單項選擇題A block that can be opened at the hook or shackle end to receive a bight of the line is a（）.

A.bight block
B.gin block
C.heel block
D.snatch block


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1.單項選擇題A buoy having red and green horizontal bands would have a light characteristic of（）.

A.group occulting
B.composite group flashing
C.Morse letter A
D.quick flashing

2.單項選擇題A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.

A.posted with instruction on the operation of the systm
B.ventilated and equipped with explosion-proof switches
C.painted with red and black diagonal stripes
D.equipped with a battery powered source of emergency lighting

3.單項選擇題A carbon dioxide fire extinguisher should be recharged（）.

A.at least annually
B.whenever it is below its required weight
C.only if the extinguisher has been used
D.before every safety inspection

4.單項選擇題A certificated lifeboatman assigned to command the lifeboat must（）.

A.be the first individual to board the craft
B.drain the hydraulic pressure before lowering the craft
C.have a list of the persons assigned to the lifeboat
D.All of the above

5.單項選擇題A chain stripper is used to（）.

A.prevent chain from clinging to the wildcat
B.clean the marine debris from the chain
C.flake chain from a boat's chain locker
D.clean chain prior to an x-ray inspection