3569731
Descripción
Test por nicilynn1981, actualizado hace más de 1 año
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Creado por nicilynn1981
hace alrededor de 9 años
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Pregunta 1
Pregunta
What component on the New Generation Heater activates the HCU?
Respuesta
-
Oil pressure switch
-
Burner control unit
-
Heat control switch
-
Thermostatic sensor
Pregunta 2
Pregunta
The HCU on the New Generation Heater starts the main air fan for output air when
Respuesta
-
A heat setting is selected
-
Constant flame is established
-
The temperature gauge reads COOL
-
The inside temperature reaches 140°F
Pregunta 3
Pregunta
When should you use starting aids to start the New Generation Heater?
Respuesta
-
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
Pregunta 4
Pregunta
Repair of ground heater equipment should never be attempted
Respuesta
-
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
Pregunta 5
Pregunta
The amount of heat required to raise the temperature of one pound of a substance one degree Fahrenheit is known as
Respuesta
-
British thermal unit
-
Sensible heat
-
Specific heat
-
Latent heat
Pregunta 6
Pregunta
Heat that can be felt and added or subtracted to a substance without changing its state is called
Respuesta
-
Super heat
-
Latent heat
-
Specific heat
-
Sensible heat
Pregunta 7
Pregunta
Heat added to gaseous substance is known as
Respuesta
-
Sensible heat
-
Specific heat
-
Super heat
-
Latent heat
Pregunta 8
Pregunta
The relationship between pressure and the boiling point of a liquid is seen when
Respuesta
-
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
Pregunta 9
Pregunta
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
Respuesta
-
Temperature of the vapor
-
Type of heat transfer
-
Moisture in the air
-
Pressure applied
Pregunta 10
Pregunta
What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?
Respuesta
-
Blower control switch
-
Airflow control switch
-
Evaporator control switch
-
Temperature control switch
Pregunta 11
Pregunta
What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?
Respuesta
-
Liquid refrigerant.
-
Gaseous refrigerant
-
Pure water solution
-
Ethylene glycol/water solution
Pregunta 12
Pregunta
Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a
Respuesta
-
Low pressure gas
-
High pressure gas
-
Low pressure liquid
-
High pressure liquid
Pregunta 13
Pregunta
After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the
Respuesta
-
Heatsink coils
-
Condenser coils
-
Evaporator coils
-
Receiver inlet valve
Pregunta 14
Pregunta
When starting the MA-3D air conditioner, hold the safety override switch until
Respuesta
-
30 psi oil pressure is registered on the engine oil pressure gauge
-
You release the start switch
-
The engine warms up
-
The engine starts
Pregunta 15
Pregunta
What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?
Respuesta
-
Air cooler fan
-
Air volume controller
-
Temperature controller
-
Temperature control knob
Pregunta 16
Pregunta
What component on the MA-3D air conditioner shuts off the compressor when the suction pressure drops below 5 psi?
Respuesta
-
Low pressure cutout
-
High pressure cutout
-
Temperature controller
-
Temperature control switch
Pregunta 17
Pregunta
What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
Respuesta
-
Inward leaks
-
Vacuum leaks
-
Pressure leaks
-
Outward leaks
Pregunta 18
Pregunta
When performing refrigerant recovery, be sure
Respuesta
-
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
Pregunta 19
Pregunta
The air cycle machine of an A/M32C–10D air conditioner consists of
Respuesta
-
An air compressor fan only
-
An expansion turbine only
-
A heat exchanger and an expansion turbine
-
An expansion turbine and a compressor fan
Pregunta 20
Pregunta
The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the
Respuesta
-
Compressor
-
Heat exchanger
-
Expansion turbine
-
Temperature controller
Pregunta 21
Pregunta
The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to
Respuesta
-
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.
Pregunta 22
Pregunta
What action occurs in the evaporator of the ACE 802S air conditioner?
Respuesta
-
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.
Pregunta 23
Pregunta
What system on the ACE 802S air conditioner “supercharges” the compressor?
Respuesta
-
Defrost
-
Heat boost
-
Vapor injection
-
Liquid injection
Pregunta 24
Pregunta
What valve must be opened prior to starting the engine on the ACE 802S?
Respuesta
-
Air shutoff
-
Fuel shutoff
-
Coolant control
-
Refrigerant flow
Pregunta 25
Pregunta
What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
Respuesta
-
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.
Pregunta 26
Pregunta
In troubleshooting, what is the first step that must be completed when a unit comes in with a write-up in the forms?
Respuesta
-
Isolate the problem.
-
Perform a service inspection.
-
Perform an operational check.
-
Recognize the write-up as a malfunction.
Pregunta 27
Pregunta
How can a restriction in a refrigerant system be identified?
Respuesta
-
Frosting at the outlet
-
Sweating of the outlet
-
Increased suction pressure
-
Loosen fittings to check flow
Pregunta 28
Pregunta
Oil in the rotary vane compressor
Respuesta
-
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
Pregunta 29
Pregunta
What provides pressurized oil to the rotor blades of the MC-2A rotary sliding vane compressor?
Respuesta
-
Hollow-ported bolt
-
Drilled passages
-
Rotor shaft
-
Stator shaft
Pregunta 30
Pregunta
On the MC-2A rotary sliding vane compressor, the minimum pressure valve does all of the following except
Respuesta
-
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.
Pregunta 31
Pregunta
What medium is used to cool the MC-2A rotary vane compressor?
Respuesta
-
Oil
-
Air
-
Water
-
Hydraulic fluid
Pregunta 32
Pregunta
What is the air output of the MC-2A rotary sliding vane compressor?
Respuesta
-
High volume, high pressure
-
High volume, low pressure
-
Low volume, high pressure
-
Low volume, low pressure
Pregunta 33
Pregunta
The valves on a reciprocating compressor are operated by
Respuesta
-
Atmospheric pressure
-
Electrical input
-
Oil pressure
-
Pushrods
Pregunta 34
Pregunta
Oil-moisture traps are required on a multi-stage reciprocating compressor to
Respuesta
-
Cool the compressed air
-
Ensure even compression of the air
-
Introduce moisture to the compressed air
-
Remove moisture from the compressed air
Pregunta 35
Pregunta
During an inspection on an LN2 cart, you should look at all of the following except the
Respuesta
-
Brake assembly
-
Engine oil level
-
Unit for cleanliness
-
Front end alignment
Pregunta 36
Pregunta
When LOX carts are being transported, what position should the vent valve be in?
Respuesta
-
Tow
-
Closed
-
Opened
-
Transport
Pregunta 37
Pregunta
How is the air compressor in the SGNSC categorized?
Respuesta
-
High-pressure
-
Low-pressure
-
High volume
-
Low volume
Pregunta 38
Pregunta
What component on the SGNSC removes nitrogen from the ambient air?
Respuesta
-
Filters
-
Carbon absorber
-
Booster compressor
-
Separation membrane
Pregunta 39
Pregunta
To start the SGNSC, the operator must place the ignition switch in the start position for no more than
Respuesta
-
5 seconds
-
10 seconds
-
15 seconds
-
20 seconds
Pregunta 40
Pregunta
At what storage cylinder pressure, in psig, should the SGNSC nitrogen booster compressor stop?
Respuesta
-
2400 psig
-
4100 psig
-
4400 psig
-
6400 psig
Pregunta 41
Pregunta
The proper level of the gauge of the hydraulic reservoir should be
Respuesta
-
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
Pregunta 42
Pregunta
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?
Respuesta
-
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
Pregunta 43
Pregunta
What is important to keep in mind when performing maintenance on the SGNSC?
Respuesta
-
Weather conditions
-
Wind direction
-
Ventilation
-
Safety
Pregunta 44
Pregunta
When filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand, the reservoir selector valve must be in the
Respuesta
-
Open position
-
Stand position
-
Aircraft position
-
External position
Pregunta 45
Pregunta
The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the
Respuesta
-
Relief valves
-
Aircraft pumps
-
Low pressure filters
-
High pressure pump
Pregunta 46
Pregunta
In the MJ-2A-1 hydraulic test stand, the output volume of the high pressure pump is controlled by the
Respuesta
-
Volume control
-
Flow control valve
-
Compensator control
-
Flowmeter assembly
Pregunta 47
Pregunta
If the position of the reservoir selector valve is changed in the hydraulic test stand during operation, the operator may cause the
Respuesta
-
Flowmeter to be damaged
-
Aircraft reservoir to overfill
-
Flow control valve seals to rupture
-
Return system pressure to decrease
Pregunta 48
Pregunta
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?
Respuesta
-
Water level switch
-
Oil pressure switch
-
Fuel level indicator
-
Fuel pressure switch
Pregunta 49
Pregunta
When setting the controls for operation of the MJ-2A-1 hydraulic test stand, what control must you set in the OPEN position?
Respuesta
-
Compensator control valve
-
Return system bypass valve
-
Supply shut-off valve
-
System selector valve
Pregunta 50
Pregunta
When filling and bleeding the MJ-2A-1 hydraulic test stand, the system should be pressurized and bled until
Respuesta
-
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.
Pregunta 51
Pregunta
What is the most important logical step in troubleshooting a malfunction?
Respuesta
-
Analysis
-
Isolation
-
Recognition
-
Verification
Pregunta 52
Pregunta
When a line is to be disconnected you
Respuesta
-
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.
Pregunta 53
Pregunta
The volume of oil delivered from the variable displacement hydraulic pump to the fixed displacement hydrostatic motor of the MJ-1B bomblift determines the
Respuesta
-
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
Pregunta 54
Pregunta
What prevents over pressurization of the steering system of the MJ-1B bomblift?
Respuesta
-
Bleed valve
-
Relief valve
-
Bypass valve
-
Pressure regulator
Pregunta 55
Pregunta
What valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?
Respuesta
-
Air bleed
-
Rotary by-pass.
-
Counterbalance
-
Over pressurization
Pregunta 56
Pregunta
As soon as the engine of the MJ-1B starts, you should check for sufficient
Respuesta
-
Hydraulic pressure
-
Battery charging
-
Fuel pressure
-
Oil pressure
Pregunta 57
Pregunta
During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit
Respuesta
-
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
Pregunta 58
Pregunta
What is the purpose of the rear control shutoff valve on the MHU-83C/E bomblift?
Respuesta
-
Isolates the brake valve
-
Isolates the counterbalance valve
-
Cuts off fluid through the hydrostatic drive
-
Cuts off fluid through the rear control valves
Pregunta 59
Pregunta
What component on the MHU-83C/E bomblift supplies the brake valve and calipers with fluid?
Respuesta
-
System pump
-
Steering pump
-
Transmission pump
-
Hydraulic system control valve
Pregunta 60
Pregunta
When verifying the proper operation of the centering mechanism on the MHU-83C/E bomblift, the unit should
Respuesta
-
Start in reverse
-
Move in neutral
-
Not start in reverse
-
Not move in neutral
Pregunta 61
Pregunta
You check the backup hydraulic system on the MHU-83C/E bomblift by
Respuesta
-
Closing the shutoff valve
-
Operating the hand pump
-
Closing the air bleed valve
-
Operating the system pump
Pregunta 62
Pregunta
If there is a discrepancy between the workcards and TO, you should refer to
Respuesta
-
The TO
-
The workcards
-
Your supervisor
-
Both the TO and workcards
Pregunta 63
Pregunta
How do you check the shift lock lever for proper operation?
Respuesta
-
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.
Pregunta 64
Pregunta
When troubleshooting the electrical system on the MJ-1B bomblift, what component will give you a visual indication that the alternator is charging?
Respuesta
-
Ammeter
-
Voltmeter
-
Head light
-
Control panel light
Pregunta 65
Pregunta
The engine safety circuits on the FL-1D shutdown the engine by
Respuesta
-
Opening the fuel solenoid
-
Closing the engine intake air
-
Shutting off fuel to the engine
-
Tripping the protective circuit breaker
Pregunta 66
Pregunta
What is used to raise the mast on the FL-1D?
Respuesta
-
Screw mechanism
-
Pneumatic controls
-
Hydraulic cylinder
-
Hand-operated cable
Pregunta 67
Pregunta
What must you do prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D?
Respuesta
-
Secure all doors
-
Warm-up the engine
-
Set the master control switch to ON
-
Position the towbar to the left or right
Pregunta 68
Pregunta
When a unit comes in with a write-up, how do you verify a malfunction exists?
Respuesta
-
Operate the unit
-
Analyze the problem
-
Perform a service inspection
-
Give several probable causes
Pregunta 69
Pregunta
Where can you find test procedures for a particular component?
Respuesta
-
Unit manufacturer’s TO
-
Periodic inspection workcards
-
Service inspection workcards
-
Illustrated parts breakdown
Pregunta 70
Pregunta
On the outriggers of the split deck maintenance platform, what prevents accidental loss of cylinder extension?
Respuesta
-
Electric solenoids
-
Pressure switches
-
Pilot check valve
-
Limit switch
Pregunta 71
Pregunta
What are the two lifting capacities of the davit (lift pulley) on the maintenance platform?
Respuesta
-
150 lbs. or 550 lbs
-
250 lbs. or 500 lbs
-
550 lbs. or 2000 lbs
-
1000 lbs. or 2000 lbs
Pregunta 72
Pregunta
What switch, when turned to the OFF position will prevent all control console functions
except platform lowering and engine operation?
Respuesta
-
Lift switch
-
Outriggers switch
-
Emergency switch
-
Mode selection switch
Pregunta 73
Pregunta
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?
Respuesta
-
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.
Pregunta 74
Pregunta
While operating the split deck maintenance platform you realize the platform will not lower, the probable cause could be
Respuesta
-
Corroded battery cables
-
A defective control cable
-
The main disconnect switch is ON
-
The engine switch is in RUN position
Pregunta 75
Pregunta
What component provides manual speed adjustment on the AF/M32T-1 cabin leakage tester?
Respuesta
-
Tachometer
-
Diesel engine
-
Throttle assembly
-
Fuel system relief valve
Pregunta 76
Pregunta
If the air intake of the AF/M32T-1 cabin leakage tester was restricted, what effect would it have on operation?
Respuesta
-
High blower output
-
Low blower output
-
High cabin pressure
-
Correct cabin pressure
Pregunta 77
Pregunta
What is the reservoir fluid capacity and system pressure of the hydraulic pump on the B-6, 10-ton hydraulic tripod jack?
Respuesta
-
2.1 gallons at 2250 psi
-
1.5 gallons at 2200 psi
-
1.1 gallons at 2235 psi
-
1.0 gallons at 1135 psi
Pregunta 78
Pregunta
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?
Respuesta
-
Base assembly
-
Upper platform
-
Stair support linkage
-
Hydraulic cylinder assembly
Pregunta 79
Pregunta
What controls the speed of retraction of the hydraulic cylinder assembly on the B-1 adjustable aircraft maintenance platform?
Respuesta
-
Handle on the bypass valve
-
Upper structure assembly
-
Flow control valve
-
Pump handle
Pregunta 80
Pregunta
What type of mechanism does the B-4 adjustable aircraft maintenance platform utilize to raise and lower the platform?
Respuesta
-
Screw
-
Scissor
-
Ratchet
-
Pneumatic
Pregunta 81
Pregunta
What section of the towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear?
Respuesta
-
Head adapter assembly
-
Main tube assembly
-
Extension tubes
-
Lift actuator
Pregunta 82
Pregunta
The purpose of the lift mechanism on the towbar is to
Respuesta
-
Adjust the forks
-
Stabilize the main tube assembly
-
Raise and lower the wheel assemblies
-
Engage or disengage the aircraft nose gear
Pregunta 83
Pregunta
What position would you put the valve handle in to precharge the supply tank of the PMU- 29/E oil cart?
Respuesta
-
BYPASS
-
OPEN
-
OFF
-
ON
Pregunta 84
Pregunta
When servicing the hydraulic cart, what prevents large particles in the fluid from entering the reservoir?
Respuesta
-
Line filter
-
Check valve
-
Mesh screen
-
Relief valve
Pregunta 85
Pregunta
Within the universal jack tester control box, what is used to increase the strength of the signals to keep background noise to a minimum?
Respuesta
-
Analog digital converter
-
Microprocessor
-
Amplifier
-
Filter
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