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单选题
如果发动机过热/火警探测器无法运行,则发动机和APU火警探测组件自动转换到单环路工作。在单环路模式下,只有 1 个环路必须探测发动机和APU火警探测组件的过热或火警状况以给出警报状况。
A
If an engine overheat/fire detector can not operate, the engine and APU fire alarm unit alternatively changes to single loop operation. In the single loop module, only one loop must check the engine and APU fire detection module for an overheat or fire co
B
If an engine overheat/fire detector fails to operate, the engine and APU fire detection module automatically changes to single loop operation. In the single loop mode, only one loop must detect an overheat or fire condition for the engine and APU fire det
C
If an engine overheat/fire detector is inoperative, the engine and APU fire detection module automatically changes to single loop operation. In the single loop mode, only one loop must detect an overheat or fire condition by the engine and APU fire detect
答案解析
正确答案：B
相关知识点：
火警探测器工作模式
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