单项选择题

The vessel’s Emergency Position Indicating Radio beacon (EPIRB) must be tested（）.

A.weekly
B.monthly
C.every 2 months
D.every 3 months

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单项选择题

The signal for a fire emergency on an OSV is（）.

A.a 30 second on 30 second off alternating signal
B.the continuous blast of the ships whistle for not less than 10 seconds supplemented by the continuous ringing of the general alarm bells for not less than 10 seconds
C.an intermittent ringing of the general alarm for not less than ten seconds
D.announced over the PA system

单项选择题

The shear rams of a ship blowout preventer stack are used in emergency well control to（）.

A.close and seal around the drill pipe
B.close and seal around casing
C.cut off pipe inside the preventer stack
D.close and seal around drill collars

单项选择题

The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.

A.pressure differences in the atmosphere
B.the length of the hose attached to the facepiece
C.the physical exertion of the person wearing the device
D.spaces containing poisonous vapors