Frage 1
Frage
What component on the New Generation Heater activates the HCU?
Antworten
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Oil pressure switch
-
Burner control unit
-
Heat control switch
-
Thermostatic sensor
Frage 2
Frage
The HCU on the New Generation Heater starts the main air fan for output air when
Antworten
-
A heat setting is selected
-
Constant flame is established
-
The temperature gauge reads COOL
-
The inside temperature reaches 140°F
Frage 3
Frage
When should you use starting aids to start the New Generation Heater?
Antworten
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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
Frage 4
Frage
Repair of ground heater equipment should never be attempted
Antworten
-
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
Frage 5
Frage
The amount of heat required to raise the temperature of one pound of a substance one degree Fahrenheit is known as
Antworten
-
British thermal unit
-
Sensible heat
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Specific heat
-
Latent heat
Frage 6
Frage
Heat that can be felt and added or subtracted to a substance without changing its state is called
Antworten
-
Super heat
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Latent heat
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Specific heat
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Sensible heat
Frage 7
Frage
Heat added to gaseous substance is known as
Antworten
-
Sensible heat
-
Specific heat
-
Super heat
-
Latent heat
Frage 8
Frage
The relationship between pressure and the boiling point of a liquid is seen when
Antworten
-
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
Frage 9
Frage
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
Antworten
-
Temperature of the vapor
-
Type of heat transfer
-
Moisture in the air
-
Pressure applied
Frage 10
Frage
What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?
Frage 11
Frage
What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?
Frage 12
Frage
Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a
Antworten
-
Low pressure gas
-
High pressure gas
-
Low pressure liquid
-
High pressure liquid
Frage 13
Frage
After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the
Antworten
-
Heatsink coils
-
Condenser coils
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Evaporator coils
-
Receiver inlet valve
Frage 14
Frage
When starting the MA-3D air conditioner, hold the safety override switch until
Frage 15
Frage
What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?
Antworten
-
Air cooler fan
-
Air volume controller
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Temperature controller
-
Temperature control knob
Frage 16
Frage
What component on the MA-3D air conditioner shuts off the compressor when the suction pressure drops below 5 psi?
Frage 17
Frage
What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
Antworten
-
Inward leaks
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Vacuum leaks
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Pressure leaks
-
Outward leaks
Frage 18
Frage
When performing refrigerant recovery, be sure
Frage 19
Frage
The air cycle machine of an A/M32C–10D air conditioner consists of
Antworten
-
An air compressor fan only
-
An expansion turbine only
-
A heat exchanger and an expansion turbine
-
An expansion turbine and a compressor fan
Frage 20
Frage
The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the
Antworten
-
Compressor
-
Heat exchanger
-
Expansion turbine
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Temperature controller
Frage 21
Frage
The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to
Frage 22
Frage
What action occurs in the evaporator of the ACE 802S air conditioner?
Antworten
-
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.
Frage 23
Frage
What system on the ACE 802S air conditioner “supercharges” the compressor?
Antworten
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Defrost
-
Heat boost
-
Vapor injection
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Liquid injection
Frage 24
Frage
What valve must be opened prior to starting the engine on the ACE 802S?
Antworten
-
Air shutoff
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Fuel shutoff
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Coolant control
-
Refrigerant flow
Frage 25
Frage
What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
Antworten
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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.
Frage 26
Frage
In troubleshooting, what is the first step that must be completed when a unit comes in with a write-up in the forms?
Antworten
-
Isolate the problem.
-
Perform a service inspection.
-
Perform an operational check.
-
Recognize the write-up as a malfunction.
Frage 27
Frage
How can a restriction in a refrigerant system be identified?
Frage 28
Frage
Oil in the rotary vane compressor
Antworten
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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
Frage 29
Frage
What provides pressurized oil to the rotor blades of the MC-2A rotary sliding vane compressor?
Antworten
-
Hollow-ported bolt
-
Drilled passages
-
Rotor shaft
-
Stator shaft
Frage 30
Frage
On the MC-2A rotary sliding vane compressor, the minimum pressure valve does all of the following except
Antworten
-
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.
Frage 31
Frage
What medium is used to cool the MC-2A rotary vane compressor?
Antworten
-
Oil
-
Air
-
Water
-
Hydraulic fluid
Frage 32
Frage
What is the air output of the MC-2A rotary sliding vane compressor?
Antworten
-
High volume, high pressure
-
High volume, low pressure
-
Low volume, high pressure
-
Low volume, low pressure
Frage 33
Frage
The valves on a reciprocating compressor are operated by
Antworten
-
Atmospheric pressure
-
Electrical input
-
Oil pressure
-
Pushrods
Frage 34
Frage
Oil-moisture traps are required on a multi-stage reciprocating compressor to
Antworten
-
Cool the compressed air
-
Ensure even compression of the air
-
Introduce moisture to the compressed air
-
Remove moisture from the compressed air
Frage 35
Frage
During an inspection on an LN2 cart, you should look at all of the following except the
Antworten
-
Brake assembly
-
Engine oil level
-
Unit for cleanliness
-
Front end alignment
Frage 36
Frage
When LOX carts are being transported, what position should the vent valve be in?
Antworten
-
Tow
-
Closed
-
Opened
-
Transport
Frage 37
Frage
How is the air compressor in the SGNSC categorized?
Antworten
-
High-pressure
-
Low-pressure
-
High volume
-
Low volume
Frage 38
Frage
What component on the SGNSC removes nitrogen from the ambient air?
Antworten
-
Filters
-
Carbon absorber
-
Booster compressor
-
Separation membrane
Frage 39
Frage
To start the SGNSC, the operator must place the ignition switch in the start position for no more than
Antworten
-
5 seconds
-
10 seconds
-
15 seconds
-
20 seconds
Frage 40
Frage
At what storage cylinder pressure, in psig, should the SGNSC nitrogen booster compressor stop?
Antworten
-
2400 psig
-
4100 psig
-
4400 psig
-
6400 psig
Frage 41
Frage
The proper level of the gauge of the hydraulic reservoir should be
Antworten
-
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
Frage 42
Frage
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?
Antworten
-
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
Frage 43
Frage
What is important to keep in mind when performing maintenance on the SGNSC?
Antworten
-
Weather conditions
-
Wind direction
-
Ventilation
-
Safety
Frage 44
Frage
When filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand, the reservoir selector valve must be in the
Antworten
-
Open position
-
Stand position
-
Aircraft position
-
External position
Frage 45
Frage
The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the
Antworten
-
Relief valves
-
Aircraft pumps
-
Low pressure filters
-
High pressure pump
Frage 46
Frage
In the MJ-2A-1 hydraulic test stand, the output volume of the high pressure pump is controlled by the
Antworten
-
Volume control
-
Flow control valve
-
Compensator control
-
Flowmeter assembly
Frage 47
Frage
If the position of the reservoir selector valve is changed in the hydraulic test stand during operation, the operator may cause the
Antworten
-
Flowmeter to be damaged
-
Aircraft reservoir to overfill
-
Flow control valve seals to rupture
-
Return system pressure to decrease
Frage 48
Frage
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?
Antworten
-
Water level switch
-
Oil pressure switch
-
Fuel level indicator
-
Fuel pressure switch
Frage 49
Frage
When setting the controls for operation of the MJ-2A-1 hydraulic test stand, what control must you set in the OPEN position?
Frage 50
Frage
When filling and bleeding the MJ-2A-1 hydraulic test stand, the system should be pressurized and bled until
Antworten
-
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.
Frage 51
Frage
What is the most important logical step in troubleshooting a malfunction?
Antworten
-
Analysis
-
Isolation
-
Recognition
-
Verification
Frage 52
Frage
When a line is to be disconnected you
Antworten
-
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.
Frage 53
Frage
The volume of oil delivered from the variable displacement hydraulic pump to the fixed displacement hydrostatic motor of the MJ-1B bomblift determines the
Antworten
-
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
Frage 54
Frage
What prevents over pressurization of the steering system of the MJ-1B bomblift?
Antworten
-
Bleed valve
-
Relief valve
-
Bypass valve
-
Pressure regulator
Frage 55
Frage
What valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?
Antworten
-
Air bleed
-
Rotary by-pass.
-
Counterbalance
-
Over pressurization
Frage 56
Frage
As soon as the engine of the MJ-1B starts, you should check for sufficient
Antworten
-
Hydraulic pressure
-
Battery charging
-
Fuel pressure
-
Oil pressure
Frage 57
Frage
During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit
Antworten
-
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
Frage 58
Frage
What is the purpose of the rear control shutoff valve on the MHU-83C/E bomblift?
Antworten
-
Isolates the brake valve
-
Isolates the counterbalance valve
-
Cuts off fluid through the hydrostatic drive
-
Cuts off fluid through the rear control valves
Frage 59
Frage
What component on the MHU-83C/E bomblift supplies the brake valve and calipers with fluid?
Frage 60
Frage
When verifying the proper operation of the centering mechanism on the MHU-83C/E bomblift, the unit should
Antworten
-
Start in reverse
-
Move in neutral
-
Not start in reverse
-
Not move in neutral
Frage 61
Frage
You check the backup hydraulic system on the MHU-83C/E bomblift by
Antworten
-
Closing the shutoff valve
-
Operating the hand pump
-
Closing the air bleed valve
-
Operating the system pump
Frage 62
Frage
If there is a discrepancy between the workcards and TO, you should refer to
Frage 63
Frage
How do you check the shift lock lever for proper operation?
Antworten
-
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.
Frage 64
Frage
When troubleshooting the electrical system on the MJ-1B bomblift, what component will give you a visual indication that the alternator is charging?
Antworten
-
Ammeter
-
Voltmeter
-
Head light
-
Control panel light
Frage 65
Frage
The engine safety circuits on the FL-1D shutdown the engine by
Antworten
-
Opening the fuel solenoid
-
Closing the engine intake air
-
Shutting off fuel to the engine
-
Tripping the protective circuit breaker
Frage 66
Frage
What is used to raise the mast on the FL-1D?
Antworten
-
Screw mechanism
-
Pneumatic controls
-
Hydraulic cylinder
-
Hand-operated cable
Frage 67
Frage
What must you do prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D?
Frage 68
Frage
When a unit comes in with a write-up, how do you verify a malfunction exists?
Frage 69
Frage
Where can you find test procedures for a particular component?
Antworten
-
Unit manufacturer’s TO
-
Periodic inspection workcards
-
Service inspection workcards
-
Illustrated parts breakdown
Frage 70
Frage
On the outriggers of the split deck maintenance platform, what prevents accidental loss of cylinder extension?
Antworten
-
Electric solenoids
-
Pressure switches
-
Pilot check valve
-
Limit switch
Frage 71
Frage
What are the two lifting capacities of the davit (lift pulley) on the maintenance platform?
Antworten
-
150 lbs. or 550 lbs
-
250 lbs. or 500 lbs
-
550 lbs. or 2000 lbs
-
1000 lbs. or 2000 lbs
Frage 72
Frage
What switch, when turned to the OFF position will prevent all control console functions
except platform lowering and engine operation?
Antworten
-
Lift switch
-
Outriggers switch
-
Emergency switch
-
Mode selection switch
Frage 73
Frage
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?
Antworten
-
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.
Frage 74
Frage
While operating the split deck maintenance platform you realize the platform will not lower, the probable cause could be
Antworten
-
Corroded battery cables
-
A defective control cable
-
The main disconnect switch is ON
-
The engine switch is in RUN position
Frage 75
Frage
What component provides manual speed adjustment on the AF/M32T-1 cabin leakage tester?
Antworten
-
Tachometer
-
Diesel engine
-
Throttle assembly
-
Fuel system relief valve
Frage 76
Frage
If the air intake of the AF/M32T-1 cabin leakage tester was restricted, what effect would it have on operation?
Antworten
-
High blower output
-
Low blower output
-
High cabin pressure
-
Correct cabin pressure
Frage 77
Frage
What is the reservoir fluid capacity and system pressure of the hydraulic pump on the B-6, 10-ton hydraulic tripod jack?
Antworten
-
2.1 gallons at 2250 psi
-
1.5 gallons at 2200 psi
-
1.1 gallons at 2235 psi
-
1.0 gallons at 1135 psi
Frage 78
Frage
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?
Frage 79
Frage
What controls the speed of retraction of the hydraulic cylinder assembly on the B-1 adjustable aircraft maintenance platform?
Frage 80
Frage
What type of mechanism does the B-4 adjustable aircraft maintenance platform utilize to raise and lower the platform?
Antworten
-
Screw
-
Scissor
-
Ratchet
-
Pneumatic
Frage 81
Frage
What section of the towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear?
Antworten
-
Head adapter assembly
-
Main tube assembly
-
Extension tubes
-
Lift actuator
Frage 82
Frage
The purpose of the lift mechanism on the towbar is to
Antworten
-
Adjust the forks
-
Stabilize the main tube assembly
-
Raise and lower the wheel assemblies
-
Engage or disengage the aircraft nose gear
Frage 83
Frage
What position would you put the valve handle in to precharge the supply tank of the PMU- 29/E oil cart?
Frage 84
Frage
When servicing the hydraulic cart, what prevents large particles in the fluid from entering the reservoir?
Antworten
-
Line filter
-
Check valve
-
Mesh screen
-
Relief valve
Frage 85
Frage
Within the universal jack tester control box, what is used to increase the strength of the signals to keep background noise to a minimum?
Antworten
-
Analog digital converter
-
Microprocessor
-
Amplifier
-
Filter