2A652 (Age Journeyman) Volume 4, Edit Code 6

The stair support linkage is the component on the B-1 adjustable aircraft maintenance platform that allows the work platform and steps to remain parallel to the base at any desired platform height. This linkage system is responsible for maintaining the alignment and stability of the platform and steps, ensuring the safety and ease of use for maintenance personnel.

The B-4 adjustable aircraft maintenance platform uses a scissor mechanism to raise and lower the platform. This type of mechanism consists of two crossed beams that pivot at the center, allowing the platform to be raised or lowered by extending or retracting the beams. The scissor mechanism provides stability and strength, making it suitable for supporting heavy loads such as aircraft during maintenance operations.

The correct answer is not move in neutral. When verifying the proper operation of the MHU-83C/E bomblift centering mechanism, the unit should not move in neutral. This means that the centering mechanism should remain stationary when the unit is in neutral position. This is important for ensuring the safety and stability of the bomblift during operation. If the centering mechanism moves in neutral, it could indicate a malfunction or issue with the unit, which would need to be addressed before further use.

The correct answer is operating the hand pump. This is because the backup hydraulic system of the MHU-83C/E bomblift can be checked by manually operating the hand pump. The hand pump is used to manually generate hydraulic pressure in case the main system fails or is not available. By operating the hand pump, the operator can ensure that the backup system is functional and ready to be used if needed.

The chain hoist on the universal jack tester is operated by a control box. This means that the control box is responsible for controlling the movement and operation of the chain hoist. It is likely that the control box contains the necessary controls and mechanisms to control the lifting and lowering of the chain hoist, making it an essential component in the operation of the universal jack tester.

The first step to take if a bomblift starter fails to operate is to check the battery terminals and posts. This is because loose or corroded connections can prevent the starter from receiving the necessary power to operate. By checking and ensuring that the battery terminals and posts are clean and securely connected, any issues related to the power supply can be identified and resolved. This step should be taken before considering replacing the starter, checking the starter cables, or removing and replacing the battery.

The ammeter is a component that measures the flow of current in the electrical system. If the alternator is charging the batteries, it will cause an increase in the current flowing through the system, which will be indicated by the ammeter. Therefore, the ammeter will give a visual indication that the alternator is charging the batteries.

The self-generating nitrogen servicing cart (SGNSC) nitrogen booster compressor should stop at a storage cylinder pressure of 4,400 pounds per square inch gauge (psig).

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Starting aids should never be used to start the New Generation Heater (NGH) as it will result in serious engine damage. This means that using starting aids, such as jump-starting or using additional equipment to assist in starting the NGH, can cause harm to the engine. It is important to avoid using starting aids to prevent any potential damage to the engine.

The correct answer is the unit manufacturer's technical order (TO). This is because the TO provides detailed instructions and procedures for the installation, operation, and maintenance of a specific unit or component. It includes step-by-step instructions on how to conduct tests and inspections, ensuring that the floodlight set is functioning properly. The periodic inspection workcards and service inspection workcards may provide some guidance on inspections but may not have specific procedures for testing a particular component. The illustrated parts breakdown provides information on the individual parts of the floodlight set but does not include test procedures.

The MA-3D air conditioner control switch that allows the operator to control the overall volume of air leaving the unit is the Airflow switch. This switch enables the operator to adjust the speed or intensity of the blower, thus controlling the amount of air being circulated by the air conditioner. The Evaporator and Temperature switches are not specifically designed for controlling the overall volume of air, while the Blower switch is related to the operation of the airflow but does not directly control the overall volume.

Before lowering the ram on the B-6 tripod jack, it is necessary to loosen the ram lock nut. This is because the ram lock nut secures the ram in place, and loosening it allows the ram to move freely and lower down. Tightening the ram lock nut would keep the ram in a fixed position and prevent it from lowering. Closing the relief valve and air vent are not relevant to the process of lowering the ram on the tripod jack.

During the MJ-1B bomblift operational check, it is important that all hydraulic components exhibit a smooth movement with no binding or jumping. This means that there should be no resistance or jerking motion when the components are being operated. This ensures that the bomblift is functioning properly and can safely lift and transport bombs. Any binding or jumping could indicate a malfunction or potential failure in the hydraulic system, which could be dangerous during operations. Therefore, it is crucial to ensure a smooth movement without any binding or jumping for the safety and effectiveness of the bomblift.

The correct answer is 3 feet to a maximum of 7 feet. This means that the B-4 adjustable aircraft maintenance platform can be adjusted to reach a height of at least 3 feet and up to a maximum of 7 feet.

To avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation, it is necessary to permit refrigerant pressure to equalize. This is important because the refrigerant pressure needs to stabilize and equalize before switching between modes to prevent any sudden changes in pressure that could potentially damage the system.

When the MJ-1B engine starts, it is important to check for sufficient oil pressure. Oil pressure is crucial for lubricating the engine's moving parts and ensuring their smooth operation. Without adequate oil pressure, the engine may experience excessive wear and damage, leading to potential failure. Therefore, it is essential to monitor the oil pressure as soon as the engine starts to ensure its proper functioning.

Frosting at the outlet of a component can be an indication of a restriction in a refrigerant system. When there is a restriction, the flow of refrigerant is hindered, causing a decrease in pressure and temperature. This can lead to the formation of frost on the component's outlet as the refrigerant expands and cools rapidly. Therefore, observing frosting at the outlet of a component can help identify a restriction in the refrigerant system.

When servicing the hydraulic cart, a mesh screen is used to prevent large particles in the fluid from entering the reservoir. The mesh screen acts as a filter, allowing only smaller particles and clean fluid to pass through while trapping and preventing larger particles from entering the reservoir. This helps to maintain the cleanliness and integrity of the hydraulic system, preventing potential damage or blockages caused by large particles in the fluid.

The vent valve should be in the closed position when liquid oxygen (LOX) carts are being transported. This is because liquid oxygen is highly volatile and can easily evaporate into a gas. Keeping the vent valve closed prevents any leakage or loss of oxygen during transportation, ensuring the safety and integrity of the LOX carts.

To start the self-generating nitrogen servicing cart (SGNSC), the operator should place the ignition switch in the start position for no more than 10 seconds. This time limit ensures that the cart's engine is given enough time to start without causing any damage or unnecessary wear. Placing the ignition switch in the start position for a longer duration may result in issues such as overheating or draining the battery. Therefore, it is important for the operator to adhere to the recommended time limit of 10 seconds.

The engine safety circuits on the FL-1D floodlight set shutdown the engine by shutting off fuel to the engine. This means that when the engine safety circuits detect a problem or a dangerous situation, they will stop the flow of fuel to the engine, effectively shutting it down. This is a common safety measure in engines to prevent accidents or further damage in case of emergencies.

The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the high pressure pump. The high pressure pump requires a continuous supply of fluid to operate effectively and efficiently. The low pressure pump helps to maintain a consistent flow of fluid to the high pressure pump, ensuring that it can deliver the necessary pressure for various aircraft systems. This helps to maintain the overall performance and functionality of the high pressure pump and the aircraft systems it supports.

In the MA-3D air conditioner, the refrigerant leaving the evaporator coil is in a low-pressure gas state. This is because the evaporator coil is responsible for absorbing heat from the surrounding air, causing the refrigerant to evaporate and turn into a gas. As a gas, the refrigerant has low pressure, which allows it to flow easily through the system and continue the cooling process.

The continuous movement of pressurized hydraulic fluid in the MJ-1B bomblift causes friction, which generates heat. This heat causes the fluid to become heated.

When starting the MA-3D air conditioner, it is necessary to hold the safety override switch until 30 pounds of oil pressure is reached on the engine oil pressure gauge. This is important because the air conditioner relies on the engine oil pressure to function properly. Once the oil pressure reaches the required level, it indicates that the engine is running smoothly and can provide the necessary power for the air conditioner to operate effectively. Releasing the start switch or waiting for the engine to warm up or start are not relevant to ensuring the proper functioning of the air conditioner.

The head adapter assembly of the MD-1 towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear. This means that the head adapter assembly is responsible for connecting the towbar to the nose gear of the aircraft, allowing it to be towed. The screw actuated fork assembly ensures a secure engagement and disengagement of the nose gear, providing stability and control during towing operations.

The purpose of the lift mechanism on the MD-1 tow bar is to raise and lower the wheel assemblies. This means that the lift mechanism is responsible for lifting the wheels of the aircraft off the ground or lowering them back onto the ground as needed. This is an important function as it allows for easy maneuverability and transportation of the aircraft using the tow bar.

Fluid under the unit is the most obvious and easiest way of isolating most hydraulic malfunctions. This is because if there is fluid leaking under the unit, it indicates a problem with the hydraulic system. Leaks can occur due to damaged hoses, seals, or fittings, and they can cause a loss of hydraulic pressure and affect the operation of the system. Therefore, identifying fluid under the unit can help pinpoint the source of the malfunction and allow for necessary repairs to be made.

The correct answer is 5 because the hydrostatic test is due on the receiver tank of a MC-20 air compressor every 5 years.

The proper level in the self-generating nitrogen servicing cart (SGNSC) hydraulic reservoir is 1/2 inch below the top of the glass. This means that the hydraulic fluid should be filled up to this level, ensuring that there is enough fluid for proper operation without overfilling the reservoir.

The warming door is responsible for maintaining the temperature inside the self-generating nitrogen servicing cart (SGNSC) during cold weather operating conditions. If the warming door is not lowered, it can result in lower temperatures inside the cart, which can affect the nitrogen purity. This is because colder temperatures can cause condensation and freezing of moisture, which can contaminate the nitrogen and lower its purity. Therefore, the probable cause of the malfunction is the warming door not being lowered for cold weather operating conditions.

The reservoir selector valve must be in the AIRCRAFT position when filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand. This position allows the hydraulic fluid to be drawn from the aircraft's hydraulic system, ensuring that the test stand is properly filled and bled.

The correct answer is Fill switch, LS4. This switch provides an alternate means of energizing the fill pump when either of the micro switches are defective. It serves as a backup switch to ensure that the fill pump can still be activated even if the micro switches fail.

Repairing ground heater equipment without accurate technical data can be dangerous and may result in further damage or injury. It is important to have the necessary information and instructions before attempting any repairs to ensure the proper procedures are followed. Consulting the operator or supervisor may provide some guidance, but without accurate technical data, the repair should not be attempted.

To verify a malfunction in a FL-1D floodlight set, the best course of action is to operate the unit. By turning on the floodlight and observing its performance, any issues or malfunctions can be identified. This method allows for a direct assessment of the unit's functionality and can help in determining the specific problem that needs to be addressed. Analyzing the problem, performing a service inspection, and giving probable causes can be done after operating the unit to further diagnose and troubleshoot the malfunction.

Sensible heat refers to the heat that can be felt and added or subtracted to a substance without changing its state. It is the heat that causes a change in temperature of a substance, without causing it to change from a solid to a liquid or from a liquid to a gas. This type of heat is easily detectable and can be measured using a thermometer. Super heat refers to the heat added to a substance above its boiling point, latent heat refers to the heat absorbed or released during a phase change, and specific heat refers to the amount of heat required to raise the temperature of a substance by a certain amount.

A good refrigerant will operate in low to moderate pressure because high pressure can put stress on the system and increase the risk of leaks or damage. Additionally, low to moderate pressure allows for more efficient heat transfer and better performance of the refrigeration system.

The counterbalance valve prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure. It is designed to provide a controlled flow of fluid from the rod side of the cylinder to the cap side, allowing the arms to lower smoothly and safely in case of pressure loss. This valve helps maintain stability and prevents sudden drops or collapses, ensuring the safety of the bomblift system.

The cradle lift arm control valve is used to slowly raise or lower the MJ-1B bomblift lift arms. This valve allows for precise control and adjustment of the lift arms, ensuring smooth and accurate movement. It is specifically designed for controlling the lift arms of the bomblift and is the most suitable option for this purpose.

The correct answer is "receiver outlet valve." The receiver is a storage tank in a refrigeration system where the refrigerant is stored. The receiver outlet valve is responsible for controlling the flow of refrigerant out of the receiver. When the system needs to remove refrigerant, it is done through the receiver outlet valve. This valve allows the refrigerant to be directed to the appropriate location in the system, such as the condenser or other components.

The expansion turbine is the component of the A/M32C-10D air conditioner that extracts energy from bleed air on the air cycle machine. This turbine is responsible for expanding the high-pressure air from the compressor and converting its energy into mechanical work. This work is then used to drive the air cycle machine and provide cooling to the aircraft. The expansion turbine plays a crucial role in the overall functioning of the air conditioner system by extracting energy from the bleed air and using it to cool the aircraft's cabin.

To precharge the PMU-29/E oil cart supply tank, the valve handle should be placed in the BYPASS position. This allows the oil to bypass the tank and flow directly into the system, ensuring that the tank is properly pressurized before use. The other options, OPEN, OFF, and ON, do not pertain to the precharging process and are therefore incorrect.

A basic rotary compressor uses a sliding barrier to prevent air from leaving the discharge port while the intake port is taking air in. The sliding barrier acts as a seal between the two ports, ensuring that the compressed air flows in the desired direction and does not escape prematurely. This mechanism helps maintain the efficiency and effectiveness of the compressor by controlling the air flow and preventing any loss of pressure.

The correct answer is "forms a seal between the vanes and the stator." In a rotary vane compressor, oil is used to create a seal between the vanes and the stator. This seal is necessary to prevent leakage of compressed air and to ensure efficient operation of the compressor. The oil fills the gaps between the vanes and the stator, creating a barrier that allows the vanes to move smoothly and maintain a tight seal. Without this oil, the compressor would not be able to generate the necessary pressure and efficiency would be compromised.

The MC-20 air compressor provides low pressure air for pneumatic tools and tire inflation. This means that it produces air at a lower pressure level, which is suitable for tasks that require less force and precision. Low pressure air is commonly used for inflating tires, as well as operating various pneumatic tools such as nail guns and paint sprayers.

The air compressor in the self-generating nitrogen servicing cart (SGNSC) is categorized as high-pressure. This means that it is capable of producing air at a high pressure level, which is necessary for certain applications such as filling high-pressure nitrogen cylinders or servicing aircraft systems that require high-pressure air.

The oil pressure switch is the correct answer because it is a safety device in the MJ-2A-1 hydraulic test stand engine system that sounds the warning horn when there is a malfunction in the engine system. This switch monitors the oil pressure and triggers the horn to alert the operator if the pressure drops below a certain level, indicating a potential problem with the engine. The other options, such as the water level switch, fuel level indicator, and fuel pressure switch, are not directly related to monitoring engine system malfunctions or sounding warning horns.

When setting up the MJ-2A-1 hydraulic test stand controls for operation, the valve that must be opened is the return system bypass. This valve allows the hydraulic fluid to bypass the system and return directly to the reservoir. By opening this valve, any excess pressure in the system can be relieved, ensuring safe and efficient operation of the test stand controls.

The correct answer is 250 and 500. This means that the davit on the split deck maintenance platform has two lifting capacities: 250 pounds and 500 pounds.