智慧树知到答案发动机航线维护最新答案

第三章 单元测试

1、单选题：
In the following descriptions, which one is NOT the function of MEC on CFM56-3 engine? ( )
选项：
A:Schedules fuel flow
B:Schedules the LPTCC valve
C:Schedules the HPTCC valve
D:Schedules VSV’s and VBV’s positions
答案: 【】

2、单选题：
What’s the main purpose of the servo fuel heater on CFM56-3 engine? ( )
选项：
A:To decrease the scavenge oil temperature
B:To increase the servo fuel temperature
C:To increase the combustion fuel temperature
D:To decrease the supply oil temperature
答案: 【】

3、单选题：
In the following fuel nozzles on CFM56-3 engine, which one must have a richer primary flow path? ( )
选项：
A:fuel nozzle positions 14 and 15
B:fuel nozzle positions 1 and 2
C:fuel nozzle positions 1 and 20
D:fuel nozzle positions 4 and 5
答案: 【】

4、单选题：
What’s the Fail-Safe setting of T2.5 sensor on CFM56-3 engine? ( )
选项：
A:36℉ / 0℃
B:14.7PSI / 15℃
C:760 mmHg / 15℃
D:59℉ / 15℃
答案: 【】

5、单选题：
The CFM56-3 engine symptoms for a T2.5 cold shift are ( ).
选项：
A:Slow starts and accelerations
B:VSV track closed VBV track open
C:Possibly cannot get takeoff power with high N2 and EGT
D:Possible N1 overshoot/bloom on takeoff
答案: 【

6、单选题：
T2.0 sensor on CFM56-3 engine supplies fuel pressure_________ to the MEC in proportion to the FIT. ( )
选项：
A:Pc-Pb
B:P7-Pb
C:P6-Pb
D:P7-P6
答案: 【】

7、单选题：
Which of the following signals goes into PMC through the J2 connector? ( )
选项：
A:N1 and T12
B:Ground support equipment
C:PS12
D:Electrical power from control alternator
答案: 【】

8、单选题：
How many throttle positions does B737-300 aircraft have when CFM56-3 engine is at idle speed? ( )
选项：
A:Only one
B:Two
C:Four
D:Three
答案: 【】

9、单选题：
How the PMC of CFM56-3 engine knows the thrust lever angle? ( )
选项：
A:N2 control alternator on the AGB sends an electrical power to PMC
B:a RVDT in MEC senses the PLA and sends an electrical signal to PMC
C:a LVDT in cockpit senses the PLA and sends an electrical signal directly to PMC
D:a RVDT in cockpit senses the PLA and sends an electrical signal directly to PMC
答案: 【】

10、单选题：
What equipment can transfer the electrical signal from PMC into servo fuel signal in MEC of CFM56-3 engine? ( )
选项：
A:A torque motor on MEC
B:A pilot valve in MEC
C:Six EHSVs on HMU
D:An EHSV on MEC
答案: 【】

第四章 单元测试

1、单选题：
How many igniter plugs does CFM56-3 engine have? ( )
选项：
A:3
B:5
C:2
D:4
答案: 【】

2、单选题：
The CONT position supplies continuous power to the ignition exciters during ( ).
选项：
A:aircraft on the ground
B:flight
C:engine restart in the flight
D:engine start on the ground
答案: 【

3、单选题：
Which one is TRUE in the following descriptions about the ignition system of CFM56-3 engine? ( )
选项：
A:Only need one gasket controls the depth the igniter plugs go into the combustion chamber.
B:There is no need to provide cooling air around the ignition leads to decrease temperature
C:The Low-energy exciter output is 1 spark per second, 1 joules per spark.
D:Do not apply grease to the threads on the ignition lead end of the igniter plug.
答案: 【】

4、单选题：
On CFM56-3 engine, high-energy exciter output is ( ).
选项：
A:2 sparks per second, 1 joules per spark
B:1 sparks per second, 2 joules per spark
C:1 sparks per second, 1 joules per spark
D:2 sparks per second, 2 joules per spark
答案: 【】

5、单选题：
What are the input of the ignition exciters of the CFM56-3?
选项：
A:14－20KV input.
B:115V AC input.
C:28V DC.
D:230V AC input.
答案: 【】

第五章 单元测试

1、单选题：
How many VSV actuators does CFM56-3 have? ( )
选项：
A:2
B:10
C:20
D:1
答案: 【】

2、单选题：
What’s the feedback equipment of VSV and VBV’s position to the MEC of CFM56-3 engine? ( )
选项：
A:RVDT and electrical cable
B:Resolver and flexible cable
C:Arm, lever and flexible shaft
D:LVDT and electrical cable
答案: 【】

3、单选题：
When CFM56-3 engine is starting or at idle speed condition, the VBV doors is ( ).
选项：
A:half opened
B:at any positon
C:closed
D:opened
答案: 【

4、单选题：
The VBV system of CFM56-3 engine is operated by ( ).
选项：
A:the fuel gear motor
B:the oil scavenge pump
C:the hydraulic pump
D:two fuel actuators
答案: 【】

5、单选题：
When the CFM56-3 engine is running at CRUISE, where is the cooling air for the HPTCC from? ( )
选项：
A:9th HPC
B:CBP
C:5th + 9th HPC
D:5th HPC
答案: 【

第六章 单元测试

1、单选题：
The rear vibration sensor of CFM56-3 engine is located on ( ).
选项：
A:NO.2 bearing support
B:the 12 o’clock position of turbine frame
C:the 3 o’clock position of fan frame
D:NO.1 bearing support
答案: 】

2、单选题：
Which speed signals of CFM56-3 engine does AVM system need? ( )
选项：
A:N2
B:N1
C:N1 and N2
D:AVM system doesn’t need speed signals
答案: 【】

3、单选题：
The EGT indicating system supplies the flight compartment with the EGT as the gas flows through the stage 2 LPT nozzle. ( )
选项：
A:highest
B:average
C:true
D:lowest
答案: 【】

4、单选题：
How many thermocouples does the EGT indicating system of CFM56-3 engine have? ( )
选项：
A:10
B:11
C:9
D:8
答案: 【】

5、单选题：
Which vibration signal will be sent to the flight compartment for each engine on B737-300 aircraft? ( )
选项：
A:the fan’s vibration signal
B:the lowest vibration signal
C:the core’s vibration signal
D:the strongest vibration signal
答案: 【】

第七章 单元测试

1、单选题：
In the following descriptions about the oil system of CFM56-3 engine, which one is TRUE? ( )
选项：
A:The oil quantity can be got from the sight glass of the oil tank
B:None of the above
C:The oil tank is vented to the ambient air directly
D:The oil sumps are Dry-Sump designed
答案: 【】

2、单选题：
What air source is used to pressurize rear sump in CFM56 engines? ( )
选项：
A:the 5th bleed air from HPC
B:CBP air
C:Fan discharge air
D:Booster discharge air
答案: 【

3、单选题：
The oil cooler of oil system on CFM56-3 engine are located in ( ).
选项：
A:the oil scavenge circuit
B:the oil tank
C:the oil supply circuit
D:the AGB
答案: 【】

4、单选题：
How many oil pumps does CFM56-3’s oil system have? ( )
选项：
A:3
B:2
C:4
D:1
答案: 【】

5、单选题：
On CFM56-3 engine, the oil temperature indicates the pressure of ( ).
选项：
A:Oil supply.
B:Oil tank.
C:Oil scavenge.
D:Oil venting.
答案: 】

第八章 单元测试

1、单选题：
How long can be the starter operated continuously up to? ( )
选项：
A:one minute
B:two minutes
C:three minutes
D:four minutes
答案: 【

2、单选题：
During starting of CFM56-3 engine, the limit for maximum exhaust gas temperature (EGT) is ( ).
选项：
A:725 ℃
B:600 ℃
C:600 ℉
D:725 ℉
答案: 【

3、单选题：
During takeoff of CFM56-3 engine, the limit for maximum exhaust gas temperature (EGT) is ( ).
选项：
A:600 ℃
B:600 ℉
C:930 ℃
D:930 ℉
答案: 【

4、单选题：
EGT is the short for ( ).
选项：
A:Engine gas temperature
B:Exhaust ground thrust
C:Exhaust gas temperature
D:Engine ground thrust
答案: 【】

5、单选题：
When CFM56-3 engine is at idle speed, the minimum oil pressure is ( ).
选项：
A:27 PSI
B:30 PSI
C:23 PSI
D:13 PSI
答案: 【】