2A552 CDC Vol 3 H60

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  • 1/100 Questions

    (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.
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2A552 Quizzes & Trivia
About This Quiz

This quiz assesses knowledge on the H-60 helicopter, focusing on system cooling, vibration absorbers, and landing gear mechanisms. It's designed for military aircraft maintenance personnel to ensure operational proficiency and safety.

Quiz Preview

  • 2. 

    (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.

    Correct Answer
    A. Right stabilator attachment fitting.
    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.

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  • 3. 

    (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.

    Correct Answer
    A. Main landing gear drag beam support fairings.
    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.

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  • 4. 

    (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.

    Correct Answer
    A. Cabin.
    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.

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  • 5. 

    (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.

    Correct Answer
    A. Fork assembly.
    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.

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  • 6. 

    (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.

    Correct Answer
    A. Master cylinder.
    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.

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  • 7. 

    (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.

    Correct Answer
    A. Are no hydraulic fluid leaks.
    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.

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  • 8. 

    (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.

    Correct Answer
    A. Release the parking brake.
    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.

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  • 9. 

    (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.

    Correct Answer
    A. Stabilator.
    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.

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  • 10. 

    (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.

    Correct Answer
    A. Backup hydraulic system.
    Explanation
    To operationally check the H-60 hydraulic system during ground operations, the backup hydraulic system is used.

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  • 11. 

    (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.

    Correct Answer
    A. 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.

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  • 12. 

    (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.

    Correct Answer
    A. Second stage of the tail rotor (TR) servo.
    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.

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  • 13. 

    (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.

    Correct Answer
    A. During storage.
    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.

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  • 14. 

    (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.

    Correct Answer
    A. 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.

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  • 15. 

    (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.

    Correct Answer
    A. Excessive.
    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.

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  • 16. 

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

    • 4,000 pounds.

    • 6,000 pounds.

    • 8,000 pounds.

    • 10,000 pounds.

    Correct Answer
    A. 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.

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  • 17. 

    (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.

    Correct Answer
    A. Release the load during an emergency.
    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.

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  • 18. 

    (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.

    Correct Answer
    A. A new squib is installed.
    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.

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  • 19. 

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

    • Emergency.

    • Standard.

    • Manual.

    • Normal.

    Correct Answer
    A. Standard.
    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.

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  • 20. 

    (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.

    Correct Answer
    A. A continuously running heat exchanger fan.
    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.

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  • 21. 

    (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.

    Correct Answer
    A. Leather gloves and maintain tension on the cable.
    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.

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  • 22. 

    (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.

    Correct Answer
    A. Hook bearing not rotating freely.
    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.

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  • 23. 

    (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.

    Correct Answer
    A. Bleed-air mixing.
    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.

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  • 24. 

    (412) H–60 fire detector sensors react to

    • Blue and red light.

    • White and red light.

    • Blue and white light.

    • Yellow and white light.

    Correct Answer
    A. Blue and red light.
    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.

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  • 25. 

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

    • 70 – 115ï‚°F.

    • 90 – 150ï‚°F.

    • 70 – 115ï‚°C.

    • 70 – 150ï‚°C.

    Correct Answer
    A. 70 – 115F.
    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.

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  • 26. 

    (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.

    Correct Answer
    A. Five minutes.
    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.

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  • 27. 

    (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.

    Correct Answer
    A. Breakaway.
    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.

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  • 28. 

    (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.

    Correct Answer
    A. Prime boost.
    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.

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  • 29. 

    (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

    Correct Answer
    A. Engine-driven boost pump
    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.

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  • 30. 

    (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.

    Correct Answer
    A. Check valve on the submerged fuel boost pump.
    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.

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  • 31. 

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

    • Flow transmitter.

    • Management package.

    • Directional transmitter.

    • Probe management package.

    Correct Answer
    A. Management package.
    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.

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  • 32. 

    (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.

    Correct Answer
    A. 170 gallons.
    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.

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  • 33. 

    (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.

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

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  • 34. 

    (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.

    Correct Answer
    A. 28 volts direct current (VDC).
    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.

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  • 35. 

    (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.

    Correct Answer
    A. 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.

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  • 36. 

    (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.

    Correct Answer
    A. 172 pounds.
    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.

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  • 37. 

    (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.

    Correct Answer
    A. Fuel.
    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.

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  • 38. 

    (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.

    Correct Answer
    A. IND TEST push-button on the miscellaneous switch panel.
    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.

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  • 39. 

    (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.

    Correct Answer
    A. The mechanical components are hard to access.
    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.

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  • 40. 

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

    • 5/10.

    • 10/20.

    • 20/30.

    • 25/35.

    Correct Answer
    A. 20/30.
    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.

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  • 41. 

    (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).

    Correct Answer
    A. XFR relay.
    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.

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  • 42. 

    (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.

    Correct Answer
    A. The alternating current (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.

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  • 43. 

    (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.

    Correct Answer
    A. Battery-generator meter.
    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.

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  • 44. 

    (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.

    Correct Answer
    A. No. 2 DC essential bus relay.
    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.

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  • 45. 

    (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.

    Correct Answer
    A. A multimeter.
    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.

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  • 46. 

    (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.

    Correct Answer
    A. Continuity.
    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.

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  • 47. 

    (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

    Correct Answer
    A. Voltage.
    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.

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  • 48. 

    (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.

    Correct Answer
    A. 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.

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  • 49. 

    (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.

    Correct Answer
    A. Auxiliary power unit (APU) generator.
    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.

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Quiz Review Timeline (Updated): Mar 20, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 20, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jan 11, 2014
    Quiz Created by
    Bradcarrierice24

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