60 AC electrical system are specifically designed to filter out electromagnetic pulses. Electromagnetic pulses are sudden bursts of electromagnetic energy that can disrupt or damage electrical equipment. By using pin filter adapters, the system can effectively block or reduce the impact of these pulses, ensuring the smooth and safe operation of the electrical system.

44. (424) When the H–60 main rotor (MR) is rotating, centrifugal force will throw the droop stops out and permit increased vertical movement of the blades when the rotation percentage MR speed (Nr) is

85 to 90 percent.

70 to 75 percent.

55 to 60 percent.

40 to 45 percent.

When the H-60 main rotor is rotating at 70 to 75 percent of its speed (Nr), centrifugal force will throw the droop stops out. This action allows for increased vertical movement of the blades.

Explanation

When the H-60 main rotor is rotating at 70 to 75 percent of its speed (Nr), centrifugal force will throw the droop stops out. This action allows for increased vertical movement of the blades.

45. (401) What section of the H–60 is designed to give a smooth airflow induction for cooling major aircraft systems and subsystem components?

Stabilator.

Tail rotor pylon.

Main rotor pylon.

Transition section.

The main rotor pylon is designed to give a smooth airflow induction for cooling major aircraft systems and subsystem components. This section of the H-60 is responsible for directing the airflow in a way that efficiently cools the critical components of the aircraft. The stabilator, tail rotor pylon, and transition section do not have the same function of providing airflow induction for cooling purposes.

Explanation

The main rotor pylon is designed to give a smooth airflow induction for cooling major aircraft systems and subsystem components. This section of the H-60 is responsible for directing the airflow in a way that efficiently cools the critical components of the aircraft. The stabilator, tail rotor pylon, and transition section do not have the same function of providing airflow induction for cooling purposes.

46. (402) The H–60 stabilator vibration absorber is attached to the

Left stabilator keeper pin.

Right stabilator keeper pin.

Left stabilator attachment fitting.

Right stabilator attachment fitting.

The H-60 stabilator vibration absorber is attached to the right stabilator attachment fitting. This means that it is connected to the right side of the stabilator, which is the horizontal stabilizer on the tail of the aircraft. The attachment fitting is the point where the absorber is connected to the stabilator, allowing it to absorb and reduce vibrations during flight.

Explanation

The H-60 stabilator vibration absorber is attached to the right stabilator attachment fitting. This means that it is connected to the right side of the stabilator, which is the horizontal stabilizer on the tail of the aircraft. The attachment fitting is the point where the absorber is connected to the stabilator, allowing it to absorb and reduce vibrations during flight.

47. (421) What power source backs up the No. 1 and No. 2 generators on the H–60?

Auxiliary power unit (APU) generator.

Backup power unit.

Backup generator.

Battery.

The correct answer is the Auxiliary power unit (APU) generator. The APU generator serves as a backup power source for the No. 1 and No. 2 generators on the H-60. The APU is a small gas turbine engine that provides electrical power to the aircraft when the main engines are not running. It is designed to start the main engines, provide electrical power during ground operations, and act as a backup power source in case of generator failure.

Explanation

The correct answer is the Auxiliary power unit (APU) generator. The APU generator serves as a backup power source for the No. 1 and No. 2 generators on the H-60. The APU is a small gas turbine engine that provides electrical power to the aircraft when the main engines are not running. It is designed to start the main engines, provide electrical power during ground operations, and act as a backup power source in case of generator failure.

48. (424) The H–60 pilot is alerted to a de-ice system malfunction by a

De-ice caution light.

De-ice fail caution light.

De-ice caution light and horn.

FAIL flag on the ice-rate meter.

The correct answer is "FAIL flag on the ice-rate meter." This means that when there is a de-ice system malfunction, the pilot will be alerted by a FAIL flag on the ice-rate meter. This flag indicates that the de-ice system has failed and requires attention. It is a visual indicator that provides a clear and immediate indication of the malfunction, allowing the pilot to take appropriate action. The other options, such as the de-ice caution light, de-ice fail caution light, and de-ice caution light and horn, are not specifically mentioned as indicators of a de-ice system malfunction in the given information.

Explanation

The correct answer is "FAIL flag on the ice-rate meter." This means that when there is a de-ice system malfunction, the pilot will be alerted by a FAIL flag on the ice-rate meter. This flag indicates that the de-ice system has failed and requires attention. It is a visual indicator that provides a clear and immediate indication of the malfunction, allowing the pilot to take appropriate action. The other options, such as the de-ice caution light, de-ice fail caution light, and de-ice caution light and horn, are not specifically mentioned as indicators of a de-ice system malfunction in the given information.

49. (406) When the No. 1 hydraulic system on an H–60 fails, the pressure switch that will send a signal to the logic module is located in the

Forward primary servo.

Transfer module pump.

Second-stage servo.

Transfer module.

When the No. 1 hydraulic system on an H-60 fails, the pressure switch that will send a signal to the logic module is located in the transfer module.

Explanation

When the No. 1 hydraulic system on an H-60 fails, the pressure switch that will send a signal to the logic module is located in the transfer module.

50. (416) The amount of fuel that should remain in the main tanks of an H–60 after the fuel dump pumps shut off is

152 pounds.

172 pounds.

192 pounds.

202 pounds.

After the fuel dump pumps shut off in an H-60 helicopter, there should be 172 pounds of fuel remaining in the main tanks.

Explanation

After the fuel dump pumps shut off in an H-60 helicopter, there should be 172 pounds of fuel remaining in the main tanks.

51. (427) During an H–60 main rotor rig check, the item you use to inspect all safety critical parts is

Dye penetrate.

An ultraviolet light.

A 10-power magnifying glass.

A flashlight and inspection mirror.

During an H-60 main rotor rig check, a 10-power magnifying glass is used to inspect all safety critical parts. This tool allows for a closer examination of the parts, enabling any potential defects or damages to be identified more easily. The magnifying glass provides a higher level of detail and precision compared to other options such as dye penetrate, an ultraviolet light, or a flashlight and inspection mirror.

Explanation

During an H-60 main rotor rig check, a 10-power magnifying glass is used to inspect all safety critical parts. This tool allows for a closer examination of the parts, enabling any potential defects or damages to be identified more easily. The magnifying glass provides a higher level of detail and precision compared to other options such as dye penetrate, an ultraviolet light, or a flashlight and inspection mirror.

52. (419) The generator kilovolt amperage rating of the auxiliary power unit on the H–60 is

5/10.

10/20.

20/30.

25/35.

The correct answer is 20/30 because it is the only option that falls within a reasonable range for the kilovolt amperage rating of a generator. A rating of 5/10 or 10/20 would be too low, and a rating of 25/35 would be too high. Therefore, 20/30 is the most likely and reasonable option.

Explanation

The correct answer is 20/30 because it is the only option that falls within a reasonable range for the kilovolt amperage rating of a generator. A rating of 5/10 or 10/20 would be too low, and a rating of 25/35 would be too high. Therefore, 20/30 is the most likely and reasonable option.

53. (422) The indicator range of the barometric altimeters on the H–60 is between

1,000 to 50,000 ft.

2,000 to 50,000 ft.

5,000 to 50,000 ft.

50,000 to 100,000 ft.

The correct answer is 1,000 to 50,000 ft. This means that the barometric altimeters on the H-60 have a range of measurement from 1,000 feet to 50,000 feet. This range allows the altimeters to accurately display the altitude of the aircraft within this range.

Explanation

The correct answer is 1,000 to 50,000 ft. This means that the barometric altimeters on the H-60 have a range of measurement from 1,000 feet to 50,000 feet. This range allows the altimeters to accurately display the altitude of the aircraft within this range.

54. (425) The most probable cause of a low-frequency vibration is

A defective drive shaft.

An oil cooler out-of-line.

A damaged or out-of-balance main rotor (MR).

An out-of-balance auxiliary power unit (APU) driveshaft.

A low-frequency vibration is most likely caused by a damaged or out-of-balance main rotor (MR). The main rotor is a crucial component of a helicopter and any damage or imbalance in it can result in vibrations at lower frequencies. These vibrations can be felt throughout the aircraft and can affect its performance and stability. Therefore, if a low-frequency vibration is experienced, it is highly likely that the main rotor is damaged or out-of-balance.

Explanation

A low-frequency vibration is most likely caused by a damaged or out-of-balance main rotor (MR). The main rotor is a crucial component of a helicopter and any damage or imbalance in it can result in vibrations at lower frequencies. These vibrations can be felt throughout the aircraft and can affect its performance and stability. Therefore, if a low-frequency vibration is experienced, it is highly likely that the main rotor is damaged or out-of-balance.

55. (425) What type of vibration frequency would an out-of-balance H–60 tail rotor drive shaft cause?

1 per rev.

Medium.

High

Low

An out-of-balance H-60 tail rotor drive shaft would cause a medium vibration frequency. When a rotating component like the tail rotor drive shaft is out of balance, it creates an uneven distribution of mass, causing the shaft to vibrate. The frequency of this vibration would be medium, indicating that it is neither too low nor too high. This vibration frequency can be harmful to the helicopter's performance and stability, so it is important to address and correct any balance issues in the drive shaft.

Explanation

An out-of-balance H-60 tail rotor drive shaft would cause a medium vibration frequency. When a rotating component like the tail rotor drive shaft is out of balance, it creates an uneven distribution of mass, causing the shaft to vibrate. The frequency of this vibration would be medium, indicating that it is neither too low nor too high. This vibration frequency can be harmful to the helicopter's performance and stability, so it is important to address and correct any balance issues in the drive shaft.

56. (426) The H–60 cyclic stick feature that allows the pilot to slew the stabilator trailing edge up without letting go of the stick is a(n)

Automatic slew-up switch.

Manual slew-up switch.

Automatic trim switch.

Manual trim switch.

The correct answer is manual slew-up switch. This is because the feature described in the question allows the pilot to slew the stabilator trailing edge up without letting go of the stick. The term "manual" indicates that the pilot has control over this action, rather than it being done automatically. Therefore, the correct answer is manual slew-up switch.

Explanation

The correct answer is manual slew-up switch. This is because the feature described in the question allows the pilot to slew the stabilator trailing edge up without letting go of the stick. The term "manual" indicates that the pilot has control over this action, rather than it being done automatically. Therefore, the correct answer is manual slew-up switch.

57. (423) To check the H–60 central display unit (CDU) dimming feature, you would use

A test unit.

A flashlight.

The test switch.

The rheostat knob.

To check the H-60 central display unit (CDU) dimming feature, you would use a flashlight. This is because a flashlight can be used to illuminate the CDU and observe if the dimming feature is working properly. By shining the flashlight on the CDU, you can determine if the display dims or brightens accordingly. A test unit, test switch, or rheostat knob are not suitable for this task as they do not directly involve the visual inspection of the CDU's dimming feature.

Explanation

To check the H-60 central display unit (CDU) dimming feature, you would use a flashlight. This is because a flashlight can be used to illuminate the CDU and observe if the dimming feature is working properly. By shining the flashlight on the CDU, you can determine if the display dims or brightens accordingly. A test unit, test switch, or rheostat knob are not suitable for this task as they do not directly involve the visual inspection of the CDU's dimming feature.

58. (425) High-frequency vibrations on the H–60 helicopter normally come from

A damaged main rotor (MR) blade.

An out-of-tune vibration absorber.

A damaged main module.

Worn bifilar weights.

The high-frequency vibrations on the H-60 helicopter are typically caused by a damaged main module. This could refer to any component within the main module that has been compromised or is not functioning properly. It is important to address and repair this issue to ensure the helicopter's stability and safety during flight.

Explanation

The high-frequency vibrations on the H-60 helicopter are typically caused by a damaged main module. This could refer to any component within the main module that has been compromised or is not functioning properly. It is important to address and repair this issue to ensure the helicopter's stability and safety during flight.

59. (439) What TO should you consult for loading and offloading your helicopter on a transport aircraft?

1H–1–39.

1C–17A–9.

1H–60(H)G–2–9.

The –9 TO of the aircraft you are using for transport.

The correct answer is "The –9 TO of the aircraft you are using for transport." This answer suggests that you should consult the -9 Technical Order (TO) of the specific aircraft you are using for transport. This TO would provide the necessary guidance and instructions for loading and offloading your helicopter on the transport aircraft.

Explanation

The correct answer is "The –9 TO of the aircraft you are using for transport." This answer suggests that you should consult the -9 Technical Order (TO) of the specific aircraft you are using for transport. This TO would provide the necessary guidance and instructions for loading and offloading your helicopter on the transport aircraft.

60. (410) The hydraulic fluid for the H–60 rescue hoist is cooled by

The air-to-oil heat exchanger.

The honeycomb cooling core.

A continuously running heat exchanger fan.

A thermostatic-controlled heat exchanger fan.

The hydraulic fluid for the H-60 rescue hoist is cooled by a continuously running heat exchanger fan. This means that the fan is always running, providing a constant flow of air to cool the hydraulic fluid. This helps to prevent the fluid from overheating and ensures that it can effectively perform its function in the hoist system. The other options, such as the air-to-oil heat exchanger and the honeycomb cooling core, may also play a role in cooling the fluid, but the continuously running heat exchanger fan is specifically mentioned as the correct answer.

Explanation

The hydraulic fluid for the H-60 rescue hoist is cooled by a continuously running heat exchanger fan. This means that the fan is always running, providing a constant flow of air to cool the hydraulic fluid. This helps to prevent the fluid from overheating and ensures that it can effectively perform its function in the hoist system. The other options, such as the air-to-oil heat exchanger and the honeycomb cooling core, may also play a role in cooling the fluid, but the continuously running heat exchanger fan is specifically mentioned as the correct answer.

61. (412) H–60 fire detector sensors react to

Blue and red light.

White and red light.

Blue and white light.

Yellow and white light.

The correct answer is blue and red light. This is because fire detector sensors are designed to detect the specific wavelengths of light that are emitted by flames. Blue and red light are commonly associated with fire, as they are indicative of high temperatures. Therefore, fire detector sensors are programmed to react to these specific colors of light in order to accurately detect the presence of a fire.

Explanation

The correct answer is blue and red light. This is because fire detector sensors are designed to detect the specific wavelengths of light that are emitted by flames. Blue and red light are commonly associated with fire, as they are indicative of high temperatures. Therefore, fire detector sensors are programmed to react to these specific colors of light in order to accurately detect the presence of a fire.

62. (414) The H–60 fuel system pump that primes all fuel lines (if prime is lost) and acts as an auxiliary power unit (APU) boost for APU starts and operation is

Prime boost.

Hand wobble.

Engine-driven boost.

Auxiliary power plant (APP)-driven boost.

The correct answer is "prime boost." The H-60 fuel system pump serves two functions. Firstly, it primes all fuel lines if the prime is lost, ensuring that fuel is properly delivered to the engine. Secondly, it acts as an auxiliary power unit (APU) boost for APU starts and operation, providing additional power to the APU. Therefore, "prime boost" accurately describes the pump's dual role in priming fuel lines and boosting the APU.

Explanation

The correct answer is "prime boost." The H-60 fuel system pump serves two functions. Firstly, it primes all fuel lines if the prime is lost, ensuring that fuel is properly delivered to the engine. Secondly, it acts as an auxiliary power unit (APU) boost for APU starts and operation, providing additional power to the APU. Therefore, "prime boost" accurately describes the pump's dual role in priming fuel lines and boosting the APU.

63. (425) Vibration frequency is the number of cycles completed in

An hour.

A minute.

A second.

A specified period of time.

The correct answer is "a specified period of time." Vibration frequency refers to the number of cycles completed by a vibrating object within a given time frame. It can be measured in cycles per second (Hertz), cycles per minute, or cycles per hour, depending on the specific application. Therefore, the answer "a specified period of time" encompasses all possible time intervals for measuring vibration frequency.

Explanation

The correct answer is "a specified period of time." Vibration frequency refers to the number of cycles completed by a vibrating object within a given time frame. It can be measured in cycles per second (Hertz), cycles per minute, or cycles per hour, depending on the specific application. Therefore, the answer "a specified period of time" encompasses all possible time intervals for measuring vibration frequency.

64. (414) When the H–60 fuel boost pump is OFF, loss of engine fuel line prime is prevented by a

Shutoff valve on the submerged fuel boost pump.

Check valve on the submerged fuel boost pump.

Shutoff valve on the prime pump.

Check valve on the prime pump.

When the H-60 fuel boost pump is OFF, loss of engine fuel line prime is prevented by a check valve on the submerged fuel boost pump. A check valve allows the flow of fuel in one direction while preventing it from flowing back in the opposite direction. In this case, the check valve on the submerged fuel boost pump ensures that fuel does not flow back towards the engine when the boost pump is turned off, thereby maintaining the prime in the fuel lines.

Explanation

When the H-60 fuel boost pump is OFF, loss of engine fuel line prime is prevented by a check valve on the submerged fuel boost pump. A check valve allows the flow of fuel in one direction while preventing it from flowing back in the opposite direction. In this case, the check valve on the submerged fuel boost pump ensures that fuel does not flow back towards the engine when the boost pump is turned off, thereby maintaining the prime in the fuel lines.

65. (406) The H–60 thermal relief valve protects the pilot-assist servo module from thermal expansion of the hydraulic fluid

During storage.

When pressurized.

During installation.

When unpressurized.

The H-60 thermal relief valve is designed to protect the pilot-assist servo module from thermal expansion of the hydraulic fluid during storage. This means that when the helicopter is not in use and the hydraulic system is not pressurized, the valve ensures that any thermal expansion of the fluid does not cause damage to the servo module.

Explanation

The H-60 thermal relief valve is designed to protect the pilot-assist servo module from thermal expansion of the hydraulic fluid during storage. This means that when the helicopter is not in use and the hydraulic system is not pressurized, the valve ensures that any thermal expansion of the fluid does not cause damage to the servo module.

66. (425) What readings do you use to find the location and amount of imbalance on an H–60?

Inlet particle separator (IPS) and speed measurements.

Amplitude and phase angle measurements.

Phase angle and IPS measurements.

IPS and amplitude measurements.

In order to find the location and amount of imbalance on an H-60, amplitude and phase angle measurements are used. Amplitude refers to the magnitude or strength of the imbalance, while phase angle refers to the position or angle at which the imbalance occurs. By measuring both the amplitude and phase angle, it is possible to determine the location and amount of the imbalance on the H-60. The other options mentioned, such as IPS and speed measurements or IPS and amplitude measurements, do not directly provide information about the location and amount of imbalance.

Explanation

In order to find the location and amount of imbalance on an H-60, amplitude and phase angle measurements are used. Amplitude refers to the magnitude or strength of the imbalance, while phase angle refers to the position or angle at which the imbalance occurs. By measuring both the amplitude and phase angle, it is possible to determine the location and amount of the imbalance on the H-60. The other options mentioned, such as IPS and speed measurements or IPS and amplitude measurements, do not directly provide information about the location and amount of imbalance.

67. (432) The scroll vanes of the T700 engine are anti-iced by

Hot scavenge oil.

5th-stage bleed-air.

7th-stage bleed-air.

Electrical heating elements.

The scroll vanes of the T700 engine are anti-iced by hot scavenge oil. This means that the oil, which is already hot, is used to prevent ice formation on the scroll vanes. The hot scavenge oil is directed to the vanes, where it helps to keep them warm and prevent any ice buildup. This method of anti-icing is effective and efficient in ensuring that the engine operates smoothly and without any issues caused by ice formation.

Explanation

The scroll vanes of the T700 engine are anti-iced by hot scavenge oil. This means that the oil, which is already hot, is used to prevent ice formation on the scroll vanes. The hot scavenge oil is directed to the vanes, where it helps to keep them warm and prevent any ice buildup. This method of anti-icing is effective and efficient in ensuring that the engine operates smoothly and without any issues caused by ice formation.

68. (427) You are performing a tail rotor (TR) rig on an H–60. You are ready to make adjustments to the TR cable tension. You make these adjustments at the turnbuckles located

In front of the main module.

In front of the tail cone.

Aft of the main module.

Aft of the tail cone.

The correct answer is "in front of the tail cone." In an H-60 helicopter, the tail rotor (TR) rig adjustments are made at the turnbuckles located in front of the tail cone. The tail cone is the rear section of the helicopter, so the adjustments are made towards the front of this section. This is where the tension in the TR cable is adjusted to ensure proper alignment and operation of the tail rotor.

Explanation

The correct answer is "in front of the tail cone." In an H-60 helicopter, the tail rotor (TR) rig adjustments are made at the turnbuckles located in front of the tail cone. The tail cone is the rear section of the helicopter, so the adjustments are made towards the front of this section. This is where the tension in the TR cable is adjusted to ensure proper alignment and operation of the tail rotor.

69. (407) When pressed, the H–60 servo jam simulation button causes the

No. 1 and No. 2 PRI SERVO PRESS caution capsule to illuminate.

No. 1 or No. 2 PRI SERVO PRESS caution capsule to illuminate.

Primary servo to automatically switch to the second stage.

Primary servo to hydraulically depressurize the manifold.

When the H-60 servo jam simulation button is pressed, it causes either the No. 1 or No. 2 PRI SERVO PRESS caution capsule to illuminate.

Explanation

When the H-60 servo jam simulation button is pressed, it causes either the No. 1 or No. 2 PRI SERVO PRESS caution capsule to illuminate.

70. (421) What electrical check would you use to check for a specified amount of alternating current (AC) or direct current (DC) voltage in a particular wire or component on an H–60?

Probe

Ground.

Voltage.

Continuity

To check for a specified amount of alternating current (AC) or direct current (DC) voltage in a particular wire or component on an H-60, the electrical check that would be used is voltage. This involves using a voltmeter or multimeter to measure the voltage present in the wire or component. By connecting the probes of the voltmeter to the appropriate points, the voltage can be accurately measured and compared to the specified amount.

Explanation

To check for a specified amount of alternating current (AC) or direct current (DC) voltage in a particular wire or component on an H-60, the electrical check that would be used is voltage. This involves using a voltmeter or multimeter to measure the voltage present in the wire or component. By connecting the probes of the voltmeter to the appropriate points, the voltage can be accurately measured and compared to the specified amount.

71. (434) If you have a problem during H–60 auxiliary power unit (APU) start or operation, what color will the electronic sequence unit's (ESU) built-in test equipment (BITE) indicators change to illustrate the problem?

Yellow to red.

Red to yellow.

Black to white.

White to black.

During a problem with the H-60 auxiliary power unit (APU) start or operation, the electronic sequence unit's (ESU) built-in test equipment (BITE) indicators will change from black to white.

Explanation

During a problem with the H-60 auxiliary power unit (APU) start or operation, the electronic sequence unit's (ESU) built-in test equipment (BITE) indicators will change from black to white.

72. (437) The section of the tail drive shaft on an H–60 that contains interchangeable shafts is

I.

II.

III.

IV.

not-available-via-ai

Explanation

not-available-via-ai

73. (437) The H–60 tail gearbox changes the angle of drive by

58°.

98°.

105°

110°.

The H-60 tail gearbox changes the angle of drive by 105°.

Explanation

The H-60 tail gearbox changes the angle of drive by 105°.

74. (438) What is the operational pressure range, in pounds per square inch (psi), of the tail wheel tire?

105–115

115–125.

125–135.

200–300.

The operational pressure range of the tail wheel tire is 115-125 psi. This means that the tire should be inflated to a pressure within this range in order to operate effectively. Inflating the tire to a pressure below or above this range could result in poor performance or damage to the tire.

Explanation

The operational pressure range of the tail wheel tire is 115-125 psi. This means that the tire should be inflated to a pressure within this range in order to operate effectively. Inflating the tire to a pressure below or above this range could result in poor performance or damage to the tire.

75. (427) The statement that best describes flight control component proof torqueing is

Flight control component proof torqueing is a process that ensures that the bolt or nut on a flight control component is properly tightened and secured. The correct answer states that after torqueing and installing a cotter pin, the torque should be reduced to half of the specified torque. This is done to check if the bolt head will turn, indicating that the torque is not properly set. If the bolt head turns, it means that the torque needs to be increased. This process helps to ensure that the flight control component is securely fastened and reduces the risk of loosening during flight.

Explanation

Flight control component proof torqueing is a process that ensures that the bolt or nut on a flight control component is properly tightened and secured. The correct answer states that after torqueing and installing a cotter pin, the torque should be reduced to half of the specified torque. This is done to check if the bolt head will turn, indicating that the torque is not properly set. If the bolt head turns, it means that the torque needs to be increased. This process helps to ensure that the flight control component is securely fastened and reduces the risk of loosening during flight.

76. (436) The main transmission on the H–60 is equipped with

Two lubrication pumps operating in parallel.

Two lubrication pumps operating individually.

Four lubrication pumps operating individually.

Four lubrication pumps operating in sequence.

The H-60 main transmission is equipped with two lubrication pumps operating in parallel. This means that both pumps are working simultaneously to provide lubrication to the transmission system. Operating in parallel ensures that there is redundancy in the lubrication system, so if one pump fails, the other can continue to provide lubrication, preventing any damage or failure of the transmission.

Explanation

The H-60 main transmission is equipped with two lubrication pumps operating in parallel. This means that both pumps are working simultaneously to provide lubrication to the transmission system. Operating in parallel ensures that there is redundancy in the lubrication system, so if one pump fails, the other can continue to provide lubrication, preventing any damage or failure of the transmission.

77. (413) When you place an H–60's WINDSHIELD ANTI-ICE COPILOT switch to the ON position, you should feel heat on the copilot's windshield in approximately

One minute.

Three minutes.

Five minutes.

Seven minutes.

When the H-60's WINDSHIELD ANTI-ICE COPILOT switch is turned ON, it takes approximately five minutes for heat to be felt on the copilot's windshield.

Explanation

When the H-60's WINDSHIELD ANTI-ICE COPILOT switch is turned ON, it takes approximately five minutes for heat to be felt on the copilot's windshield.

78. (415) The centrifugal-type fuel transfer pumps on the H–60 helicopter are powered by

120 volt alternating current (VAC).

28 volts direct current (VDC).

115 VAC.

12 VDC.

The centrifugal-type fuel transfer pumps on the H-60 helicopter are powered by 28 volts direct current (VDC). This means that the pumps require a direct current electrical power source with a voltage of 28 volts. The use of direct current is important because it allows for a more efficient and reliable operation of the pumps. Alternating current (AC) or a different voltage would not be suitable for powering these specific pumps.

Explanation

The centrifugal-type fuel transfer pumps on the H-60 helicopter are powered by 28 volts direct current (VDC). This means that the pumps require a direct current electrical power source with a voltage of 28 volts. The use of direct current is important because it allows for a more efficient and reliable operation of the pumps. Alternating current (AC) or a different voltage would not be suitable for powering these specific pumps.

79. (420) The No.1 and No.2 direct current (DC) power converters on the H–60 helicopter receive power from

The alternating current (AC) primary buses.

Their respective generators.

Their respective batteries.

The DC primary buses.

The No.1 and No.2 DC power converters on the H-60 helicopter receive power from the alternating current (AC) primary buses. This means that they are connected to the AC primary buses to convert the AC power into DC power. The generators and batteries are not mentioned in relation to the power source for these power converters, so they are not the correct answer. The DC primary buses are also not mentioned as the power source for these converters. Therefore, the correct answer is that they receive power from the AC primary buses.

Explanation

The No.1 and No.2 DC power converters on the H-60 helicopter receive power from the alternating current (AC) primary buses. This means that they are connected to the AC primary buses to convert the AC power into DC power. The generators and batteries are not mentioned in relation to the power source for these power converters, so they are not the correct answer. The DC primary buses are also not mentioned as the power source for these converters. Therefore, the correct answer is that they receive power from the AC primary buses.

80. (422) You externally zero the pointer on the H–60 vertical speed indicator by adjusting the screw in the

Upper left corner of the indicator.

Lower left corner of the indicator.

Upper right corner of the indicator.

Lower right corner of the indicator.

To externally zero the pointer on the H-60 vertical speed indicator, you need to adjust the screw located in the lower left corner of the indicator.

Explanation

To externally zero the pointer on the H-60 vertical speed indicator, you need to adjust the screw located in the lower left corner of the indicator.

81. (436) The pressure side of the H–60 main transmission lubrication pumps supplies oil in gallons per minute (gpm) and pounds per square inch (psi) at a rate of

5 gpm at 50 – 55 psi.

10 gpm at 15 – 20 psi.

15 gpm at 50 – 55 psi.

20 gpm at 15 – 20 psi.

The correct answer is 15 gpm at 50 - 55 psi. This means that the pressure side of the H-60 main transmission lubrication pumps supplies oil at a rate of 15 gallons per minute (gpm) and at a pressure of 50 - 55 pounds per square inch (psi). This information is important for understanding the flow rate and pressure of the oil being supplied to the main transmission, which is crucial for proper lubrication and operation of the H-60 helicopter.

Explanation

The correct answer is 15 gpm at 50 - 55 psi. This means that the pressure side of the H-60 main transmission lubrication pumps supplies oil at a rate of 15 gallons per minute (gpm) and at a pressure of 50 - 55 pounds per square inch (psi). This information is important for understanding the flow rate and pressure of the oil being supplied to the main transmission, which is crucial for proper lubrication and operation of the H-60 helicopter.

82. (419) The type of protection that functions only during ground operation of the No. 1 and No. 2 generator control units on the H–60 is

Underfrequency.

Overfrequency.

Undervoltage.

Overvoltage.

The correct answer is overfrequency. This means that the type of protection that only functions during ground operation of the No. 1 and No. 2 generator control units on the H-60 helicopter is overfrequency. This protection system is designed to detect and respond to excessive frequency levels in the generator units, ensuring their safe operation during ground operations.

Explanation

The correct answer is overfrequency. This means that the type of protection that only functions during ground operation of the No. 1 and No. 2 generator control units on the H-60 helicopter is overfrequency. This protection system is designed to detect and respond to excessive frequency levels in the generator units, ensuring their safe operation during ground operations.

83. (429) Which sumps are used for the emergency oil system on the T700 engine?

A and B only.

A and C only.

B and C only.

A, B, and C.

The correct answer is A and B only. This means that sumps A and B are used for the emergency oil system on the T700 engine. Sumps C is not used for this purpose.

Explanation

The correct answer is A and B only. This means that sumps A and B are used for the emergency oil system on the T700 engine. Sumps C is not used for this purpose.

84. (432) The hydromechanical unit actuating system on the T700 engine will open the start bleed valve when gas generator speed (Ng) goes below

52 percent.

67 percent.

72 percent.

87 percent.

The hydromechanical unit actuating system on the T700 engine opens the start bleed valve when the gas generator speed (Ng) goes below 87 percent. This means that when the engine's gas generator speed drops below 87 percent, the start bleed valve will open.

Explanation

The hydromechanical unit actuating system on the T700 engine opens the start bleed valve when the gas generator speed (Ng) goes below 87 percent. This means that when the engine's gas generator speed drops below 87 percent, the start bleed valve will open.

85. (433) The H–60 auxiliary power unit (APU) component protected by a 10-micron inlet filter is the

Oil filter.

Oil pump.

Fuel pump.

Fuel control.

The H-60 auxiliary power unit (APU) has a 10-micron inlet filter that protects the fuel pump. This filter is designed to prevent any contaminants or impurities from entering the fuel pump, which could cause damage or affect its performance. Therefore, the correct answer is fuel pump.

Explanation

The H-60 auxiliary power unit (APU) has a 10-micron inlet filter that protects the fuel pump. This filter is designed to prevent any contaminants or impurities from entering the fuel pump, which could cause damage or affect its performance. Therefore, the correct answer is fuel pump.

86. (436) On the H–60, filtered oil is provided to all main transmission bearings and gears by the

Integral sump lubrication system.

Input module lubrication system.

Accessory module oil tank system.

Main lube and scavenge oil system.

The correct answer is integral sump lubrication system. This means that on the H-60, the main transmission bearings and gears are provided with filtered oil through a lubrication system that is integrated within the sump. This ensures that the lubrication is directly provided to the necessary components, promoting smooth operation and reducing wear and tear.

Explanation

The correct answer is integral sump lubrication system. This means that on the H-60, the main transmission bearings and gears are provided with filtered oil through a lubrication system that is integrated within the sump. This ensures that the lubrication is directly provided to the necessary components, promoting smooth operation and reducing wear and tear.

87. (431) The thermocouple harness on the T700 engine is a

Two-piece assembly with seven removable probes.

One-piece assembly with seven removable probes.

Two-piece assembly with seven non-removable probes.

One-piece assembly with seven non-removable probes.

The thermocouple harness on the T700 engine is a one-piece assembly with seven non-removable probes. This means that the harness is made up of a single unit and cannot be taken apart or separated into multiple pieces. Additionally, the probes on the harness are also non-removable, indicating that they cannot be detached or replaced individually.

Explanation

The thermocouple harness on the T700 engine is a one-piece assembly with seven non-removable probes. This means that the harness is made up of a single unit and cannot be taken apart or separated into multiple pieces. Additionally, the probes on the harness are also non-removable, indicating that they cannot be detached or replaced individually.

88. (436) On the H–60, the oil between the main module and the passages to the input modules, accessory modules, and generators is divided by the

Main module manifold.

Input module manifold.

Accessory module manifold.

Lubrication jets in the main module.

The correct answer is the main module manifold. The question is asking about the division of oil between the main module and the passages to the input modules, accessory modules, and generators. The main module manifold is responsible for dividing the oil between these different components.

Explanation

The correct answer is the main module manifold. The question is asking about the division of oil between the main module and the passages to the input modules, accessory modules, and generators. The main module manifold is responsible for dividing the oil between these different components.

89. (420) To monitor the voltage capacity of the battery and generator, the H–60 flight engineer console is equipped with a

Battery-conditioning warning system.

Voltage-conditioning warning system.

Battery-generator meter.

Voltage-generator meter.

The correct answer is "battery-generator meter" because the H-60 flight engineer console is equipped with a meter that monitors the voltage capacity of both the battery and the generator. This meter allows the flight engineer to keep track of the power levels of both the battery and the generator, ensuring that they are functioning properly and providing sufficient power to the aircraft systems.

Explanation

The correct answer is "battery-generator meter" because the H-60 flight engineer console is equipped with a meter that monitors the voltage capacity of both the battery and the generator. This meter allows the flight engineer to keep track of the power levels of both the battery and the generator, ensuring that they are functioning properly and providing sufficient power to the aircraft systems.

90. (438) If elastomer extrusion is identified on an elastomeric bearing, the bearing should be replaced

Within the next 50 flight hours.

Within the next 10 flight hours.

At the next phase inspection.

Immediately.

If elastomer extrusion is identified on an elastomeric bearing, it indicates that the bearing has been damaged or compromised. Elastomer extrusion refers to the deformation or displacement of the elastomeric material from its intended position. This can lead to a loss of structural integrity and affect the bearing's performance. To prevent any further damage or failure, it is recommended to replace the bearing within the next 50 flight hours. This timeframe allows for timely maintenance and ensures the safety and reliability of the bearing during subsequent flights.

Explanation

If elastomer extrusion is identified on an elastomeric bearing, it indicates that the bearing has been damaged or compromised. Elastomer extrusion refers to the deformation or displacement of the elastomeric material from its intended position. This can lead to a loss of structural integrity and affect the bearing's performance. To prevent any further damage or failure, it is recommended to replace the bearing within the next 50 flight hours. This timeframe allows for timely maintenance and ensures the safety and reliability of the bearing during subsequent flights.

91. (422) The H–60 instrument that is part of the global positioning system (GPS) is the

Horizontal situation indicator (HSI).

Vertical situation indicator (VSI).

Inertial navigation system (INS).

Stabilator position indicator.

The H-60 instrument that is part of the global positioning system (GPS) is the horizontal situation indicator (HSI). The HSI is a navigational instrument that provides pilots with important information about their aircraft's position, heading, and course. It displays the aircraft's heading on a compass rose and also includes a course deviation indicator (CDI) that shows the aircraft's position relative to a selected course. The HSI is commonly used in aviation to assist pilots in maintaining situational awareness and navigating accurately.

Explanation

The H-60 instrument that is part of the global positioning system (GPS) is the horizontal situation indicator (HSI). The HSI is a navigational instrument that provides pilots with important information about their aircraft's position, heading, and course. It displays the aircraft's heading on a compass rose and also includes a course deviation indicator (CDI) that shows the aircraft's position relative to a selected course. The HSI is commonly used in aviation to assist pilots in maintaining situational awareness and navigating accurately.

92. (426) The H–60 flight control feature that will counteract the pitching movement resulting from the vertical lift of the canted tail rotor (TR) is the

Collective to longitudinal mixing.

Yaw to longitudinal mixing.

Collective to yaw mixing.

Yaw to directional mixing.

The correct answer is yaw to longitudinal mixing. In a helicopter, the canted tail rotor creates a pitching movement due to the vertical lift it generates. To counteract this pitching movement, the helicopter's flight control system uses yaw to longitudinal mixing. This means that when the helicopter yaws (rotates around its vertical axis), the flight control system adjusts the longitudinal control inputs (such as the collective pitch) to counteract the pitching movement caused by the canted tail rotor. This ensures that the helicopter remains stable and maintains its desired flight path.

Explanation

The correct answer is yaw to longitudinal mixing. In a helicopter, the canted tail rotor creates a pitching movement due to the vertical lift it generates. To counteract this pitching movement, the helicopter's flight control system uses yaw to longitudinal mixing. This means that when the helicopter yaws (rotates around its vertical axis), the flight control system adjusts the longitudinal control inputs (such as the collective pitch) to counteract the pitching movement caused by the canted tail rotor. This ensures that the helicopter remains stable and maintains its desired flight path.

93. (426) On the H–60, the yaw stability augmentation system (SAS) command comes from an alternating current (AC)-powered

Collective rate gyro.

Cyclic rate gyro.

Yaw rate servo.

Yaw rate gyro.

The correct answer is yaw rate gyro. The yaw stability augmentation system (SAS) command on the H-60 helicopter is derived from the yaw rate gyro. A yaw rate gyro measures the rate of change of the helicopter's yaw (rotation around the vertical axis) and provides this information to the SAS, which then makes adjustments to maintain stability. The other options, such as the collective rate gyro and cyclic rate gyro, are not directly related to yaw stability and would not be used for this purpose.

Explanation

The correct answer is yaw rate gyro. The yaw stability augmentation system (SAS) command on the H-60 helicopter is derived from the yaw rate gyro. A yaw rate gyro measures the rate of change of the helicopter's yaw (rotation around the vertical axis) and provides this information to the SAS, which then makes adjustments to maintain stability. The other options, such as the collective rate gyro and cyclic rate gyro, are not directly related to yaw stability and would not be used for this purpose.

94. (419) On the H–60, 115-VAC, B-phase power is connected to the alternating current (AC) essential bus by the

XFR relay.

Bus fail relay.

Current limiters.

Generator control unit (GCU).

The correct answer is XFR relay. On the H-60, the XFR relay is responsible for connecting the 115-VAC, B-phase power to the AC essential bus. This relay ensures that the power is properly distributed to the essential bus, allowing for the operation of essential systems and equipment on the aircraft.

Explanation

The correct answer is XFR relay. On the H-60, the XFR relay is responsible for connecting the 115-VAC, B-phase power to the AC essential bus. This relay ensures that the power is properly distributed to the essential bus, allowing for the operation of essential systems and equipment on the aircraft.

95. (420) The H–60 direct current (DC) essential bus is connected to the battery bus by the

No. 1 DC essential bus relay.

No. 2 DC essential bus relay.

Battery bus relay.

DC monitoring bus relay.

The H-60 direct current (DC) essential bus is connected to the battery bus by the No. 2 DC essential bus relay. This relay is responsible for ensuring that power from the battery bus is properly distributed to the DC essential bus, which is crucial for the operation of essential systems in the aircraft. The No. 1 DC essential bus relay and the DC monitoring bus relay are not involved in this connection.

Explanation

The H-60 direct current (DC) essential bus is connected to the battery bus by the No. 2 DC essential bus relay. This relay is responsible for ensuring that power from the battery bus is properly distributed to the DC essential bus, which is crucial for the operation of essential systems in the aircraft. The No. 1 DC essential bus relay and the DC monitoring bus relay are not involved in this connection.

96. (431) The T700 engine component that stops fuel-flow after sensing an overspeed condition is the

Overspeed and drain valve (ODV).

Digital electrical control (DEC).

Hydromechanical unit (HMU).

Load demand spindle (LDS).

The T700 engine component that stops fuel-flow after sensing an overspeed condition is the digital electrical control (DEC). The DEC is responsible for monitoring and controlling various functions of the engine, including fuel flow. In the event of an overspeed condition, the DEC detects the excessive rotational speed and activates the necessary mechanisms to shut off the fuel flow, preventing further damage to the engine. The overspeed and drain valve (ODV), hydromechanical unit (HMU), and load demand spindle (LDS) are not specifically designed to stop fuel-flow in an overspeed condition.

Explanation

The T700 engine component that stops fuel-flow after sensing an overspeed condition is the digital electrical control (DEC). The DEC is responsible for monitoring and controlling various functions of the engine, including fuel flow. In the event of an overspeed condition, the DEC detects the excessive rotational speed and activates the necessary mechanisms to shut off the fuel flow, preventing further damage to the engine. The overspeed and drain valve (ODV), hydromechanical unit (HMU), and load demand spindle (LDS) are not specifically designed to stop fuel-flow in an overspeed condition.

97. (422) The back panel of the H–60 central display unit (CDU) is equipped with

Two fuses.

Four fuses.

Six fuses.

Eight fuses.

The correct answer is eight fuses. The back panel of the H-60 central display unit (CDU) is equipped with eight fuses.

Explanation

The correct answer is eight fuses. The back panel of the H-60 central display unit (CDU) is equipped with eight fuses.

98. (406) The utility module on the H–60 connects hydraulic pressure to the

First stage of the TR servo.

First stage of the flight control servo.

Second stage of the flight control servo.

Second stage of the tail rotor (TR) servo.

The correct answer is second stage of the tail rotor (TR) servo. The utility module on the H-60 is responsible for connecting hydraulic pressure to the second stage of the tail rotor servo. This means that the utility module helps to control the movement and positioning of the tail rotor, which is an important component for stabilizing and maneuvering the helicopter during flight.

Explanation

The correct answer is second stage of the tail rotor (TR) servo. The utility module on the H-60 is responsible for connecting hydraulic pressure to the second stage of the tail rotor servo. This means that the utility module helps to control the movement and positioning of the tail rotor, which is an important component for stabilizing and maneuvering the helicopter during flight.

99. (414) The submerged fuel boost system on the H–60 operates in conjunction with the

Fuel dump system

Prime/boost system

Fuel transfer pumps

Engine-driven boost pump

The submerged fuel boost system on the H-60 operates in conjunction with the engine-driven boost pump. This means that the engine-driven boost pump plays a vital role in the functioning of the submerged fuel boost system. It is likely that the engine-driven boost pump provides the necessary power or pressure to boost the fuel in the submerged fuel boost system, ensuring proper fuel flow and delivery to the engine.

Explanation

The submerged fuel boost system on the H-60 operates in conjunction with the engine-driven boost pump. This means that the engine-driven boost pump plays a vital role in the functioning of the submerged fuel boost system. It is likely that the engine-driven boost pump provides the necessary power or pressure to boost the fuel in the submerged fuel boost system, ensuring proper fuel flow and delivery to the engine.

100. (424) The tail rotor (TR) on the H–60 is canted upward

3.

9.

17.

20

The correct answer is 20 degrees. The tail rotor on the H-60 is canted upward at 20 degrees. Canted means that the rotor is tilted or angled in a specific direction. In this case, the tail rotor is angled upward at 20 degrees. This upward angle helps to counteract the torque produced by the main rotor, providing stability and control to the helicopter.

Explanation

The correct answer is 20 degrees. The tail rotor on the H-60 is canted upward at 20 degrees. Canted means that the rotor is tilted or angled in a specific direction. In this case, the tail rotor is angled upward at 20 degrees. This upward angle helps to counteract the torque produced by the main rotor, providing stability and control to the helicopter.