單項選擇題A 6x12，two-inch wire rope has（）.

A.12 strands and a two-inch diameter
B.12 strands and a two-inch circumference
C.6 strands and a two-inch diameter
D.6 strands and a two-inch circumference


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1.單項選擇題Limit switches on gravity davits should be tested by（）.

A.the engineers，from a panel in the engine room
B.shutting off the current to the winch
C.pushing the switch lever arm while the winch is running
D.All of the above

2.單項選擇題The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.

A.raise the boom
B.raise the hook
C.raise the boom and hook
D.check the boom stop

3.單項選擇題At the instant when a string of casing being run from a ship is landed in the well head,（）.

A.the total weight in air of the casing string is removed from the ship
B.the hook load (weight of the casing string) is removed from the ship
C.the weight of the casing inside the riser is removed from the ship
D.the weight of the casing string added to the weight of the fill-up mud is removed from the ship

4.單項選擇題A whipping on a fiber line（）.

A.keeps the ends from fraying
B.strengthens it
C.protects your hands
D.becomes part of a splice

5.單項選擇題Herringbone is a term associated with（）.

A.anchoring
B.mooring
C.sewing
D.splicing

6.單項選擇題A splice that can be used in running rigging，where the line will pass through blocks，is a（）.

A.short splice
B.long splice
C.back splice
D.spindle splice

7.單項選擇題Compared to manila line，size for size，nylon line（）.

A.has less strength than manila line
B.has more strength than manila line
C.is equivalent to manila line
D.will rot quicker than manila line

8.單項選擇題The purpose of a devil’s claw is to（）.

A.act as a chain stopper
B.prevent the windlass from engaging
C.prevent the chain from fouling on deck
D.control the wildcat

9.單項選擇題The main function of the core of a wire rope is to（）.

A.give flexibility
B.support the strands laid around it
C.allow some circulation around the strands
D.allow lubrication inside the rope

10.單項選擇題If an attempt is made to hoist a load that exceeds the capacity of an electric winch，an overload safety device causes a circuit breaker to cut off the current to the winch motor（）.

A.when the line pull reaches the rated winch capacity
B.after the line pull exceeds the rated winch capacity
C.after a short build-up of torque
D.immediately