1015. Aural warning device is a warning device that signals the presence of a problem by emitting a signal that can be heard

A visible signal is used in aural warning device when a problem occurs.

A signal both can be heard and seen is used in the Aural warning device.

Aural warning device emits a signal that can be heard to represent a problem.

正确答案：C

设备系统操作理论翻译

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2348. 当所要求的维护程序不是很长而且相对简单时,可以将上述的组合归入在一个标题下,称为维护实践

2347. 导航灯从暗亮位到明亮位。

2346. A functional test is tests at minor maintenance periods

2345. 根据43部法规持证的飞行员有权利执行有限的预防性维修

2344. List the tools, equipment and materials required in the job which are not normally included in the mechanic＇s tools

2343. The precision of this adjustment is important

2342. The airplane fuel system supplies pressurized fuel from the center or main tank

2341. Replace components that are worn more than the maximum limits

2340. Install the larger bolts

2339. soak the unit four hours