單項選擇題0n a vessel, the keel is the primary strength member of the lower hull form in which direction?().

A.transverse
B.disagonal
C.longitudinal
D.vertical


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1.單項選擇題0n the fully containerized ship, approximately one-third or more of the cargo is on deck above the rolling center. Top stowed containers are subject to().

A.acceleration greater than on conventional vessels
B.acceleration less than on conventional vessels
C.acceleration the same as on conventional vessels
D.no acceleration

2.單項選擇題0ne function of a hulwark is to().

A.help keep the deck dry
B.prevent stress concentrations on the stringer plate
C.protect against twisting forces exerted on the frame of the vessel
D.reinfo ce th eside stringers

3.單項選擇題0ne of the principal dangers inherent in liquified petroleum gas is().

A.as it warms up it becomes heavier than air
B.the way it reacts with sea water
C.the strong odor it produces
D.its low temperature causes frostbite or freezing

4.單項選擇題0pen ullage holes in tanks which are not gas-free must be protected by().

A.PV valves
B.warning signs
C.flame screens
D.stop-check valves

5.單項選擇題0ur starboard derrick boom of hatch No.4 is baddly cracked()that it has become entirely useless.

A.at its goose neck to such a extent
B.at it's goose neck to such an extent
C.at it's goose neck for such a extent
D.at its goose neck to such an extent