第三章单元测试
- In the following descriptions, which one is NOT the function of MEC on CFM56-3 engine? ( )
- What’s the main purpose of the servo fuel heater on CFM56-3 engine? ( )
- In the following fuel nozzles on CFM56-3 engine, which one must have a richer primary flow path? ( )
- What’s the Fail-Safe setting of T2.5 sensor on CFM56-3 engine? ( )
- The CFM56-3 engine symptoms for a T2.5 cold shift are ( ).
- T2.0 sensor on CFM56-3 engine supplies fuel pressure_________ to the MEC in proportion to the FIT. ( )
- Which of the following signals goes into PMC through the J2 connector? ( )
- How many throttle positions does B737-300 aircraft have when CFM56-3 engine is at idle speed? ( )
- How the PMC of CFM56-3 engine knows the thrust lever angle? ( )
- What equipment can transfer the electrical signal from PMC into servo fuel signal in MEC of CFM56-3 engine? ( )
A:Schedules the LPTCC valve
B:Schedules fuel flow
C:Schedules VSV’s and VBV’s positions
D:Schedules the HPTCC valve
答案:Schedules the LPTCC valve
A:To decrease the scavenge oil temperature
B:To decrease the supply oil temperature
C:To increase the servo fuel temperature
D:To increase the combustion fuel temperature
A:fuel nozzle positions 1 and 2
B:fuel nozzle positions 1 and 20
C:fuel nozzle positions 4 and 5
D:fuel nozzle positions 14 and 15
A:760 mmHg / 15℃
B:59℉ / 15℃
C:36℉ / 0℃
D:14.7PSI / 15℃
A:Possibly cannot get takeoff power with high N2 and EGT
B:VSV track closed VBV track open
C:Possible N1 overshoot/bloom on takeoff
D:Slow starts and accelerations
A:P6-Pb
B:Pc-Pb
C:P7-Pb
D:P7-P6
A:PS12
B:N1 and T12
C:Ground support equipment
D:Electrical power from control alternator
A:Three
B:Only one
C:Two
D:Four
A:a LVDT in cockpit senses the PLA and sends an electrical signal directly to PMC
B:a RVDT in MEC senses the PLA and sends an electrical signal to PMC
C:a RVDT in cockpit senses the PLA and sends an electrical signal directly to PMC
D:N2 control alternator on the AGB sends an electrical power to PMC
A:A torque motor on MEC
B:A pilot valve in MEC
C:An EHSV on MEC
D:Six EHSVs on HMU
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