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单选题
Halon fire extinguishers are NOT effective when used on which types of fires?（）
A
Fires in electrical equipment
B
Flammable oils and greases
C
Class A fires in ordinary combustibles
D
Materials containing their own oxygen
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When inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required?A.The supervisor in charge of the dock to which the barge is tied upB.Part 38 of the Rules and Regulations for Tank VesselsC.The Certificate of Inspection of the bargeD.The local fire marshal
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All portable fire extinguishers must be capable of being ______.A.carried by hand to a fireB.carried or rolled to a fireC.recharged in the fieldD.used on class “B” fire
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CO2 and Halon extinguishers are used for electrical fire, as well as （）fire.A、commonB、oilC、electricalD、chemical
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单选题Fire extinguishers on inspected vessels 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Portable foam type fire extinguishers are most effective on（）.A
mattress firesB
oil firesC
wood firesD
All of the above
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单选题What is an advantage of using foam in fire fighting?（）A
It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)B
Most foams can be used with dry chemicals to attack a fire by two methodsC
Foam is effective on combustible metal firesD
Foam can be made with seawater or fresh water
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单选题A high-velocity fog stream can be used in fire fighting situations to drive heat and smoke ahead of the fire fighters in a passageway. This technique should only be used when（）.A
using a 2-1/2 inch hoseB
there is an outlet for the smoke and heatC
the fire is totally contained by the ship's structureD
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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
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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
考题
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 inspecting a tank barge to see that it has all the required fire extinguishers and other safety items aboard，which of the following is the best source for determining what is required? （）A
The supervisor in charge of the dock to which the barge is tied upB
Part 38 of the Rules and Regulations for Tank VesselsC
The Certificate of Inspection of the bargeD
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考题
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
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单选题When choosing extinguishers to fight a Class “B” fire do NOT use（）.A
carbon dioxideB
dry chemicalC
foam (stored-pressure type)D
water (cartridge-operated)
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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
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source of the fire
考题
单选题Halon extinguishes fire primarily by（）.A
coolingB
smotheringC
shielding of radiant heatD
breaking the chain reaction
考题
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
考题
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
考题
单选题When used to fight fire，carbon dioxide（）.A
is effective if used promptly on an oil fireB
has a greater cooling effect than waterC
is lighter than airD
is harmless to cargo and crew
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单选题Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge（）.A
only when fully loadedB
if one or more tanks are fullC
when transferring cargoD
only when the barge is being towed
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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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