你可能感興趣的試題

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

單項(xiàng)選擇題

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