2A652 Age Journeyman Volume 4, Edit Code 6 Quiz

A mesh screen is used to prevent large particles in the fluid from entering the reservoir when servicing a hydraulic cart. This screen acts as a filter, allowing only smaller particles and clean fluid to pass through while blocking larger debris. This helps to maintain the cleanliness and integrity of the hydraulic system, preventing damage and ensuring proper functioning of the cart. A line filter, check valve, and relief valve serve different purposes in a hydraulic system and do not specifically prevent large particles from entering the reservoir.

Repairing ground heater equipment can be a complex task that requires accurate technical data. Without this data, attempting to repair the equipment can lead to further damage or even injury. Therefore, it is important to have access to accurate technical data before attempting any repairs on ground heater equipment.

The B-4 adjustable aircraft maintenance platform uses a scissor mechanism to raise and lower the platform. This type of mechanism consists of a series of connected bars that pivot, allowing the platform to move up and down in a controlled manner. The scissor mechanism is commonly used in various applications where vertical movement is required, such as lifting platforms and scissors lifts.

Prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D floodlight set, the tow bar must be positioned to the left or right. This is necessary to ensure that the mast is stable and properly aligned during the raising or lowering process. By positioning the tow bar to the left or right, it provides support and stability to the mast, preventing any potential damage or accidents.

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 for the ram to move freely and be lowered. Tightening the ram lock nut would prevent the ram from being lowered, while closing the relief valve and air vent are unrelated to the action of lowering the ram.

During the MJ-1B bomblift operational check, it is expected that all hydraulic components should move smoothly without any binding or jumping. This means that there should be no resistance or jerky movements when the components are being operated. The absence of binding or jumping ensures that the hydraulic system is functioning properly and that there are no obstructions or malfunctions that could affect the lift's performance.

The counterbalance valve prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure. It is designed to provide a back pressure that opposes the weight of the load, ensuring that the arms remain in the lifted position even if there is a loss of hydraulic pressure. This valve helps to maintain the stability and safety of the bomblift system.

The correct answer is "fluid under the unit." This is because if there is fluid leaking or pooling under the hydraulic unit, it indicates a malfunction or a leak in the system. This can help identify the source of the problem and allow for necessary repairs or maintenance to be performed. Slow operation, erratic operation, and movement when the control valve is not actuated can also be indicators of hydraulic malfunctions, but fluid under the unit is the most obvious and easiest to identify.

The correct answer is the unit manufacturer's technical order (TO). This is because the technical order contains detailed instructions and procedures for the maintenance and operation of a specific unit or component. It provides step-by-step guidance on how to perform tests and inspections on the FL-1D floodlight set. The periodic inspection workcards and service inspection workcards may provide some information on testing procedures, but they may not be as comprehensive or specific as the unit manufacturer's technical order. The illustrated parts breakdown is a visual representation of the components and parts of the floodlight set and does not provide instructions for testing procedures.

The hydrostatic test is due on the receiver tank of a MC-20 air compressor every 5 years. This means that after every 5 years, the tank needs to undergo a hydrostatic test to check for any leaks or weaknesses. This is important to ensure the safety and efficiency of the air compressor.

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 off the ground or lowering them back onto the ground when needed. This is an important function as it allows for easier movement and towing of the aircraft. The lift mechanism ensures that the wheels are properly positioned and can be adjusted as necessary for safe and efficient transportation of the aircraft.

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).

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 allows the user to adjust the speed and intensity of the air being blown out by the air conditioner, giving them control over the airflow in the room. The blower switch controls the fan speed, the evaporator switch controls the cooling process, and the temperature switch controls the desired temperature. However, none of these switches specifically control the overall volume of air leaving the unit like the airflow switch does.

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 to prevent any further damage or accidents that could occur if the engine continues to run.

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 in the event of an engine system malfunction. When the oil pressure drops below a certain level, the switch activates the horn to alert the operator of the issue. This is important for ensuring the safe operation of the test stand and preventing any potential damage or accidents that may occur due to engine system malfunctions.

The compressor displacement refers to the volume of air that the compressor can move in a given time. When the ACE 802S air conditioner compressor is in the HOLD position, it means that the compressor is not actively compressing or moving air. Therefore, the compressor displacement remains constant, as there is no change in the volume of air being moved.

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 impeded, causing a drop in pressure and temperature. This drop in temperature can cause moisture in the air to freeze and form frost on the outlet of the component. Therefore, the presence of frosting can help identify a restriction in the system.

To check the MHU-83C/E bomblift backup hydraulic system, the correct action is to operate the hand pump. This is because the hand pump is used to manually pressurize the system and ensure that it is functioning properly. Closing the shutoff valve would prevent the flow of hydraulic fluid, closing the air bleed valve would release any trapped air in the system, and operating the system pump would rely on the main hydraulic system instead of the backup system. Therefore, operating the hand pump is the most appropriate action to check the backup hydraulic system.

The ammeter is the component that will give a visual indication that the alternator is charging the batteries. An ammeter measures the current flowing through the electrical system, and when the alternator is charging the batteries, it will show a positive current reading on the ammeter. This indicates that the alternator is supplying power to the batteries and charging them. The voltmeter measures the voltage in the system, but it does not directly indicate whether the alternator is charging the batteries. Bright headlights and control panel lights are not directly related to the charging of the batteries.

The stair support linkage on the B-1 adjustable aircraft maintenance platform allows the work platform and steps to remain parallel to the base at any desired platform height. This component ensures that the platform is stable and level, providing a safe working environment for maintenance personnel. The base assembly provides the foundation for the platform, the upper platform is the work surface, and the hydraulic cylinder assembly allows for height adjustment. However, it is the stair support linkage that specifically controls the parallel alignment of the platform and steps.

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 start the NGH can cause harm to the engine. It is important to avoid using starting aids to prevent any potential damage to the engine.

To verify if a malfunction exists in a FL-1D floodlight set that comes in with a write-up, the best course of action is to operate the unit. By turning on the floodlight set and observing its performance, any malfunction or issue can be identified. This allows for a practical assessment of the unit's functionality and helps in determining the cause of the problem. Analyzing the problem, performing a service inspection, and giving several probable causes can be done after operating the unit to further diagnose and address the malfunction.

Oil in a rotary vane compressor forms a seal between the vanes and the stator. This is important because it prevents leakage of compressed gases and ensures efficient compression. The oil fills the small gaps between the vanes and the stator, creating a tight seal that allows the compressor to build up pressure effectively. Without this seal, there would be significant loss of compressed gases, leading to reduced performance and efficiency of the compressor.

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. The pressure from the jack, beam assembly, and load cell may have other functions or roles in the operation of the universal jack tester, but they are not directly responsible for operating the chain hoist.

The refrigerant leaving the evaporator coil in the MA-3D air conditioner is in a low-pressure gas state. This is because the evaporator coil is responsible for absorbing heat from the surroundings, causing the refrigerant to evaporate and turn into a gas. As a result, the refrigerant exits the evaporator coil as a low-pressure gas, ready to be compressed and condensed in the next stage of the cooling process.

The continuous movement of pressurized hydraulic fluid in the MJ-1B bomblift causes the fluid to become heated. As the fluid is pressurized and flows through the system, it experiences friction and resistance, which generates heat. This heat is transferred to the fluid, causing it to become heated.

Sensible heat refers to the heat that can be felt and added or subtracted to a substance without changing its state. This means that the temperature of the substance can be directly measured and sensed. Superheat 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. Therefore, the correct answer is sensible heat.

If a bomblift starter fails to operate, the first step that should be taken is to check the battery terminals and posts. This is because loose or corroded terminals 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 power supply can be addressed before considering other potential causes such as a faulty starter or cables.

The air compressor in the self-generating nitrogen servicing cart (SGNSC) is categorized as high-pressure because it is designed to generate and store nitrogen at high pressures. This is necessary for servicing aircraft systems that require nitrogen at high pressures, such as hydraulic systems and landing gear. The high-pressure air compressor ensures that an adequate supply of nitrogen is available at the required pressure levels for efficient and safe aircraft maintenance.

The most probable cause for the split deck maintenance platform not lowering could be a defective control cable. This is because a defective control cable can prevent the platform from receiving the necessary instructions to lower. Corroded battery cables could also be a potential cause, but it is less likely as it would affect the overall operation of the platform rather than just the lowering function. The main disconnect switch being ON or the engine switch being in the RUN position are unrelated to the issue of the platform not lowering.

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 system to be connected to the aircraft's hydraulic system, enabling the transfer of fluid between the two systems. It ensures that the correct fluid is being used and that any air trapped in the system can be properly bled out.

The correct answer is precision tolerances. The hydraulic test stand high pressure pump is difficult to repair because it requires precise measurements and alignments. Any slight deviation from the specified tolerances can result in malfunctioning or failure of the pump. Therefore, repairing it requires a high level of expertise and precision to ensure that all parts are properly calibrated and aligned.

The Fill switch, LS4, provides an alternate means of energizing the fill pump when either of the micro switches are defective. This means that if either of the micro switches fail, the Fill switch can still be used to activate the fill pump.

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 indicates that the engine has sufficient oil pressure to operate effectively. Once this pressure is reached, it is safe to release the start switch and proceed with starting the engine.

The purpose of the MJ-2A-1 hydraulic test stand fill-and-bleed system is to purge entrapped air before operation. This means that the system is designed to remove any air that may be trapped within the hydraulic system before it is put into operation. This is important because air bubbles can cause issues with the performance and operation of the hydraulic system, so it is necessary to remove them before use.

If the air intake of the AF/M32T-1 cabin leakage tester is restricted, it would result in low blower output. This means that the tester would not be able to generate sufficient airflow, which could affect its ability to accurately measure cabin leakage.

The throttle assembly is responsible for providing manual speed adjustment on the AF/M32T-1 cabin leakage tester. This component controls the flow of fuel to the engine, allowing the operator to adjust the speed of the tester as needed. The tachometer measures the speed of the engine, but it does not directly provide manual speed adjustment. The diesel engine and fuel system relief valve are not directly involved in the manual speed adjustment process.

When liquid oxygen (LOX) carts are being transported, the vent valve should be in the closed position. This is important to prevent any leaks or spills of the highly volatile and potentially dangerous liquid oxygen. Closing the vent valve ensures that the cart is properly sealed and secure during transportation, minimizing the risk of accidents or incidents.

The MC-20 air compressor provides low pressure air for pneumatic tools and tire inflation. This means that it delivers air at a lower pressure, which is suitable for tasks that require less force or power. Low pressure air is commonly used for tasks such as inflating tires, operating pneumatic tools like nail guns or paint sprayers, and other applications where high pressure is not necessary.

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The probable cause of the malfunction is that the warming door is not lowered for cold weather operating conditions. This is because the question states that the nitrogen purity does not reach 95.5 percent within 30 minutes while the engine is running at 3,000 rpm. The warming door is responsible for maintaining the appropriate temperature inside the self-generating nitrogen servicing cart (SGNSC), and if it is not lowered during cold weather, it can lead to a decrease in nitrogen purity.

As soon as the MJ-1B engine starts, it is important to check for sufficient oil pressure. This is because oil pressure is crucial for the proper lubrication and functioning of the engine. Without sufficient oil pressure, the engine may experience excessive friction and wear, leading to potential damage or failure. Therefore, monitoring the oil pressure is a critical step to ensure the engine's performance and longevity.

A good refrigerant needs to operate in low to moderate pressure in order to efficiently transfer heat and cool the surrounding area. Operating in high pressure can lead to safety concerns and potential damage to the refrigeration system. Additionally, operating in low to moderate pressure allows for better control of the refrigerant flow and ensures optimal performance of the refrigeration system.

The engine switch is placed in the RUN position to energize the electric fuel pump, fuel solenoid, and regulator on the split deck maintenance platform. This position allows the engine to receive fuel and start running. The MODE, START, and DRIVE positions are not relevant for this purpose.

The ACE 802S air conditioner heat boost system uses engine coolant to trim the output air temperature. Engine coolant is a liquid that circulates through the engine and absorbs heat, which can then be used to regulate the temperature of the air being released by the air conditioner. This allows for precise control and adjustment of the output air temperature.

When engaging the compressor in an ACE 802S air conditioner, it is important to hold the compressor switch in the HOLD position. This is done to allow the compressor oil and discharge pressures to stabilize. By holding the switch in the HOLD position, it ensures that the oil and pressure within the compressor have reached a stable state before engaging the compressor fully. This helps to prevent any sudden surges or fluctuations in the oil and pressure levels, which could potentially damage the compressor or affect its performance.

The purpose of the MHU-83C/E bomblift rear control shutoff valve is to cut off fluid flow through the rear control valves. This means that when the valve is closed, it prevents fluid from flowing through the rear control valves, effectively shutting off the flow of hydraulic fluid to the rear control system. This could be necessary in certain situations, such as when maintenance or repairs need to be done on the rear control system, or when the system needs to be temporarily disabled for safety reasons.

The correct answer is "not move in neutral." This means that when verifying the proper operation of the MHU-83C/E bomblift centering mechanism, the unit should not move when it is in the neutral position. This is important because the neutral position is supposed to keep the unit stationary, and if it moves in neutral, it indicates a malfunction or improper operation of the centering mechanism.

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 when switching from COOLING to HEATING mode, there may be a pressure difference in the refrigerant system. Allowing the pressure to equalize ensures that there is no excessive pressure buildup or sudden changes in the system, which could potentially lead to damage.

The correct answer is volume control. The output volume of the hydraulic test stand high pressure pump is controlled by the volume control. This means that the pump's output can be adjusted by manipulating the volume control, allowing for precise control over the amount of fluid being pumped per minute. The other options, flow control valve, compensator control, and flowmeter assembly, may play a role in the overall hydraulic system but they do not directly control the output volume of the pump.