【单选题】
CFM56-5B发动机，当主电门按到“ON”位时，高压关断valve（）___
A. 电磁线圈通电，由弹簧力保持valve在关位
B. 电磁线圈断电，由弹簧力保持valve在关位
C. 电磁线圈通电，valve打开供油
D. 电磁线圈断电，valve打开供油
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答案
B
解析
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【单选题】
CFM56-5B发动机处于停车状态，APU工作并供气给空调系统，此时若“IGNSTART”位被选择，则（）___
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CFM56-5B发动机冷转时，起动valve何时打开（）___
A. 选择到“CRANK”位时
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CFM56-5B发动机上的哪个valve确保供向燃油喷咀有足够的燃油（）___
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CFM56-5B发动机试车，在慢车功率时可否打开风扇整流罩（）___
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CFM56-5B发动机运转时，关于连续点火选择的说法正确的是（）___
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【单选题】
CFM56-5B反推操作的条件是（）___
A. 油门杆位置
B. 油门杆位置+飞机在地面
C. 油门杆位置+飞机在地面+反推指示为绿色
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CFM56-5B燃油系统中的燃油回油valve（FRV）的位置电门输送什么信息到ECU（）___
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【单选题】
CFM56-5B燃油系统中回油valve（FRV）的作用是（）___
A. 发动机停车时释压燃油系统
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【单选题】
EEC是怎样把v2500发动机参数传输给ECAM的()___
A. 直接传输
B. 通过EIU
C. 数字信号直接、模拟信号通过EIU
D. 上ECAM的主要参数直接传输、下ECAM的次要参数通过EIU
【单选题】
v2500发动机EEC通过控制什么valve来控制燃油HMS（热管理系统）()___
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