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CDC 2A652N - Volume 4 - Common AGE Systems

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CDC 2A652N - Volume 4 - Common AGE Systems

CDC 2A652N - Volume 4 - Common AGE Systems

Question 1 of 85

1

What component on the New Generation Heater activates the HCU?

Select one of the following:

  • Oil pressure switch

  • Burner control unit

  • Heat control switch

  • Thermostatic sensor

Explanation

Question 2 of 85

1

The HCU on the New Generation Heater starts the main air fan for output air when

Select one of the following:

  • A heat setting is selected

  • Constant flame is established

  • The temperature gauge reads COOL

  • The inside temperature reaches 140°F

Explanation

Question 3 of 85

1

When should you use starting aids to start the New Generation Heater?

Select one of the following:

  • During the engine start up with the ignition switch in PREHEAT position

  • Never, as it will result in serious engine damage

  • When the temperature gauge reads COOL

  • When ambient temperature is below 32°F

Explanation

Question 4 of 85

1

Repair of ground heater equipment should never be attempted

Select one of the following:

  • Without first talking with the operator

  • Without first consulting your supervisor

  • Unless accurate technical data is available

  • Unless in the presence of an experienced mechanic

Explanation

Question 5 of 85

1

The amount of heat required to raise the temperature of one pound of a substance one degree Fahrenheit is known as

Select one of the following:

  • British thermal unit

  • Sensible heat

  • Specific heat

  • Latent heat

Explanation

Question 6 of 85

1

Heat that can be felt and added or subtracted to a substance without changing its state is called

Select one of the following:

  • Super heat

  • Latent heat

  • Specific heat

  • Sensible heat

Explanation

Question 7 of 85

1

Heat added to gaseous substance is known as

Select one of the following:

  • Sensible heat

  • Specific heat

  • Super heat

  • Latent heat

Explanation

Question 8 of 85

1

The relationship between pressure and the boiling point of a liquid is seen when

Select one of the following:

  • Pressure increases, it raises the boiling point

  • Pressure increases, it lowers the boiling point

  • The boiling point increases, it raises the pressure

  • The boiling point increases, it lowers the pressure

Explanation

Question 9 of 85

1

The factors that have the greatest bearing on the temperature of a refrigerant are the boiling of a liquid and the amount of heat applied and the

Select one of the following:

  • Temperature of the vapor

  • Type of heat transfer

  • Moisture in the air

  • Pressure applied

Explanation

Question 10 of 85

1

What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?

Select one of the following:

  • Blower control switch

  • Airflow control switch

  • Evaporator control switch

  • Temperature control switch

Explanation

Question 11 of 85

1

What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?

Select one of the following:

  • Liquid refrigerant.

  • Gaseous refrigerant

  • Pure water solution

  • Ethylene glycol/water solution

Explanation

Question 12 of 85

1

Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a

Select one of the following:

  • Low pressure gas

  • High pressure gas

  • Low pressure liquid

  • High pressure liquid

Explanation

Question 13 of 85

1

After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the

Select one of the following:

  • Heatsink coils

  • Condenser coils

  • Evaporator coils

  • Receiver inlet valve

Explanation

Question 14 of 85

1

When starting the MA-3D air conditioner, hold the safety override switch until

Select one of the following:

  • 30 psi oil pressure is registered on the engine oil pressure gauge

  • You release the start switch

  • The engine warms up

  • The engine starts

Explanation

Question 15 of 85

1

What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?

Select one of the following:

  • Air cooler fan

  • Air volume controller

  • Temperature controller

  • Temperature control knob

Explanation

Question 16 of 85

1

What component on the MA-3D air conditioner shuts off the compressor when the suction pressure drops below 5 psi?

Select one of the following:

  • Low pressure cutout

  • High pressure cutout

  • Temperature controller

  • Temperature control switch

Explanation

Question 17 of 85

1

What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?

Select one of the following:

  • Inward leaks

  • Vacuum leaks

  • Pressure leaks

  • Outward leaks

Explanation

Question 18 of 85

1

When performing refrigerant recovery, be sure

Select one of the following:

  • To use vacuum pumps

  • To use the HCU

  • The output air is between 150°F – 185°F

  • The refrigerant has become a low-pressure vapor for compressor use

Explanation

Question 19 of 85

1

The air cycle machine of an A/M32C–10D air conditioner consists of

Select one of the following:

  • An air compressor fan only

  • An expansion turbine only

  • A heat exchanger and an expansion turbine

  • An expansion turbine and a compressor fan

Explanation

Question 20 of 85

1

The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the

Select one of the following:

  • Compressor

  • Heat exchanger

  • Expansion turbine

  • Temperature controller

Explanation

Question 21 of 85

1

The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to

Select one of the following:

  • Ensure the engine is at governed speed before engaging compressor.

  • Allow the oil and discharge pressures to stabilize.

  • Defrost the evaporator.

  • Build-up oil pressure.

Explanation

Question 22 of 85

1

What action occurs in the evaporator of the ACE 802S air conditioner?

Select one of the following:

  • Condensing refrigerant absorbs heat from the air stream.

  • Boiling refrigerant absorbs heat from the air stream.

  • Condensing refrigerant loses heat to the air stream.

  • Boiling refrigerant loses heat to the air stream.

Explanation

Question 23 of 85

1

What system on the ACE 802S air conditioner “supercharges” the compressor?

Select one of the following:

  • Defrost

  • Heat boost

  • Vapor injection

  • Liquid injection

Explanation

Question 24 of 85

1

What valve must be opened prior to starting the engine on the ACE 802S?

Select one of the following:

  • Air shutoff

  • Fuel shutoff

  • Coolant control

  • Refrigerant flow

Explanation

Question 25 of 85

1

What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?

Select one of the following:

  • Permit refrigerant pressure to equalize.

  • Perform maximum refrigerant pump down.

  • Place heating/cooling switch in HEATING position.

  • Place the reversing valve lever in the HEATING position.

Explanation

Question 26 of 85

1

In troubleshooting, what is the first step that must be completed when a unit comes in with a write-up in the forms?

Select one of the following:

  • Isolate the problem.

  • Perform a service inspection.

  • Perform an operational check.

  • Recognize the write-up as a malfunction.

Explanation

Question 27 of 85

1

How can a restriction in a refrigerant system be identified?

Select one of the following:

  • Frosting at the outlet

  • Sweating of the outlet

  • Increased suction pressure

  • Loosen fittings to check flow

Explanation

Question 28 of 85

1

Oil in the rotary vane compressor

Select one of the following:

  • Lubricates the connecting rods

  • Has high viscosity and is very inflammable

  • Forms a seal between the vanes and the stator

  • Permits it to be typed as a high pressure unit

Explanation

Question 29 of 85

1

What provides pressurized oil to the rotor blades of the MC-2A rotary sliding vane compressor?

Select one of the following:

  • Hollow-ported bolt

  • Drilled passages

  • Rotor shaft

  • Stator shaft

Explanation

Question 30 of 85

1

On the MC-2A rotary sliding vane compressor, the minimum pressure valve does all of the following except

Select one of the following:

  • Ensure minimum pressure within the oil chamber.

  • Ensure minimum pressure to the condensate drain.

  • Prevent receiver air from flowing back to the compressor by working as a check valve.

  • Increase the efficiency of the felt pads by ensuring they receive a constant minimum air pressure.

Explanation

Question 31 of 85

1

What medium is used to cool the MC-2A rotary vane compressor?

Select one of the following:

  • Oil

  • Air

  • Water

  • Hydraulic fluid

Explanation

Question 32 of 85

1

What is the air output of the MC-2A rotary sliding vane compressor?

Select one of the following:

  • High volume, high pressure

  • High volume, low pressure

  • Low volume, high pressure

  • Low volume, low pressure

Explanation

Question 33 of 85

1

The valves on a reciprocating compressor are operated by

Select one of the following:

  • Atmospheric pressure

  • Electrical input

  • Oil pressure

  • Pushrods

Explanation

Question 34 of 85

1

Oil-moisture traps are required on a multi-stage reciprocating compressor to

Select one of the following:

  • Cool the compressed air

  • Ensure even compression of the air

  • Introduce moisture to the compressed air

  • Remove moisture from the compressed air

Explanation

Question 35 of 85

1

During an inspection on an LN2 cart, you should look at all of the following except the

Select one of the following:

  • Brake assembly

  • Engine oil level

  • Unit for cleanliness

  • Front end alignment

Explanation

Question 36 of 85

1

When LOX carts are being transported, what position should the vent valve be in?

Select one of the following:

  • Tow

  • Closed

  • Opened

  • Transport

Explanation

Question 37 of 85

1

How is the air compressor in the SGNSC categorized?

Select one of the following:

  • High-pressure

  • Low-pressure

  • High volume

  • Low volume

Explanation

Question 38 of 85

1

What component on the SGNSC removes nitrogen from the ambient air?

Select one of the following:

  • Filters

  • Carbon absorber

  • Booster compressor

  • Separation membrane

Explanation

Question 39 of 85

1

To start the SGNSC, the operator must place the ignition switch in the start position for no more than

Select one of the following:

  • 5 seconds

  • 10 seconds

  • 15 seconds

  • 20 seconds

Explanation

Question 40 of 85

1

At what storage cylinder pressure, in psig, should the SGNSC nitrogen booster compressor stop?

Select one of the following:

  • 2400 psig

  • 4100 psig

  • 4400 psig

  • 6400 psig

Explanation

Question 41 of 85

1

The proper level of the gauge of the hydraulic reservoir should be

Select one of the following:

  • 2/3 to 3/4 inch from the bottom of the glass

  • 2/3 to 3/4 inch from the top of the glass

  • 1/2 inch from the bottom of the glass

  • 1/2 inch from the top of the glass

Explanation

Question 42 of 85

1

During an operational check of an SGNSC you find that the engine starts, is running at 3,000 rpm, but the nitrogen purity does not reach 95.5% within 30 minutes. What is a probable cause of this malfunction?

Select one of the following:

  • Warming door is not lowered for cold weather operating conditions

  • Low oil level in the feed air compressor lubricant separator tank

  • Booster compressor defective

  • Poor air ventilation

Explanation

Question 43 of 85

1

What is important to keep in mind when performing maintenance on the SGNSC?

Select one of the following:

  • Weather conditions

  • Wind direction

  • Ventilation

  • Safety

Explanation

Question 44 of 85

1

When filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand, the reservoir selector valve must be in the

Select one of the following:

  • Open position

  • Stand position

  • Aircraft position

  • External position

Explanation

Question 45 of 85

1

The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the

Select one of the following:

  • Relief valves

  • Aircraft pumps

  • Low pressure filters

  • High pressure pump

Explanation

Question 46 of 85

1

In the MJ-2A-1 hydraulic test stand, the output volume of the high pressure pump is controlled by the

Select one of the following:

  • Volume control

  • Flow control valve

  • Compensator control

  • Flowmeter assembly

Explanation

Question 47 of 85

1

If the position of the reservoir selector valve is changed in the hydraulic test stand during operation, the operator may cause the

Select one of the following:

  • Flowmeter to be damaged

  • Aircraft reservoir to overfill

  • Flow control valve seals to rupture

  • Return system pressure to decrease

Explanation

Question 48 of 85

1

What engine system safety device on the MJ-2A-1 hydraulic test stand sounds the warning horn in the event of an engine system malfunction?

Select one of the following:

  • Water level switch

  • Oil pressure switch

  • Fuel level indicator

  • Fuel pressure switch

Explanation

Question 49 of 85

1

When setting the controls for operation of the MJ-2A-1 hydraulic test stand, what control must you set in the OPEN position?

Select one of the following:

  • Compensator control valve

  • Return system bypass valve

  • Supply shut-off valve

  • System selector valve

Explanation

Question 50 of 85

1

When filling and bleeding the MJ-2A-1 hydraulic test stand, the system should be pressurized and bled until

Select one of the following:

  • A solid line of fluid can be seen in the sight tube.

  • The sight tube is filled with bubbles.

  • Sight tube fluid turns a milky color.

  • Sight tube fluid is blue in color.

Explanation

Question 51 of 85

1

What is the most important logical step in troubleshooting a malfunction?

Select one of the following:

  • Analysis

  • Isolation

  • Recognition

  • Verification

Explanation

Question 52 of 85

1

When a line is to be disconnected you

Select one of the following:

  • Ensure there is no pressure in the system.

  • Replace it with the same type of line.

  • Mark the location of the line.

  • Seal all openings.

Explanation

Question 53 of 85

1

The volume of oil delivered from the variable displacement hydraulic pump to the fixed displacement hydrostatic motor of the MJ-1B bomblift determines the

Select one of the following:

  • Direction of movement of the lift arms

  • Speed of movement of the lift arms

  • Direction of movement of the truck

  • Speed of movement of the truck

Explanation

Question 54 of 85

1

What prevents over pressurization of the steering system of the MJ-1B bomblift?

Select one of the following:

  • Bleed valve

  • Relief valve

  • Bypass valve

  • Pressure regulator

Explanation

Question 55 of 85

1

What valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?

Select one of the following:

  • Air bleed

  • Rotary by-pass.

  • Counterbalance

  • Over pressurization

Explanation

Question 56 of 85

1

As soon as the engine of the MJ-1B starts, you should check for sufficient

Select one of the following:

  • Hydraulic pressure

  • Battery charging

  • Fuel pressure

  • Oil pressure

Explanation

Question 57 of 85

1

During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit

Select one of the following:

  • A smooth movement with no binding or no jumping

  • Fast steady movements with minimal jumping

  • Some settling once the actuator is released

  • Small amounts of residue

Explanation

Question 58 of 85

1

What is the purpose of the rear control shutoff valve on the MHU-83C/E bomblift?

Select one of the following:

  • Isolates the brake valve

  • Isolates the counterbalance valve

  • Cuts off fluid through the hydrostatic drive

  • Cuts off fluid through the rear control valves

Explanation

Question 59 of 85

1

What component on the MHU-83C/E bomblift supplies the brake valve and calipers with fluid?

Select one of the following:

  • System pump

  • Steering pump

  • Transmission pump

  • Hydraulic system control valve

Explanation

Question 60 of 85

1

When verifying the proper operation of the centering mechanism on the MHU-83C/E bomblift, the unit should

Select one of the following:

  • Start in reverse

  • Move in neutral

  • Not start in reverse

  • Not move in neutral

Explanation

Question 61 of 85

1

You check the backup hydraulic system on the MHU-83C/E bomblift by

Select one of the following:

  • Closing the shutoff valve

  • Operating the hand pump

  • Closing the air bleed valve

  • Operating the system pump

Explanation

Question 62 of 85

1

If there is a discrepancy between the workcards and TO, you should refer to

Select one of the following:

  • The TO

  • The workcards

  • Your supervisor

  • Both the TO and workcards

Explanation

Question 63 of 85

1

How do you check the shift lock lever for proper operation?

Select one of the following:

  • An audible click will be heard and the locking lever will move downward.

  • The unit will not move in reverse and an audible click will be heard.

  • Locking lever will move upward and an audible click will be heard.

  • The unit starts and moves in both directions.

Explanation

Question 64 of 85

1

When troubleshooting the electrical system on the MJ-1B bomblift, what component will give you a visual indication that the alternator is charging?

Select one of the following:

  • Ammeter

  • Voltmeter

  • Head light

  • Control panel light

Explanation

Question 65 of 85

1

The engine safety circuits on the FL-1D shutdown the engine by

Select one of the following:

  • Opening the fuel solenoid

  • Closing the engine intake air

  • Shutting off fuel to the engine

  • Tripping the protective circuit breaker

Explanation

Question 66 of 85

1

What is used to raise the mast on the FL-1D?

Select one of the following:

  • Screw mechanism

  • Pneumatic controls

  • Hydraulic cylinder

  • Hand-operated cable

Explanation

Question 67 of 85

1

What must you do prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D?

Select one of the following:

  • Secure all doors

  • Warm-up the engine

  • Set the master control switch to ON

  • Position the towbar to the left or right

Explanation

Question 68 of 85

1

When a unit comes in with a write-up, how do you verify a malfunction exists?

Select one of the following:

  • Operate the unit

  • Analyze the problem

  • Perform a service inspection

  • Give several probable causes

Explanation

Question 69 of 85

1

Where can you find test procedures for a particular component?

Select one of the following:

  • Unit manufacturer’s TO

  • Periodic inspection workcards

  • Service inspection workcards

  • Illustrated parts breakdown

Explanation

Question 70 of 85

1

On the outriggers of the split deck maintenance platform, what prevents accidental loss of cylinder extension?

Select one of the following:

  • Electric solenoids

  • Pressure switches

  • Pilot check valve

  • Limit switch

Explanation

Question 71 of 85

1

What are the two lifting capacities of the davit (lift pulley) on the maintenance platform?

Select one of the following:

  • 150 lbs. or 550 lbs

  • 250 lbs. or 500 lbs

  • 550 lbs. or 2000 lbs

  • 1000 lbs. or 2000 lbs

Explanation

Question 72 of 85

1

What switch, when turned to the OFF position will prevent all control console functions
except platform lowering and engine operation?

Select one of the following:

  • Lift switch

  • Outriggers switch

  • Emergency switch

  • Mode selection switch

Explanation

Question 73 of 85

1

When troubleshooting the split deck maintenance platform, how do you bypass the long scissors control cable and operate the control console while observing the test meter?

Select one of the following:

  • Plug the control console directly into the hydraulic control module.

  • Disconnect the control console from the hydraulic control module.

  • Energize the malfunctioning system.

  • Cut the scissors control cable.

Explanation

Question 74 of 85

1

While operating the split deck maintenance platform you realize the platform will not lower, the probable cause could be

Select one of the following:

  • Corroded battery cables

  • A defective control cable

  • The main disconnect switch is ON

  • The engine switch is in RUN position

Explanation

Question 75 of 85

1

What component provides manual speed adjustment on the AF/M32T-1 cabin leakage tester?

Select one of the following:

  • Tachometer

  • Diesel engine

  • Throttle assembly

  • Fuel system relief valve

Explanation

Question 76 of 85

1

If the air intake of the AF/M32T-1 cabin leakage tester was restricted, what effect would it have on operation?

Select one of the following:

  • High blower output

  • Low blower output

  • High cabin pressure

  • Correct cabin pressure

Explanation

Question 77 of 85

1

What is the reservoir fluid capacity and system pressure of the hydraulic pump on the B-6, 10-ton hydraulic tripod jack?

Select one of the following:

  • 2.1 gallons at 2250 psi

  • 1.5 gallons at 2200 psi

  • 1.1 gallons at 2235 psi

  • 1.0 gallons at 1135 psi

Explanation

Question 78 of 85

1

What component 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?

Select one of the following:

  • Base assembly

  • Upper platform

  • Stair support linkage

  • Hydraulic cylinder assembly

Explanation

Question 79 of 85

1

What controls the speed of retraction of the hydraulic cylinder assembly on the B-1 adjustable aircraft maintenance platform?

Select one of the following:

  • Handle on the bypass valve

  • Upper structure assembly

  • Flow control valve

  • Pump handle

Explanation

Question 80 of 85

1

What type of mechanism does the B-4 adjustable aircraft maintenance platform utilize to raise and lower the platform?

Select one of the following:

  • Screw

  • Scissor

  • Ratchet

  • Pneumatic

Explanation

Question 81 of 85

1

What section of the towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear?

Select one of the following:

  • Head adapter assembly

  • Main tube assembly

  • Extension tubes

  • Lift actuator

Explanation

Question 82 of 85

1

The purpose of the lift mechanism on the towbar is to

Select one of the following:

  • Adjust the forks

  • Stabilize the main tube assembly

  • Raise and lower the wheel assemblies

  • Engage or disengage the aircraft nose gear

Explanation

Question 83 of 85

1

What position would you put the valve handle in to precharge the supply tank of the PMU- 29/E oil cart?

Select one of the following:

  • BYPASS

  • OPEN

  • OFF

  • ON

Explanation

Question 84 of 85

1

When servicing the hydraulic cart, what prevents large particles in the fluid from entering the reservoir?

Select one of the following:

  • Line filter

  • Check valve

  • Mesh screen

  • Relief valve

Explanation

Question 85 of 85

1

Within the universal jack tester control box, what is used to increase the strength of the signals to keep background noise to a minimum?

Select one of the following:

  • Analog digital converter

  • Microprocessor

  • Amplifier

  • Filter

Explanation

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