單項選擇題0il fires are best extinguish by（）.
A.cutting off supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water
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1.單項選擇題0n a crane ,the boom indicator tells the operator what angle the boom angle is compared to the（）.
A.vertical position
B.horizontal position
C.boom stop angle
D.minimum radius angle
2.單項選擇題0n a vessel ,a C02 extinguisher is checked by（）.
A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO2
D.seeing if the seal has been broken
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The dew point temperature is（）.
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Which of the following is not an operation mode of AIS?（）
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Which of the following is not a form of precipitation?（）
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（）is where the crew eat their meals.
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Which of the following shall not the officers in charge of the navigational watch do?（）
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