更多"An ABC dry chemical fire extinguish"的相关试题:
[单项选择]An ABC dry chemical fire extinguisher would be least effective against a fire in（）.
A. a mattress
B. spilled liquids such as oil or paint
C. high voltage electrical gear
D. a trash can
[单项选择]An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
A. a mattress
B. spilled liquids such as oil or paint
C. high voltage electrical gear
D. a trash can
[单项选择]A portable dry chemical fire extinguisher discharges by（）.
A. gravity when the extinguisher is turned upside down
B. pressure from a small CO2 cartridge on the extinguisher
C. air pressure from the hand pump attached to the extinguisher
D. pressure from the reaction when water is mixed with the chemical
[单项选择]When must a dry chemical fire extinguisher be recharged?（）
A. After each use
B. When the air temperature exceeds 90°F
C. Every 6 months
D. Every 12 months
[单项选择]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
[单项选择]（）as the chemical extinguisher agent, should be used for a an electric fire.
A. Dry chemical or foam
B. Foam or soda acid
C. carbon dioxide or foam
D. carbon dioxide or dry chemical
[单项选择]When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.
A. over the top of the flames
B. off a bulkhead into the fire
C. in front of the fire
D. at the base of the fire
[单项选择]Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
A. cooling
B. smothering
C. oxygen dilution
D. breaking the chain reaction
[单项选择]Dry chemical fire extinguishers are effective on which type(s) of fire?（）
A. Burning oil
B. Electrical
C. Paint
D. All of the above
[单项选择]A class C fire would be burning（）.
A. fuel oil
B. wood
C. celluloid
D. electrical insulation
[单项选择]Which of the listed classes of fire 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
[单项选择]A fire involving aluminum powder would be a class （）.
A. "A" fire
B. "B" fire
C. "C" fire
D. "D" fire
[单项选择]A foam-type portable fire extinguisher would be most useful in combating a fire in（）.
A. solid materials such as wood or bales of fiber
B. flammable liquids
C. a piece of electrical equipment
D. combustible metallic solids
[单项选择]A class "C" fire would occur in （）
A. bedding
B. pipe insulation
C. paint
D. a generator
