單項選擇題The maximum speed of lowering for a lifeboat on gravity davits is controlled by the（）.

A.limit switches
B.emergency disconnect switch
C.governor brake
D.position of the counterweight on the brake handle


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1.單項選擇題The Master or person in charge of a ship shall insure that each deck from which lifeboats are launched is（）.

A.surfaced with a nonskid texture
B.roped off to prevent unnecessary access
C.kept clear of any obstructions that would interfere with launching
D.posted with a list of persons assigned to the lifeboat

2.單項選擇題The lifeboat releasing gear lever should be marked with the words（）.

A.DANGER，DO NOT TOUCH
B.DANGER，BOAT MAY DROP
C.DANGER，LEVER RELEASES BOAT
D.DANGER，LEVER DROPS BOAT

3.單項選擇題The length of the steering oar in a lifeboat is（）.

A.shorter than the rowing oars
B.the same length as the rowing oars
C.longer than the rowing oars
D.unrelated to the length of the rowing oars

4.單項選擇題The grab rail of a metal lifeboat is normally located（）.

A.along the turn of the bilge
B.along each side of the keel
C.near the top of the gunwale
D.at the bow and at the stern

5.單項選擇題The governor brake shall be capable of controlling the speed of lowering a fully equipped lifeboat with its complement of persons on board at（）.

A.safe speed only specified
B.not less than 120 feet per minute
C.not more than 120 feet per minute
D.not more than 90 feet per minute