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【单选题】

Electrical failures in motors are caused by the breakdown of insulation, which may be caused by （）

A、penetration of moisture

B、accumulation of dirt

C、overheating

D、All of the above

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更多“Electrical failures in motors are caused by the breakdown of insulation, which may be caused by （）”相关的问题

第1题

[单选题] All of the followings are the detainable deficiencies under the SOLAS Convention expert（）.

A、Failure of proper operation of propulsion and other essential machinery, as well as electrical installation B、Failure of the proper operation of the main and auxiliary steering gear C、Failure of engineering watch arrangements to confirm to the requirements specified for the ship by Administration D、Failure of the proper operation of emergency generator, lighting, batteries and switches

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第2题

[单选题] During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）

A、failure of the proper operation of the main steering gear B、failure of the proper operation of electrical installations C、leakage of domestic water pump D、insulation of exhaust pipes in engine room contaminated by oil

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第3题

[单选题] You executed the following commands in an RMAN session for your database instance that has failures: RMAN> LIST FAILURE; After some time, you executed the following command in the same session: RMAN> ADVISE FAILURE; But there are new failures recorded in the Automatic Diagnostic Repository (ADR) after the execution of the last LIST FAILURE command. Which statement is true for the above ADVISE FAILURE command in this scenario?（）

A、It produces a warning for new failures before advising for CRITICAL and HIGH failures. B、It ignores new failures and considers the failures listed in the last LIST FAILURE command only. C、It produces an error with recommendation to run the LIST FAILURE command before the ADVISE FAILURE command. D、It produces advice only for new failures and the failures listed in the last LIST FAILURE command are ignored.

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第4题

[单选题] 在TCH信道上收到下面哪条消息时计一次MC739掉话（）

A、Connetion Failure Indication (cause'radio link failure') B、Connetion Failure Indication(cause'remmote transcoder failure') C、Connetion Failure Indication(cause'equipment failure') D、Connetion Failure Indication(cause'YY_TXPWR_M')

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第5题

[单选题] 下面哪一个打开备用电源的操作顺序是正确的？

A、I 打开Standby electrical power。II 打开E-inverter。 III 打开TRU。 B、I 打开Standby electrical power。II 打开TRU。 III 打开E-inverter。 C、I 打开E-inverter。II 打开TRU。 III 打开Standby electrical power。 D、I 打开TRU。II 打开E-inverter。 III 打开Standby electrical power。

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第6题

[简答题] CCC控制器面板上的辅助窗口内出现报警代码＂MPU 1 failure＂＂MPU 2 failure＂或＂MPU 3 failure＂的含义？

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第7题

[单选题] Observe the following warning in an RMAN session of your database instance: WARNING: new failures were found since last LIST FAILURE command Which statement describes the scenario that must have produced this warning?（）

A、The CHANGE FAILURE command has detected new failures recorded in the Automatic Diagnostic Repository(ADR) B、The VALIDATE DATABASE command has detected new failures recorded in the Automatic Diagnostic Repository (ADR) C、The ADVISE FAILURE command has detected new failures recorded in the Automatic Diagnostic Repository (ADR) since the last LIST FAILURE D、The RECOVER command has detected new failures recorded in the Automatic Diagnostic Repository (ADR) since the last LIST FAILURE command was executed

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第8题

[单选题] Which of the following could cause an Inaccessible boot drive error during the boot process? （）

A、HDD failure B、DVI failure C、USB failure D、CD failure

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第9题

[] When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring，his first step is to（）.

A、A.flush water over any burned area of the patient B、B.apply ointment to the burned areas on the patient C、C.get assistance to shut down electrical power in the area D、D.remove the patient from the vicinity of the live electrical equipment or wiring

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