After resolving the trouble of main power supply, main switch of emergency generator should（）, if power supply is refreshed.<br>A:be switched off by the duty officer<br>B:be switched on by the duty officer<br>C:be switched off automatically<br>D:be switched on automatically

After resolving the trouble of main power supply, main switch of emergency generator should（）, if power supply is refreshed.
A:be switched off by the duty officer
B:be switched on by the duty officer
C:be switched off automatically
D:be switched on automatically

出自：海船船员证

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