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单选题
An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.
A
greater range
B
effective on all types of fires
C
cleanliness
D
All of the above
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Which of the following is (are)an advantage of a dry chemical extinguisher over a carbon dioxide extinguisher？The dry chemical extinguisher：Ⅰ．Has a greater range．Ⅱ．Provides a heat shield for the operator．A.ⅠonlyB.ⅡonlyC.Both Ⅰand ⅡD.Neither Ⅰ nor Ⅱ
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An ABC dry chemical fire extinguisher would be LEAST effective against a fire in ______.A.a mattressB.spilled liquids such as oil or paintC.high voltage electrical gearD.a trash can
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An advantage of a dry chemical over a carbon dioxide fire extinguisher is its ______.A.greater rangeB.effectiveness on all types of firesC.cleanlinessD.All of the above
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An advantage of an ABC dry chemical over a carbon dioxide fire extinguisher is ______.A.lack of toxicityB.the multipurpose extinguishing abilityC.burn-back protectionD.cooling ability
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As compared to carbon dioxide, dry chemical has which advantage? ______.A.CleanerB.Effective on metal firesC.Greater rangeD.More cooling effect
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An engine compartment gasoline fire requires which type of extinguisher?______.A.Carbon dioxideB.Dry chemicalC.FoamD.All of the above
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单选题Which extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）A
Alcohol foamB
Dry chemicalC
Chemical foamD
Water fog
考题
单选题A fuel line breaks, sprays fuel on the hot exhaust manifold, and catches fire. Your first action should be to（）.A
Batten down the engine roomB
start the fire pumpC
apply carbon dioxide to the fireD
shut off the fuel supply
考题
单选题As compared to carbon dioxide，dry chemical has which advantage?（）.A
CleanerB
Effective on metal firesC
Greater rangeD
More cooling effect
考题
单选题The discharge from a carbon dioxide fire extinguisher should be directed（）.A
at the base of the flamesB
at the center of the flamesC
to the lee side of the flamesD
over the tops of the flames
考题
单选题An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.A
lack of toxicityB
the multipurpose extinguishing abilityC
burn-back protectionD
cooling ability
考题
单选题Flames from small leaks of LFG may be extinguished by（）.A
utilizing carbon dioxide or dry chemical fire extinguishersB
utilizing soda and acid fire extinguishersC
blowing the flames outD
letting it burn itself out
考题
单选题What is an advantage of using foam in fire fighting?（）A
It is effective in controlling fire in flowing oil such as coming from a broken fuel lineB
It absorbs heat from materials that could cause reignitionC
Most foams can be used jointly with dry chemical extinguishing agents to attack a fire by two methods of extinguishmentD
Once the surface is blanketed with foam and the fire is extinguished，no further foam is required
考题
单选题Weight is considered during the periodic required inspection and servicing of（）.A
CO2 (carbon dioxide) fire extinguishersB
foam fire extinguishersC
water (stored pressure) fire extinguishersD
All of the above
考题
单选题（）as the chemical extinguisher agent, should be used for a an electric fire.A
Dry chemical or foamB
Foam or soda acidC
carbon dioxide or foamD
carbon dioxide or dry chemical
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单选题What is best suited for fighting a fire in a ballast control room?（）A
Automatic sprinkler systemB
Steam smothering systemC
Dry chemical systemD
Carbon dioxide system
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单选题The type of extinguisher which should be used for an electricity fire is（）.A
foam or soda acidB
dry chemical or foamC
carbon dioxide or dry chemicalD
carbon dioxide or foam
考题
单选题As compared to carbon dioxide,dry chemical has which advantage?（）.A
CleanerB
EffectiveC
Greater rangeD
More cooling effect
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单选题According to the Chemical Data Guide，when burning，the grade B flammable liquid，carbon disulfide produces（）.A
phosgene gasB
sulfuric acid gasC
sulfur dioxide gasD
carbon tetrachloride
考题
单选题Carbon dioxide as a fire fighting agent has which advantage over other agents?（）.A
It causes minimal damageB
It is safe for personnelC
It is cheaperD
It is most effective on a per unit basis
考题
单选题Which types of portable fire extinguishers are designed for use on electrical fires?（）A
Dry chemical and carbon dioxideB
Foam (stored pressure) and soda-acidC
Carbon dioxide and foam (stored pressure)D
Dry chemical and soda-acid
考题
单选题An ABC dry chemical fire extinguisher would be LEAST effective against a fire in（）.A
a mattressB
spilled liquids such as oil or paintC
high voltage electrical gearD
a trash can
考题
单选题When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.A
over the top of the flamesB
off a bulkhead into the fireC
in front of the fireD
at the base of the fire
考题
单选题Why should you wear a self-contained breathing apparatus before entering the engine room after the fixed CO2 system has been discharged to combat a major fire?（）A
Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiationB
Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gasC
Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gasD
This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
考题
单选题Dry chemical fire extinguishers are effective on which type(s) of fire?（）A
Burning oilB
ElectricalC
PaintD
All of the above
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