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

一旦IDG DISC灯亮起，IDG可能：Once the IDG DISC lamp illuminates, the IDG may:

CRJ900的AC电源是：AC electrical power on the CRJ900 is:

哪种情况会导致空气驱动发电机在飞行中自动放出？Which condition will cause the ADG to automatically deploy in flight?

(多项选择)从下表中选出2个与空气驱动发电机操作相关的控制。（multiple-choice）From the list below select 2 controls related to ADG operation.

正常飞行条件下，交流勤务汇流条由哪个供电？During normal flight conditions, the AC SERV BUS is powered by:

条件：爬升过程中APU处于运转状态且APU发电机开启，发电机1失效。哪个交流电源将自动向交流汇流条1供电？Condition: on climb out with APU running and generator switched ON, generator 1 fails. Which AC source will automatically power the AC BUS 1?

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

跳开关面板1和2位于：Circuit breaker panels 1 and 2 are located:

如果重要变压整流器组件2失效，什么将作为电瓶汇流条的电源？If ESS TRU 2 fails, what will provide a source of power to the BATT BUS?

在飞行过程中失去正常的交流电源，在什么情况下电瓶将向直流重要汇流条提供电源？In-flight, with loss of normal AC power, under what condition will the batteries provide power to the DC ESS BUS?