單項選擇題The “grip” of a joint represents the（）.

A.thickness of the connected members
B.diameter of the head
C.entire length of the rivet
D.diameter of the shank


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1.單項選擇題Starting motors，generators，and other spark producing devices should be mounted as high above the bilges as possible to（）.

A.keep them dry when the bilges are full of water
B.keep them cool when the vessel is underway
C.make them more accessible for repairs
D.prevent accidental ignition of any gasoline vapors that may have accumulated in the bilges

2.單項選擇題Small hull leaks can be temporarily repaired by（）.

A.parcelling
B.parbuckling
C.caulking
D.seizing

3.單項選擇題Rivets are usually made of（）.

A.wrought-iron
B.aluminum
C.high-tensile steel
D.mild steel

4.單項選擇題Repairing damage to the hull at or above the waterline reduces the threat of（）.

A.free surface effects
B.capsizing
C.continued progressive flooding
D.wind heel

5.單項選擇題Repair of structures on a ship in the vicinity of liquid mud handling areas presents what possible hazard?（）

A.Toxic gasses may be present
B.Flammable gasses may be present
C.Liquid muds may flood adjoining spaces
D.An oxygen-deficient atmosphere may be present