單項選擇題A double male coupling is one that（）.

A.has left hand twist
B.has inside threads on both ends
C.has outside threads on both ends
D.takes two men to operate


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1.單項選擇題A fairly accurate estimation of a ship’s position can be calculated by a technique known as（）.

A.dead reckoning
B.pilotage
C.great circle sailing
D.geographic navigation

2.單項選擇題A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind（）.

A.blows the fire back toward the vessel
B.comes over the bow
C.comes over the stern
D.comes over either beam

3.單項選擇題A fire in a ballast pumproom can be brought under control with minimal impact on stability by（）.

A.cooling the outside bulkheads with water
B.shutting all sources of air into the compartment
C.closing the sea chest
D.flooding the compartment with salt water

4.單項選擇題A fire in the galley always poses the additional threat of（）.

A.contaminating food with extinguishing agent
B.shutting all sources of air into the compartment
C.closing the sea chest
D.a grease fire in the ventilation system

5.單項選擇題A fire is discovered in the forepeak of a vessel at sea. The wind is from ahead at 35 knots.You should（）.

A.remain on course and hold speed
B.change course and put the stern to the wind
C.change course to put the wind on either beam and increase speed
D.remain on course but slack the speed