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单选题
The discharge from a carbon dioxide fire extinguisher should be directed（）.
A
at the base of the flames
B
at the center of the flames
C
to the lee side of the flames
D
over the tops of the flames
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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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In the event of fire in a machinery space，______.A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failedB.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishmentC.water in any form should not be used as it will spread the fireD.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel
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A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged.It should be ______.A.replaced in its proper location if weight loss is no more than 15%B.replaced in its proper location if weight loss is no more than 25%C.labeled empty and recharged as soon as possibleD.labeled empty and replaced in its proper location regardless of weight
考题
The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．A.Forming a cloud cover over the flamesB.Directing the gas at the base of the flames in a slow sweeping motionC.Discharging the carbon dioxide into the heart of the flamesD.Bouncing the discharge off an adjacent bulkhead just above the burning surface
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______, as the chemical extinguisher agent, should be used for an electric fire.A.dry chemical or foamB.foam or soda acidC.carbon dioxide or foamD.carbon dioxide or dry chemical
考题
A carbon dioxide fire extinguisher should be recharged ______.A.at least annuallyB.whenever it is below its required weightC.only if the extinguisher has been usedD.before every safety inspection
考题
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
考题
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
考题
An engine compartment gasoline fire requires which type of extinguisher?______.A.Carbon dioxideB.Dry chemicalC.FoamD.All of the above
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A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.A
replaced in its proper location if weight loss is no more than 15%B
replaced in its proper location if weight loss is no more than 25%C
labeled empty and recharged as soon as possibleD
labeled empty and replaced in its proper location regardless of weight
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
考题
单选题Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.A
when the remaining charge volume is less than 90 percent of the required VOLUMEB
at each inspection for certificationC
at each annual inspectionD
when the weight loss exceeds 10% of weight of charge
考题
单选题An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.A
greater rangeB
effective on all types of firesC
cleanlinessD
All of the above
考题
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A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.A
labeled empty and recharged as soon as possibleB
replaced in its proper location if weight loss is no more than 25%C
replaced in its proper location regardless of weightD
replaced in its proper location if weight loss is no more than 15%
考题
单选题When fighting a fire on a bulkhead using a portable carbon dioxide extinguisher，the stream should be directed at the（）.A
base of the flames，moving the horn from side to side，following the flames upward as they diminishB
top of the flaming area，moving the horn from side to side，following the flames downward as they diminishC
center of the flaming area，moving the horn vertically from top to bottomD
bottom of the flaming area，moving the horn vertically to the top following the flames upward as they diminish
考题
单选题Which of the following statements is true concerning carbon dioxide when used as a fire extinguishing agent?（）A
Carbon dioxide is corrosive when exposed to fireB
Carbon dioxide should be applied slowly to a large engine room fireC
Its total cooling effect is far greater than waterD
Its smothering effect is excellent for class B fires
考题
单选题A carbon dioxide fire extinguisher should be recharged（）.A
at least annuallyB
whenever it is below its required weightC
only if the extinguisher has been usedD
before every safety inspection
考题
单选题A carbon dioxide fire extinguisher has been partially discharged, and should be immediately （）.A
tagged and restowed properly in its rackB
weighed and the charge loss recordedC
given to the chief engineer for rechargingD
tagged empty and stowed separately from charged extinguishers
考题
单选题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
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When using carbon dioxide to fight a fire on a bulkhead，the CO2 should be applied（）.A
first to the bottom of the flaming area，sweeping from side to side，and following the flames upwardB
in a circular motion from the middle of the bulkhead outwardC
to the top of the flaming area，sweeping from side to side，and working toward the bottomD
in an up-and-down motion from one side of the bulkhead to the other
考题
单选题In order to discharge a C02 portable fire extinguisher , the operator must first（）.A
invert the CO extinguisherB
squeeze the two trigger handles togetherC
remove the locking pinD
open the discharge valve
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