單項(xiàng)選擇題The stability of a vessel is normally the greatest when all fuel and water tanks are full because the （）.

A.center of gravity is lowered
B.center of buoyancy is lowered
C.reserve buoyancy is unchanged
D.hull freeboard is increased


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1.單項(xiàng)選擇題Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）

A.The agent is considered nontoxic at room temperature in low concentrations
B.The agent is less effective than carbon dioxide
C.Halon primarily extinguishes the fire by cooling
D.The agent cannot be used on electrical fires because it leaves a residue

2.單項(xiàng)選擇題In order to find out which lifeboat you are assigned, you should look at the （）.

A.Certificate of Inspection
B.Station Bill
C.Ships Articles
D.Fire Control Plan

3.單項(xiàng)選擇題You may improve a vessels stability by （）.

A.keeping the fuel tanks topped off
B.increasing the free surface effect
C.keeping the fuel tanks at least half MI
D.keeping at least one fuel tank empty for slops

4.單項(xiàng)選擇題When reentering an engine room that has been flooded with CO2, the investigating team should initially（）.

A.leave the access door partially open
B.enter from the lowest level
C.enter from the highest level
D.attempt to operate machinery

5.單項(xiàng)選擇題If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of （）.

A.unburned carbon particles
B.excess nitrogen
C.a lack of oxygen
D.excess hydrogen