Stepper Motors & Rotor Control Quiz

The dielectric used in the H60 fuel quantity indicating system is fuel. In this system, the fuel acts as the dielectric material, which is a substance that can store electrical energy when placed between two conductive plates. By measuring the changes in the electrical properties of the fuel, the system can accurately determine the quantity of fuel present in the tank.

The outside air temperature (OAT) sensor provides a signal to the de-ice controller for heating of the rotor blades. This is because the OAT sensor measures the temperature of the surrounding air, which is crucial in determining whether there is a risk of ice formation on the rotor blades. If the OAT sensor detects a low temperature, it sends a signal to the de-ice controller, which then activates the heating system to prevent ice buildup on the blades.

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 and temperature gases into mechanical energy, which is then used to drive the helicopter's main rotor system. The power turbine is a critical component in generating the necessary power for the helicopter's operation.

A supplement is an auxiliary publication that provides additional information or instructions to directive type publications issued by higher headquarters. It serves to enhance and expand upon the content of the original publication, providing further guidance or clarification. A supplement is typically used when there is a need to update or add to the existing directives, without completely revising the original publication. It helps to ensure that the information remains current and relevant, while also providing a means for higher headquarters to communicate any changes or updates to their directives.

The Training Manager is responsible for assigning roles and determining the actions that individuals are allowed to perform in the Training Business Area (TBA). They have the authority and knowledge to allocate tasks and responsibilities based on the needs of the training program. The Training Manager ensures that each individual is given appropriate roles and permissions to effectively carry out their duties within the TBA.

When the granted extension period of a replacement schedule has been reached, the aircraft will be grounded. This means that the aircraft will not be allowed to fly until further notice. This could be due to the fact that the aircraft has reached its maximum allowed flying hours or has not undergone the required inspection. Grounding the aircraft ensures that it is safe to operate and minimizes the risk of any potential issues or accidents.

The key and keyway on the standard electrical connector are located adjacent to the A or 1 pin.

Special-purpose slings are specifically designed and constructed for the purpose of removing aircraft engines. These slings are engineered to safely lift and support the weight of the engines, which can be quite heavy. They are made with materials that are strong, durable, and resistant to damage from the weight and shape of the engine. Special-purpose slings also have features such as adjustable straps or hooks that allow for secure attachment to the engine. Using a special-purpose sling ensures the safe and efficient removal of aircraft engines.

A normal towing operation typically requires at least three tow crewmembers. Having three crewmembers ensures that there is enough manpower to safely and effectively operate the towing equipment, secure the vehicle being towed, and provide assistance if any issues arise during the towing process. With fewer than three crewmembers, the operation may be more difficult to carry out and could potentially pose risks to both the crew and the vehicles involved.

The given answer states that hydraulic pump 1 delivers 38 gallons per minute (GPM) of hydraulic fluid for helicopters and 32 GPM for airplanes.

The CRANK/START gate is the component that prevents inadvertent engine shutdown when the condition lever is moved from FLY to START position. This gate ensures that the engine remains running during the transition, preventing any accidental shutdowns.

Dedicated bus health monitors are components of the alternating current system that continuously check the voltages on each phase of the bus. They ensure that the voltages are within the 109-115 volts AC (VAC) tolerance. This monitoring is crucial for maintaining the stability and safety of the electrical system. Bus bars, circuit breakers, and terminal boards may play important roles in the AC system, but they do not specifically monitor the voltages to ensure they are within the specified tolerance.

The search/landing lights need to be extended by 10 degrees before they can be turned on.

Each engine fire suppression bottle is pressurized to 600 psi of nitrogen precharge.

The right tagb's single stage oil filter assembly contains a constant frequency generator bypass valve.

The correct answer is FADEC. FADEC stands for Full Authority Digital Engine Control, which is an advanced electronic system used in modern aircraft engines to control and regulate various engine parameters, including ignition. It rectifies and regulates the three-phase power generated by the Permanent Magnet Alternator (PMA), ensuring proper ignition timing and fuel flow for optimal engine performance. The FADEC system continuously monitors and adjusts the engine parameters based on inputs from various sensors, providing precise control and efficient operation of the ignition system.

The brake lining wear pin indicates the level of wear on the brake linings. When the wear pin is flush with the housing nut, it means that the brake linings have worn down to the minimum acceptable level and need to be replaced. Therefore, replacing the brake linings on an H60 is necessary when the wear pin is flush with the housing nut.

The H60 parking brake handle is located on the pilot's side of the center console.

The master cylinder allows for thermal expansion when the brakes on an H60 are OFF. The master cylinder is responsible for converting the pressure applied to the brake pedal into hydraulic pressure, which then activates the wheel brake assembly. When the brakes are not engaged, the master cylinder still allows for thermal expansion, ensuring that the hydraulic fluid can expand and contract with temperature changes without causing any damage to the braking system.

To prevent scratching the windshield when performing an ops check of the H60 windshield wiper system, it is recommended to install a cotter pin in the wiper hold off pin holes. This will ensure that the wiper blades are held off the windshield surface, preventing any potential damage or scratching.

The elastomeric bearings on the H60 rotor hub allow the main rotor blades to droop, flap, lead, and lag. This means that the bearings provide flexibility and allow the blades to move in response to various forces and conditions during flight. This flexibility is important for stability, maneuverability, and overall performance of the helicopter.

The H60 main rotor blade uses electro-thermal blankets for de-icing. These blankets are designed to generate heat and melt any ice that may accumulate on the blade during flight. This helps to ensure that the rotor blade remains clear of ice, which can affect its performance and potentially lead to dangerous situations. The use of electro-thermal blankets is a common method for de-icing aircraft components, as it provides an efficient and effective solution to prevent ice buildup.

The yellow color indicates that the pressure in an H60 rotor blade is safe. This is because the slots in the blade inspection method pressure indicator turn yellow when the pressure is within the safe range. The other colors (red, black, and white) are not mentioned in the context of indicating safe pressure levels, so they can be ruled out as the correct answer.

The correct answer is "safety critical." On an H60, the procedures for the screw threaded component identified by **SC** are related to safety critical operations. This suggests that this particular component plays a crucial role in ensuring the safety of the H60 aircraft.

The electronic sequence unit (ESU) on an H60 takes a reading of the major parameters of the APU every 50 milliseconds. This means that it continuously monitors and updates the data related to the APU at a high frequency, allowing for real-time monitoring and control of the APU's performance. This frequent reading ensures that any changes or issues with the APU can be quickly detected and addressed.

Vibration is best defined as the periodic back and forth movement of a component. This movement is caused by unbalance or external forces acting on the component. Unbalance refers to an uneven distribution of mass within the component, leading to an imbalance and causing vibration. External forces, on the other hand, can be external impacts or forces applied to the component, which also result in vibration. Therefore, the correct answer is unbalance or external forces.

Amplitude is the measurement term used to display the level or amount of vibration present on the H60. Amplitude refers to the maximum displacement or distance from the equilibrium position of a vibrating object. It is commonly used to quantify the intensity or strength of vibrations, indicating the extent of oscillation or movement. In the context of the H60, amplitude would provide information about the magnitude of vibration experienced by the aircraft, helping to assess the potential impact on its performance and structural integrity.

The correct answer is the -9 of the aircraft you are using for transport. This is because the -9 refers to the specific manual or document that provides guidance on loading and offloading procedures for the particular aircraft being used. It is important to consult this manual to ensure proper and safe handling of the helicopter during transport. The other options listed are not relevant to the specific question.

The max safe noise level before hearing loss occurs is 95 db. Continuous exposure to noise levels above this threshold can lead to permanent damage to the ears and cause hearing loss. It is important to protect one's ears by wearing earplugs or earmuffs in noisy environments to prevent any potential harm.

A schematic is a visual representation of a system that shows the interconnections between its components. It provides a simplified and organized view of the system, allowing technicians to easily understand how the system works and how its components are connected. By studying the schematic, technicians can troubleshoot issues more effectively as they can identify potential problem areas and understand the flow of signals or power within the system. Therefore, a schematic is a troubleshooting aid that promotes understanding of the system.

Units must develop emergency recall or mobilization rosters to ensure crashed, damaged, or disabled aircraft recovery (CDDAR) coverage after duty hours. These rosters allow for the quick mobilization of personnel in case of an emergency, ensuring that there is a team available to respond to CDDAR incidents even outside of regular duty hours. This helps to minimize response time and ensure a timely and effective recovery operation. Having these rosters in place is essential for maintaining readiness and ensuring the safety and security of aircraft and personnel.

Steam cleaning can damage/deteriorate sealants, paint coatings, elastomers, as well as disbond adhesives and craze plastics. The high temperature and pressure of steam can cause the sealants, coatings, elastomers, adhesives, and plastics to soften, warp, or even melt. This can lead to the degradation of the materials and compromise the integrity of the aircraft's surfaces. Therefore, steam cleaning is not recommended for cleaning aircraft to avoid potential damage to these components.

During the conversion from helicopter mode to aircraft mode, the type of rotor control that is phased out is the cyclic. The cyclic control is used in helicopters to change the pitch of the rotor blades at different points in the rotation, allowing the helicopter to move in different directions. However, in aircraft mode, the rotor is no longer used for propulsion, and the cyclic control becomes unnecessary.

The landing gear control unit (LGCU) is responsible for providing control and indication of the primary landing gear extension/retraction system. It also controls the emergency extension system in case the primary system fails. The LGCU acts as the central control unit for the landing gear, ensuring proper functioning and safety during landing and takeoff.

The correct answer is "Hydraulic fluid level monitor (HFLM)". The HFLM is responsible for monitoring the fluid level in the reservoirs for hydraulic systems 1, 2, and 3. It ensures that the fluid level is maintained within the appropriate range to ensure the proper functioning of the hydraulic systems.

The correct answer is the permanent magnet generator. A permanent magnet generator is a type of generator that uses a permanent magnet to generate electrical power. It contains a separate and isolated winding that provides a maximum rated continuous power output of 420 volt amperes (VA) at 0.8 power factor, or 26 to 62 volts alternating current (VAC), specifically for the flight control system. This type of generator is commonly used in aerospace applications due to its compact size, high efficiency, and reliable power output.

The correct answer is "bleed air mixing". On the H60, the valve type used to mix engine or APU bleed air with the ambient air to obtain the desired temperature is called bleed air mixing. This valve allows for the regulation and control of the temperature by blending the hot bleed air with the cooler ambient air, ensuring that the desired temperature is achieved for various systems and components in the aircraft.

When one main fuel tank is at 887 lbs and the other is at less than 1000 lbs, fuel will automatically transfer on the H60.

The correct answer is 115 VAC. The centrifugal type fuel transfer pumps on the H60 operate using 115 VAC power.

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 and leaving the filter. By sensing the differential pressure, the sensor can determine if the filter is becoming clogged or if there are any issues with the fuel flow. This information is important for maintaining the engine's performance and preventing damage.

To convert hertz (Hz) into revolutions per minute (RPM), you need to multiply the frequency in Hz by 60. This is because there are 60 seconds in a minute, so multiplying by 60 converts the frequency from Hz to cycles per minute. Since one revolution is equal to one cycle, multiplying by 60 gives the frequency in RPM.

To bring the tip targets closer together for viewing when using the 8500C balance analyzer to track the main rotor blades on an H60, you should hold down the right arrow key. This key is likely programmed to adjust the display settings and zoom in on the tip targets, allowing for a closer and clearer view of the rotor blades.

The control display unit is the component that provides the interface between the integrated vehicle health monitoring system (IVHMS) and the aircrew. It allows the aircrew to view and interact with the data collected by the IVHMS, providing them with important information about the health and status of the vehicle.

The Maintenance Group Commander (MXG/CC) appoints the crashed, damaged, or disabled aircraft recovery (CDDAR) Team Chief. This individual is responsible for overseeing the recovery of aircraft that have experienced crashes, damage, or disability. The MXG/CC, as the commander of the maintenance group, has the authority to select and assign the most suitable person for this role based on their experience and expertise in aircraft recovery operations.

The correct answer is AFTO Form 350, Reparable Item Processing Tag. This form is used for internal control of a repair cycle asset item. It is specifically designed for tracking and documenting the repair process of reparable items. The form includes important information such as the item's identification, condition, and repair status. By using this form, the organization can effectively manage and monitor the repair cycle of asset items, ensuring proper accountability and control.

A digital protractor is a measuring tool that is used to measure angles. It is not designed to measure distance. Distance is typically measured using other tools such as a tape measure or a ruler. Therefore, the digital protractor does not have the capability to measure distance.

When securing widely spaced bolts by the double-twist safetying method, only three bolts may be wired in a series. This method involves using a safety wire to connect adjacent bolts in a crisscross pattern to prevent them from loosening. Since the bolts are widely spaced, it is not possible to wire more than three bolts in a series using this method.

Autorotation is a technique used by pilots during an emergency landing with an engine failure. In this situation, the pilot will initiate autorotation by reducing the pitch of the main rotor blades. This allows the helicopter to descend safely by using the upward flow of air through the rotor blades to maintain lift. By using autorotation, the pilot can control the descent and safely land the helicopter without power from the engine.

When a component weighing five pounds or more is removed or installed, an aircraft weight and balance update is required. This is because adding or removing a significant weight from the aircraft can affect its balance and performance. By updating the weight and balance calculations, the pilot or operator can ensure that the aircraft remains within its safe operating limits and maintains its stability during flight.

When a new main gearbox has been installed and the gearbox historical records cannot be found, it is still considered a condition requiring an aircraft to be weighed and balanced. This is because without the historical records, it is necessary to obtain accurate weight and balance data for the aircraft to ensure safe operation.

General Quarters is a signal that is commonly heard aboard naval vessels to indicate that the crew should prepare for battle stations. It is an emergency signal used to alert the crew to a potential threat or attack. Man Overboard is another emergency signal frequently heard on naval vessels to indicate that someone has fallen overboard and immediate action is required to rescue them. Both General Quarters and Man Overboard are critical signals that are heard most often aboard naval vessels during emergency situations.

The ground refuel/defuel panel (GRDP) operates in the "ON" mode of operation. This means that the panel is active and functioning. It allows for the ground refueling and defueling operations to take place.

Each group of four cells of the wing aux fuel cell system can hold approximately 2015 pounds of JP-8 fuel.

The jettison tube assembly provides an external path for fuel being jettisoned in an emergency. This assembly is specifically designed to safely release and direct the fuel away from the aircraft during a fuel dump procedure. It allows for controlled and efficient fuel jettisoning, reducing the weight of the aircraft in emergency situations.

Dome lights are the type of cabin lights that provide general purpose interior lighting to the passenger compartment cabin area. These lights are typically located on the ceiling of the cabin and provide overall illumination for the entire space. They are designed to be bright enough to ensure visibility and create a comfortable environment for passengers. Dome lights are commonly used in vehicles and aircraft cabins to provide adequate lighting for passengers during their journey.

The inlet particle separator filter assembly filters contain two paper fabric internal throw away filter elements.

During an engine start sequence, a temperature rise should occur within 7 seconds of the igniter energizing before a controlled engine shutdown occurs. This indicates that the ignition process is working properly and the engine is starting up as expected. If the temperature rise does not occur within this timeframe, it may indicate a malfunction or issue with the engine, leading to a shutdown for safety reasons.

The attachment point for the tail wheel assembly on the H60 tail landing gear is the fork assembly. This means that the tail wheel is connected to the landing gear through a fork-shaped component. The fork assembly allows for the tail wheel to pivot and move as needed during landing and taxiing, ensuring stability and maneuverability for the aircraft.

The color of the cockpit floodlights is white and blue.

When safety is integrated effectively into job training, it should be treated as a separate item from the training. This means that safety should not be considered as just another aspect of the training, but rather as a distinct and important component that deserves its own focus and attention. By treating safety as a separate item, individuals are more likely to prioritize it and give it the necessary consideration and importance it deserves. This approach helps to ensure that safety is not overlooked or overshadowed by other training objectives, ultimately leading to a safer and more secure work environment.

The maintenance date documentation (MDD) system is designed to collect, store, and retrieve base-level maintenance data. This means that the system is capable of gathering information related to maintenance activities, storing it in a structured manner, and allowing users to easily access and retrieve this data when needed. The system provides a mechanism for efficiently managing and organizing maintenance data, ensuring that it is readily available for analysis, reporting, and decision-making purposes.

A Category 1 deficiency report must be submitted within 24 hours. This indicates that the report needs to be filed within a day of identifying the deficiency.

A propeller protractor is a special tool used to measure the flight control surfaces in degrees of travel. It is specifically designed to accurately measure the angle of rotation of propellers or other rotating objects. This tool is commonly used in aviation maintenance to ensure that the flight control surfaces are properly aligned and functioning correctly. By using a propeller protractor, technicians can measure the exact degree of movement of these surfaces, allowing for precise adjustments and maintenance procedures.

Gaseous oxygen (GOX) high-pressure cylinders are painted green with a white band near the top. This color scheme is used to easily identify and differentiate oxygen cylinders from other types of cylinders. The green color indicates that the cylinder contains oxygen, while the white band near the top helps to indicate the contents and prevent confusion with cylinders that have a similar color scheme.

The torque effect refers to the tendency of a helicopter to rotate in the opposite direction of its main rotor due to the equal and opposite reaction of the main rotor blades. This is a perfect example of Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In this case, the action is the rotation of the main rotor blades, and the reaction is the rotation of the helicopter in the opposite direction.

The weight of an aircraft is used in determining various design criteria such as engine requirements, wing area, landing gear requirements, and payload capacity. The weight of the aircraft directly affects its performance, fuel efficiency, and overall safety. Therefore, it is crucial to consider the aircraft weight when designing an aircraft to ensure that it meets the necessary requirements and can perform its intended mission effectively.

The correct answer is 60% water and 40% methanol or isopropyl alcohol. This ratio is recommended for cleaning aircraft engines when the outside air temperature is between 5 degrees Fahrenheit and 40 degrees Fahrenheit. This mixture ensures effective cleaning while preventing any damage to the engine components.

The correct answer is HELICOPTER. In a helicopter, the nacelles (engine pods) can be rotated to the vertical position, and the wing (rotor) can be rotated perpendicular to the fuselage, allowing the helicopter to be flight ready. This configuration is necessary for the helicopter to take off and fly. The other options, FULL STOW, AIRPLANE, and EMERGENCY WING STOW, do not accurately describe the configuration mentioned in the question.

Two thirds of the lower portion of the mission auxiliary tank system (MATS) assembly bladder is self-sealing. This means that the majority of the lower portion of the bladder has the ability to seal itself, providing a level of protection against leaks or damage.

The constant frequency generators 1 and 2 are rated at 40 kilovolt ampere (KVA).

The correct answer is blue and orange band of continuous X-formed lattice. This is because the question states that the tape on the nitrogen tubes identifies them with the legend PNEUMATIC and a specific band pattern. The pattern described as a "continuous X-formed lattice" matches the given answer choice. The other options, such as green band followed by rectangle symbols, do not match the description given in the question.

The drive system interface unit sends a signal to the oil pump in order to deliver oil to the low side of the prgb. The oil pump is responsible for pumping the oil and ensuring that it reaches the necessary components for lubrication. By sending a signal to the oil pump, the drive system interface unit ensures that the oil is delivered to the low side of the prgb, effectively lubricating the necessary parts.

Before servicing an H60 landing gear strut with nitrogen, it is important to ensure that there are no hydraulic leaks. This is because hydraulic leaks can compromise the functionality and safety of the landing gear strut. If there are any leaks, they should be addressed and repaired before proceeding with the nitrogen servicing.

Slip clutches are used to control the inputs in case either the yaw or roll trim actuator jams in an H60 helicopter. Slip clutches allow for controlled slippage when excessive torque is applied, preventing damage to the system. This allows the pilot to maintain control over the inputs and make necessary adjustments, ensuring the safe operation of the helicopter.

The natural frequency of an object or component refers to the frequency at which it will vibrate when excited. This means that when an external force or stimulus is applied to the object or component, it will vibrate at its natural frequency. The correct answer, "excited," aligns with this definition as it implies that the object or component needs to be stimulated or energized in order to vibrate at its natural frequency.

The data transfer memory units (DTMU) are available in sizes ranging from 64 to 512 MB. This means that the smallest size for a DTMU is 64 MB and the largest size is 512 MB.

When setting your torque wrench prior to torquing a self-locking nut for a tail drive shaft clamp, you must figure out the nut friction torque and add it to the required torque value. This is because the nut friction torque is the additional force required to overcome the resistance between the nut and the mating surface. By adding it to the required torque value, you ensure that the correct amount of torque is applied to properly secure the nut.

The correct answer is 4:1. This means that for every 4 parts of water, 1 part of soap is used in the engine wash cart. This ratio ensures that there is a sufficient amount of soap to effectively clean the engine while still maintaining a high water content for rinsing.

The engine trailer is customized to each aircraft by installing adapters. Adapters are used to connect different components or systems that may not be directly compatible. In the context of an engine trailer, adapters are likely used to ensure a secure and proper fit between the trailer and the aircraft's engine. This allows for efficient and safe transportation of the engine, as well as ease of installation and removal.

All aircraft fuel servicing/defueling operations will be performed in accordance with Naval Air Systems Command (NAVAIR) 00-80T-109.

Sections A and B are powered by hydraulic system 1, while section C is powered by system 2.

The solid state countdown timer in the emergency egress lighting system control box will maintain the system in an extended operational state for one hour after the power is removed from the aircraft. This means that the emergency egress lighting will continue to function for one hour even without the power supply.

The correct answer is proprotor blade. The proprotor blade is a part of the planetary assembly and is mounted to it. The planetary assembly is a system that allows the proprotor blades to rotate and generate lift, enabling the helicopter to fly. The other options mentioned, such as the cam set plate, blade fold support, and pitch lock mechanism, are not directly related to the mounting of the planetary assembly.

The selected position for the cyclic stick on the H60 helicopter is maintained in the longitudinal axis by the TRIM function. This function helps to adjust the control surfaces and maintain the desired attitude or flight path without the constant input from the pilot. It allows the pilot to set a specific position for the cyclic stick, relieving them from the need to constantly make manual corrections.

The correct answer is the steering command unit. The H60 instrument display system does not have this particular component.

When an H60 damper and reservoir are fully serviced, the indicator will show gold. This suggests that gold is the color used to indicate that the damper and reservoir have been fully serviced.

Special self-retaining bolts are used to connect the flight control components on an H60 helicopter. These bolts are designed to securely hold the components together without the need for additional fasteners or retaining devices. They provide a reliable and efficient connection, ensuring the proper functioning of the flight controls during operation.

The section that may be included and aligned under an aircraft/helicopter maintenance unit is aircraft, specialist, and debrief. This section would be responsible for maintaining and repairing the aircraft, providing specialized expertise for specific tasks, and conducting debrief sessions to analyze and learn from previous operations.

AF Form 797, Job Qualification Standard Continuation/Command JQS, is used to document local or unique training requirements that are not included in the speciality training standard (STS). This form allows for the recording and tracking of additional training that may be necessary for specific job qualifications within the Air Force. It serves as a continuation of the Job Qualification Standard (JQS) and helps ensure that all necessary training is properly documented and completed.

Ground resonance is a helicopter flight characteristic that usually develops during takeoff or landing and when the helicopter/tiltrotor is 87 to 95 percent airborne. Ground resonance occurs when the helicopter's rotor system becomes unbalanced, causing vibrations that can be damaging to the aircraft. It is typically caused by an uneven distribution of weight or a misalignment of the rotor system. Ground resonance can lead to severe oscillations and potential damage to the helicopter if not addressed promptly.