單項(xiàng)選擇題An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.

A.lack of toxicity
B.the multipurpose extinguishing ability
C.burn-back protection
D.cooling ability


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2.單項(xiàng)選擇題After an accident the victim may go into shock and die. What should be done to help prevent shock?（）

A.Slightly elevate the head and feet
B.Keep the person awake
C.Keep the person lying down and at a comfortable temperature
D.Give the person a stimulant to increase blood flow

3.單項(xiàng)選擇題According to the T-Boat regulations the reason for providing adequate ventilation for a battery storage area is to prevent（）.

A.accumulation of carbon dioxide gas that chokes the battery
B.accumulation of explosive and toxic gases the battery can generate
C.mildew or dry rot in the battery box
D.battery failure including battery case meltdown caused by excessive heat

4.單項(xiàng)選擇題A crew member is unconscious and the face is flushed. You should（）.

A.lay the crew member down with the head and shoulders slightly raised
B.administer a liquid stimulant
C.lay the crew member down with the head lower than the feet
D.attempt to stand the crew member upright to restore consciousness

5.單項(xiàng)選擇題A crew member is having an epileptic convulsion. You should（）.

A.give the victim artificial respiration
B.completely restrain the victim
C.give the victim one 30 mg. tablet of phenobarbital
D.keep the victim from injuring him or herself