Quiz
CDC 2A652N - Volume 4 - Common AGE Systems
Perguntas do quiz (85)
1What component on the New Generation Heater activates the HCU?
- AOil pressure switch
- BBurner control unit
- CHeat control switch
- DThermostatic sensor
2The HCU on the New Generation Heater starts the main air fan for output air when
- AA heat setting is selected
- BConstant flame is established
- CThe temperature gauge reads COOL
- DThe inside temperature reaches 140°F
3When should you use starting aids to start the New Generation Heater?
- ADuring the engine start up with the ignition switch in PREHEAT position
- BNever, as it will result in serious engine damage
- CWhen the temperature gauge reads COOL
- DWhen ambient temperature is below 32°F
4Repair of ground heater equipment should never be attempted
- AWithout first talking with the operator
- BWithout first consulting your supervisor
- CUnless accurate technical data is available
- DUnless in the presence of an experienced mechanic
5The amount of heat required to raise the temperature of one pound of a substance one degree Fahrenheit is known as
- ABritish thermal unit
- BSensible heat
- CSpecific heat
- DLatent heat
6Heat that can be felt and added or subtracted to a substance without changing its state is called
- ASuper heat
- BLatent heat
- CSpecific heat
- DSensible heat
7Heat added to gaseous substance is known as
- ASensible heat
- BSpecific heat
- CSuper heat
- DLatent heat
8The relationship between pressure and the boiling point of a liquid is seen when
- APressure increases, it raises the boiling point
- BPressure increases, it lowers the boiling point
- CThe boiling point increases, it raises the pressure
- DThe boiling point increases, it lowers the pressure
9The 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
- ATemperature of the vapor
- BType of heat transfer
- CMoisture in the air
- DPressure applied
10What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?
- ABlower control switch
- BAirflow control switch
- CEvaporator control switch
- DTemperature control switch
11What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?
- ALiquid refrigerant.
- BGaseous refrigerant
- CPure water solution
- DEthylene glycol/water solution
12Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a
- ALow pressure gas
- BHigh pressure gas
- CLow pressure liquid
- DHigh pressure liquid
13After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the
- AHeatsink coils
- BCondenser coils
- CEvaporator coils
- DReceiver inlet valve
14When starting the MA-3D air conditioner, hold the safety override switch until
- A30 psi oil pressure is registered on the engine oil pressure gauge
- BYou release the start switch
- CThe engine warms up
- DThe engine starts
15What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?
- AAir cooler fan
- BAir volume controller
- CTemperature controller
- DTemperature control knob
16What component on the MA-3D air conditioner shuts off the compressor when the suction pressure drops below 5 psi?
- ALow pressure cutout
- BHigh pressure cutout
- CTemperature controller
- DTemperature control switch
17What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
- AInward leaks
- BVacuum leaks
- CPressure leaks
- DOutward leaks
18When performing refrigerant recovery, be sure
- ATo use vacuum pumps
- BTo use the HCU
- CThe output air is between 150°F – 185°F
- DThe refrigerant has become a low-pressure vapor for compressor use
19The air cycle machine of an A/M32C–10D air conditioner consists of
- AAn air compressor fan only
- BAn expansion turbine only
- CA heat exchanger and an expansion turbine
- DAn expansion turbine and a compressor fan
20The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the
- ACompressor
- BHeat exchanger
- CExpansion turbine
- DTemperature controller
21The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to
- AEnsure the engine is at governed speed before engaging compressor.
- BAllow the oil and discharge pressures to stabilize.
- CDefrost the evaporator.
- DBuild-up oil pressure.
22What action occurs in the evaporator of the ACE 802S air conditioner?
- ACondensing refrigerant absorbs heat from the air stream.
- BBoiling refrigerant absorbs heat from the air stream.
- CCondensing refrigerant loses heat to the air stream.
- DBoiling refrigerant loses heat to the air stream.
23What system on the ACE 802S air conditioner “supercharges” the compressor?
- ADefrost
- BHeat boost
- CVapor injection
- DLiquid injection
24What valve must be opened prior to starting the engine on the ACE 802S?
- AAir shutoff
- BFuel shutoff
- CCoolant control
- DRefrigerant flow
25What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
- APermit refrigerant pressure to equalize.
- BPerform maximum refrigerant pump down.
- CPlace heating/cooling switch in HEATING position.
- DPlace the reversing valve lever in the HEATING position.
26In troubleshooting, what is the first step that must be completed when a unit comes in with a write-up in the forms?
- AIsolate the problem.
- BPerform a service inspection.
- CPerform an operational check.
- DRecognize the write-up as a malfunction.
27How can a restriction in a refrigerant system be identified?
- AFrosting at the outlet
- BSweating of the outlet
- CIncreased suction pressure
- DLoosen fittings to check flow
28Oil in the rotary vane compressor
- ALubricates the connecting rods
- BHas high viscosity and is very inflammable
- CForms a seal between the vanes and the stator
- DPermits it to be typed as a high pressure unit
29What provides pressurized oil to the rotor blades of the MC-2A rotary sliding vane compressor?
- AHollow-ported bolt
- BDrilled passages
- CRotor shaft
- DStator shaft
30On the MC-2A rotary sliding vane compressor, the minimum pressure valve does all of the following except
- AEnsure minimum pressure within the oil chamber.
- BEnsure minimum pressure to the condensate drain.
- CPrevent receiver air from flowing back to the compressor by working as a check valve.
- DIncrease the efficiency of the felt pads by ensuring they receive a constant minimum air pressure.
31What medium is used to cool the MC-2A rotary vane compressor?
- AOil
- BAir
- CWater
- DHydraulic fluid
32What is the air output of the MC-2A rotary sliding vane compressor?
- AHigh volume, high pressure
- BHigh volume, low pressure
- CLow volume, high pressure
- DLow volume, low pressure
33The valves on a reciprocating compressor are operated by
- AAtmospheric pressure
- BElectrical input
- COil pressure
- DPushrods
34Oil-moisture traps are required on a multi-stage reciprocating compressor to
- ACool the compressed air
- BEnsure even compression of the air
- CIntroduce moisture to the compressed air
- DRemove moisture from the compressed air
35During an inspection on an LN2 cart, you should look at all of the following except the
- ABrake assembly
- BEngine oil level
- CUnit for cleanliness
- DFront end alignment
36When LOX carts are being transported, what position should the vent valve be in?
- ATow
- BClosed
- COpened
- DTransport
37How is the air compressor in the SGNSC categorized?
- AHigh-pressure
- BLow-pressure
- CHigh volume
- DLow volume
38What component on the SGNSC removes nitrogen from the ambient air?
- AFilters
- BCarbon absorber
- CBooster compressor
- DSeparation membrane
39To start the SGNSC, the operator must place the ignition switch in the start position for no more than
- A5 seconds
- B10 seconds
- C15 seconds
- D20 seconds
40At what storage cylinder pressure, in psig, should the SGNSC nitrogen booster compressor stop?
- A2400 psig
- B4100 psig
- C4400 psig
- D6400 psig
41The proper level of the gauge of the hydraulic reservoir should be
- A2/3 to 3/4 inch from the bottom of the glass
- B2/3 to 3/4 inch from the top of the glass
- C1/2 inch from the bottom of the glass
- D1/2 inch from the top of the glass
42During 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?
- AWarming door is not lowered for cold weather operating conditions
- BLow oil level in the feed air compressor lubricant separator tank
- CBooster compressor defective
- DPoor air ventilation
43What is important to keep in mind when performing maintenance on the SGNSC?
- AWeather conditions
- BWind direction
- CVentilation
- DSafety
44When filling and bleeding the hydraulic system of the MJ-2A-1 hydraulic test stand, the reservoir selector valve must be in the
- AOpen position
- BStand position
- CAircraft position
- DExternal position
45The purpose of the low pressure pump on the MJ-2A-1 is to ensure a constant flow of fluid to the
- ARelief valves
- BAircraft pumps
- CLow pressure filters
- DHigh pressure pump
46In the MJ-2A-1 hydraulic test stand, the output volume of the high pressure pump is controlled by the
- AVolume control
- BFlow control valve
- CCompensator control
- DFlowmeter assembly
47If the position of the reservoir selector valve is changed in the hydraulic test stand during operation, the operator may cause the
- AFlowmeter to be damaged
- BAircraft reservoir to overfill
- CFlow control valve seals to rupture
- DReturn system pressure to decrease
48What engine system safety device on the MJ-2A-1 hydraulic test stand sounds the warning horn in the event of an engine system malfunction?
- AWater level switch
- BOil pressure switch
- CFuel level indicator
- DFuel pressure switch
49When setting the controls for operation of the MJ-2A-1 hydraulic test stand, what control must you set in the OPEN position?
- ACompensator control valve
- BReturn system bypass valve
- CSupply shut-off valve
- DSystem selector valve
50When filling and bleeding the MJ-2A-1 hydraulic test stand, the system should be pressurized and bled until
- AA solid line of fluid can be seen in the sight tube.
- BThe sight tube is filled with bubbles.
- CSight tube fluid turns a milky color.
- DSight tube fluid is blue in color.
51What is the most important logical step in troubleshooting a malfunction?
- AAnalysis
- BIsolation
- CRecognition
- DVerification
52When a line is to be disconnected you
- AEnsure there is no pressure in the system.
- BReplace it with the same type of line.
- CMark the location of the line.
- DSeal all openings.
53The volume of oil delivered from the variable displacement hydraulic pump to the fixed displacement hydrostatic motor of the MJ-1B bomblift determines the
- ADirection of movement of the lift arms
- BSpeed of movement of the lift arms
- CDirection of movement of the truck
- DSpeed of movement of the truck
54What prevents over pressurization of the steering system of the MJ-1B bomblift?
- ABleed valve
- BRelief valve
- CBypass valve
- DPressure regulator
55What valve on the MJ-1B bomblift prevents collapsing of the cantilever lifting arms in the event of hydraulic pressure failure?
- AAir bleed
- BRotary by-pass.
- CCounterbalance
- DOver pressurization
56As soon as the engine of the MJ-1B starts, you should check for sufficient
- AHydraulic pressure
- BBattery charging
- CFuel pressure
- DOil pressure
57During an operational check of the MJ-1B bomblift, all hydraulic components should exhibit
- AA smooth movement with no binding or no jumping
- BFast steady movements with minimal jumping
- CSome settling once the actuator is released
- DSmall amounts of residue
58What is the purpose of the rear control shutoff valve on the MHU-83C/E bomblift?
- AIsolates the brake valve
- BIsolates the counterbalance valve
- CCuts off fluid through the hydrostatic drive
- DCuts off fluid through the rear control valves
59What component on the MHU-83C/E bomblift supplies the brake valve and calipers with fluid?
- ASystem pump
- BSteering pump
- CTransmission pump
- DHydraulic system control valve
60When verifying the proper operation of the centering mechanism on the MHU-83C/E bomblift, the unit should
- AStart in reverse
- BMove in neutral
- CNot start in reverse
- DNot move in neutral
61You check the backup hydraulic system on the MHU-83C/E bomblift by
- AClosing the shutoff valve
- BOperating the hand pump
- CClosing the air bleed valve
- DOperating the system pump
62If there is a discrepancy between the workcards and TO, you should refer to
- AThe TO
- BThe workcards
- CYour supervisor
- DBoth the TO and workcards
63How do you check the shift lock lever for proper operation?
- AAn audible click will be heard and the locking lever will move downward.
- BThe unit will not move in reverse and an audible click will be heard.
- CLocking lever will move upward and an audible click will be heard.
- DThe unit starts and moves in both directions.
64When troubleshooting the electrical system on the MJ-1B bomblift, what component will give you a visual indication that the alternator is charging?
- AAmmeter
- BVoltmeter
- CHead light
- DControl panel light
65The engine safety circuits on the FL-1D shutdown the engine by
- AOpening the fuel solenoid
- BClosing the engine intake air
- CShutting off fuel to the engine
- DTripping the protective circuit breaker
66What is used to raise the mast on the FL-1D?
- AScrew mechanism
- BPneumatic controls
- CHydraulic cylinder
- DHand-operated cable
67What must you do prior to raising or lowering the mast from the vertical or horizontal position on the FL-1D?
- ASecure all doors
- BWarm-up the engine
- CSet the master control switch to ON
- DPosition the towbar to the left or right
68When a unit comes in with a write-up, how do you verify a malfunction exists?
- AOperate the unit
- BAnalyze the problem
- CPerform a service inspection
- DGive several probable causes
69Where can you find test procedures for a particular component?
- AUnit manufacturer’s TO
- BPeriodic inspection workcards
- CService inspection workcards
- DIllustrated parts breakdown
70On the outriggers of the split deck maintenance platform, what prevents accidental loss of cylinder extension?
- AElectric solenoids
- BPressure switches
- CPilot check valve
- DLimit switch
71What are the two lifting capacities of the davit (lift pulley) on the maintenance platform?
- A150 lbs. or 550 lbs
- B250 lbs. or 500 lbs
- C550 lbs. or 2000 lbs
- D1000 lbs. or 2000 lbs
72What switch, when turned to the OFF position will prevent all control console functions
except platform lowering and engine operation?- ALift switch
- BOutriggers switch
- CEmergency switch
- DMode selection switch
73When 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?
- APlug the control console directly into the hydraulic control module.
- BDisconnect the control console from the hydraulic control module.
- CEnergize the malfunctioning system.
- DCut the scissors control cable.
74While operating the split deck maintenance platform you realize the platform will not lower, the probable cause could be
- ACorroded battery cables
- BA defective control cable
- CThe main disconnect switch is ON
- DThe engine switch is in RUN position
75What component provides manual speed adjustment on the AF/M32T-1 cabin leakage tester?
- ATachometer
- BDiesel engine
- CThrottle assembly
- DFuel system relief valve
76If the air intake of the AF/M32T-1 cabin leakage tester was restricted, what effect would it have on operation?
- AHigh blower output
- BLow blower output
- CHigh cabin pressure
- DCorrect cabin pressure
77What is the reservoir fluid capacity and system pressure of the hydraulic pump on the B-6, 10-ton hydraulic tripod jack?
- A2.1 gallons at 2250 psi
- B1.5 gallons at 2200 psi
- C1.1 gallons at 2235 psi
- D1.0 gallons at 1135 psi
78What 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?
- ABase assembly
- BUpper platform
- CStair support linkage
- DHydraulic cylinder assembly
79What controls the speed of retraction of the hydraulic cylinder assembly on the B-1 adjustable aircraft maintenance platform?
- AHandle on the bypass valve
- BUpper structure assembly
- CFlow control valve
- DPump handle
80What type of mechanism does the B-4 adjustable aircraft maintenance platform utilize to raise and lower the platform?
- AScrew
- BScissor
- CRatchet
- DPneumatic
81What section of the towbar has a screw actuated fork assembly that is used to engage or disengage the aircraft nose gear?
- AHead adapter assembly
- BMain tube assembly
- CExtension tubes
- DLift actuator
82The purpose of the lift mechanism on the towbar is to
- AAdjust the forks
- BStabilize the main tube assembly
- CRaise and lower the wheel assemblies
- DEngage or disengage the aircraft nose gear
83What position would you put the valve handle in to precharge the supply tank of the PMU- 29/E oil cart?
- ABYPASS
- BOPEN
- COFF
- DON
84When servicing the hydraulic cart, what prevents large particles in the fluid from entering the reservoir?
- ALine filter
- BCheck valve
- CMesh screen
- DRelief valve
85Within the universal jack tester control box, what is used to increase the strength of the signals to keep background noise to a minimum?
- AAnalog digital converter
- BMicroprocessor
- CAmplifier
- DFilter
Informações
- Descrição
- CDC 2A652N - Volume 4 - Common AGE Systems
- Autor
- nicilynn1981
- Idioma
- English
- Visualizações
- 69
- Etiquetas
- Avaliação
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