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单选题
A large oil fire is best extinguished with（）
A
soda acid
B
foam
C
CO2
D
sand
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dry chemicalB
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单选题What is an advantage of using foam in fire fighting?（）A
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单选题The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler （）A
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单选题The FIRST step to take in fighting an engine room fire resulting from a ruptured fuel oil service line, is to （）.A
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单选题Class A fires are best extinguished by quenching or cooling with （）.A
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单选题Class B fires are best extinguished by smothering, i-e（）.A
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removal of heatC
spraying of waterD
injecting of soda-acid
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单选题When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.A
air from contacting the oil vaporsB
permitting re-ignition boiling of the heated oilC
spontaneous combustion below the oil surfaceD
toxic fumes from escaping to the surface
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单选题Cargo transfer operations on a tanker need NOT be stopped when（）.A
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the oxygenD
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The Cause of a Fire.C
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