直流电源的供给源有？What are the sources of DC generated power?

APU发电机和空气驱动发电机 APU generator and an air-driven generator

变压整流器组件和两个直流电瓶 Transformer rectifier units and two DC batteries

两台整体驱动发电机和它们相关的发电机 Two IDGS and their associated generators

APU发电机和直流电瓶 APU generator and DC powered batteries

正确答案：B

飞机试题CRJ900题库练习

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进近和着陆阶段最大燃油不平衡允许值是（）。The maximum permissible fuel imbalance during the approach and landing is（）。

起飞阶段最大燃油不平衡允许值是（）。The maximum permissible fuel imbalance during takeoff is（）。

对于ASTM D 1655 Jet A类燃油，起飞最低燃油总温限制是（）。For ASTM D 1655 Jet A fuel，take-off with bulk fuel temperature indications below（）is inhibited。

在初始落地（接地）过程中，最大压差不能超过( )。During initial landing (at touchdown), the maximum differential pressure must not exceed ( ).

起飞和着陆的最大机场气压高度，最大操作高度是？Maximum airport pressure altitude for take-off and landing, and maximum operating altitude are?

CRJ900单空调组件操作的最大高度是：The maximum altitude for single pack operation in a CRJ 900 is:

最大负压差是：Maximum negative differential pressure control is:

判断正误True or False：打开飞机任一舱门前，必须确认飞机完全释压。The airplane must be completely depressurized prior to opening any of the airplane doors.

地面机动操作过程中，压差不得超过( ).During ground maneuvering, the pressure differential must not exceed ( ).

CRJ900经批准的起飞和着陆最低外界温度限制为___。For CRJ900，the certified minimum ambient temperature for takeoff and landing is___.