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单选题
CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.
A
common
B
oil
C
electrical
D
chemical
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Carry （）（手提灭火器）to the fire place.A、extinguishersB、portable extinguishersC、dry foam extinguishersD、CO2 extinguishers
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单选题Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.A
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the smallestC
the most accessibleD
the most effective
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单选题Halon fire extinguishers are NOT effective when used on which types of fires?（）A
Fires in electrical equipmentB
Flammable oils and greasesC
Class A fires in ordinary combustiblesD
Materials containing their own oxygen
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单选题There are two disadvantages to CO2 pump as a firefighting agent. One of these is the limited quantity available，and the other is（）.A
the lack of cooling effect on heated materialsB
that it cannot be used in a dead ship situation with no electrical power to the CO2 pumpC
that it breaks down under extreme heat to form poisonous gasesD
there is no effect on a class A fire even in an enclosed space
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单选题The principal personnel hazard unique to Halon extinguishers is（）.A
displacement of oxygenB
skin irritationC
inhaling toxic vaporsD
eye irritation
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单选题If a CO2 fire extinguisher is not readily available, which of the listed fire extinguishers would be best suited to combat a small electrical fire in a switchboard?（）A
Dry chemicalB
HalonC
Low velocity fogD
Steam
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单选题Fire extinguishers of sizes III，IV，and V are designated as（）.A
portableB
semi-portableC
fixedD
disposable
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单选题Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?（）A
Leaves a residueB
Cost，relative to other agentsC
Breaks down while under prolonged storageD
Conducts electricity
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单选题Fire extinguishers used on ship’s are numbered by size I through V，with I being（）.A
used for electrical fires onlyB
the smallestC
the most accessibleD
the most effective
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单选题When fighting an electrical fire, you should first （）.A
stop ventilation to the areaB
stop the vesselC
secure electricity to the circuitD
apply CO2 to the fire
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单选题Which of the following statements is true concerning Halon 1301 fire extinguishing equipment?（）A
The agent is considered nontoxic at room temperature in low concentrationsB
The agent is less effective than carbon dioxideC
Halon primarily extinguishes the fire by coolingD
The agent cannot be used on electrical fires because it leaves a residue
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单选题Which of the listed fire extinguishers is recommended for use on an electrical switchboard fire?（）A
CO2B
ABC dry chemicalC
CO2 propelled foamD
All of the above
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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
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单选题Halon extinguishers used on a class C fire should be directed at the（）.A
base of the equipmentB
top of the equipmentC
power sourceD
source of the fire
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单选题Halon extinguishes fire primarily by（）.A
coolingB
smotheringC
shielding of radiant heatD
breaking the chain reaction
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单选题Halon from extinguishers used on a class B fire，should be directed（）.A
at the top of the flamesB
at the base of the fire near the edgeC
in short quick burstsD
toward the upwind side of the fire
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单选题Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.A
outsideB
on class C firesC
in an emergencyD
on class B fires
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单选题Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?（）A
Use the CO2 system and evacuate the engine roomB
Use the fire main system and evacuate the engine roomC
Evacuate the engine room and use the CO2 systemD
Evacuate the engine room and use the fire main system
考题
单选题Portable CO2 fire extinguishers should NOT be used to inert a space containing flammable liquids due to the danger of（）.A
the CO2 being inhaled by personnelB
reflash of burning liquidsC
vapor condensation on the extinguisherD
the discharge causing a static spark
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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