deprival of oxygen
removal of heat
spraying of water
injecting of soda-acid
第1题：
Oil fires are best extinguished by ______.
A.cutting off the supply of oxygen
B.removing the fuel
C.cooling below the ignition temperature
D.spraying with water
第2题：
Fires of which class would most likely occur in the engine room of a vessel ________．
A.Classes A and B
B.Classes B and C
C.Classes C and D
D.Classes A and D
第3题：
Which of the following is the best title for this text？
[A] The Middle Class on the Alert
[B] The Middle Class on the Cliff
[C] The Middle Class in Conflict
[D] The Middle Class in Ruins
第4题：
cooling
smothering
oxygen dilution
breaking the chain reaction
第5题：
cutting off supply of oxygen
removing the fuel
cooling below the ignition temperature
spraying with water
第6题：
The emergency signal for fires is sounded on the ship’s whistle and general alarm as _____.
A.a continuous ringing for 10 seconds
B.one short ring followed by one long ring
C.two long rings of at least 20 seconds
D.a continuous ringing until the fire is extinguished
第7题：
A fire of escaping liquefied flammable gas is best extinguished by ______.
A.cooling the gas below the ignition point
B.cutting off the supply of oxygen
C.stopping the flow of gas
D.interrupting the chain reaction
第8题：
Which of the following is the best title for this text？
A．The Middle Class on the Alert
B．The Middle Class on the Cliff
C．The Middle Class in Conflict
D．The Middle Class in Ruins
第9题：
cooling the gas below the ignition point
cutting off the supply of oxygen
stopping the flow of gas
interrupting the chain reaction
第10题：
Slow down the spread of fire by cooling adjacent structures
Cover the fire with foam
Smother the fire with a blanket or similar object
Break up solid objects to ensure that any deep seated fires are extinguished