2024知到网课 发动机航线维护智慧树答案

第一章 单元测试

1、单选题：The description in Chapter 73 of AMM is about ( ).
A:Exhaust System
B:Air System
C:Oil System
D:Engine Fuel and Control System
正确答案:【Engine Fuel and Control System】

2、单选题：How many engine mounts does the CFM56-3 have?（）。
A:4
B:1
C:3
D:2
正确答案:【2】

3、单选题：CFM56-3 is a _______ turbofan engine. ( )
A:High bypass, dual rotor
B:Low bypass, dual rotor
C:High bypass, three rotor
D:Low bypass, three rotor
正确答案:【High bypass, dual rotor】

4、单选题：The data plate has NOT the data of（）。
A:TC Number
B:Airframe type
C:Engine model number
D:Thrust ratings
正确答案:【Airframe type】

5、单选题：The CFM56-3 engine supplies ____ for the Boeing 737-300/-400/-500 aircraft. ( )
A:thrust, bleed air, hydraulic, pneumatic
B:thrust, lift force, hydraulic, pneumatic
C:thrust, electric, hydraulic, pneumatic
D:thrust, electric, hydraulic, fuel and oil
正确答案:【thrust, electric, hydraulic, pneumatic】

第二章 单元测试

1、单选题：Which component on CFM56-3 engine produces the most thrust? ( )
A:Exhaust nozzle
B:Combustor
C:Fan
D:Turbine
正确答案:【Fan】

2、单选题：The aerodynamic station of 12 on CFM56-3 engine is ( ).
A:The primary air inlet
B:The inlet of booster
C:The engine inlet
D:The secondary air inlet
正确答案:【The secondary air inlet】

3、单选题：Which bearing can hold the axially load of the N2 rotor? ( )
A:No.4 roller bearing
B:No.3 ball bearing
C:No.1 ball bearing
D:No.2 ball bearing
正确答案:【No.3 ball bearing】

4、单选题：What bearings on CFM56-3 engine are roller bearing? ( )
A:No.2, No.4 and No.5 bearings
B:No.2, No.3 and No.4 bearings
C:No.1, No.2 and No.3 bearings
D:No.3, No.4 and No.5 bearings
正确答案:【No.2, No.4 and No.5 bearings】

5、单选题：The power source for driving fan and booster rotor is from ( ).
A:LPT
B:CSD assembly
C:HPT
D:Air-driving gear box
正确答案:【LPT】

6、单选题：The air used for CFM56-3 HPT blades cooling is ( ).
A:HPC 5th air
B:Booster discharge air
C:HPC 4th air
D:CDP air
正确答案:【CDP air】

7、单选题：How many fan blades does CFM56-7B engine have? ( )
A:18
B:38
C:24
D:36
正确答案:【24】

8、单选题：Which balancing screw for the rebalance of CFM56-3 engine is the lightest? ( )
A:P01
B:P08
C:P06
D:P07
正确答案:【P07】

9、单选题：In the following accessory pads on CFM56-3 engine, which one need to use carbon seal? ( )
A:Air starter and hydraulic pump
B:Control alternator and fuel pump
C:Lube unit and fuel pump
D:Lube unit and hydraulic pump
正确答案:【Air starter and hydraulic pump】

10、单选题：How many stages of LPT does CFM56-3 engine have? ( )
A:2
B:1
C:3
D:4
正确答案:【4】

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? ( )
A:Schedules fuel flow
B:Schedules the LPTCC valve
C:Schedules the HPTCC valve
D:Schedules VSV’s and VBV’s positions
正确答案:【Schedules the LPTCC valve】

2、单选题：What’s the main purpose of the servo fuel heater on CFM56-3 engine? ( )
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
正确答案:【To increase the servo fuel temperature】

3、单选题：In the following fuel nozzles on CFM56-3 engine, which one must have a richer primary flow path? ( )
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
正确答案:【fuel nozzle positions 14 and 15】

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

5、单选题：The CFM56-3 engine symptoms for a T2.5 cold shift are ( ).
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
正确答案:【Possible N1 overshoot/bloom on takeoff】

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

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

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

9、单选题：How the PMC of CFM56-3 engine knows the thrust lever angle? ( )
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
正确答案:【a RVDT in MEC senses the PLA and sends an electrical signal to PMC】

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