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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 solid
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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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单选题A portable foam fire extinguisher is placed in operation by（）A
turning it upside downB
pressing the foam leverC
squeezing the grip handleD
opening the hose valve
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solid materials such as wood or bales of fiberB
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generatorsB
oil drumsC
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combustible metals
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单选题Foam-type portable fire extinguishers are most useful in combating fires involving（）.A
solid materials such as wood or bales of fiberB
inflammable liquidsC
electrical equipmentD
metallic solids
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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How do you operate a portable CO2 fire extinguisher?（）A
Point the horn downB
Turn cylinder upside-downC
Break the rupture discD
Pull pin，squeeze grip
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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
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generatorsB
oil drumsC
the bridge controlsD
combustible metals
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单选题Which portable fire extinguisher should be used on a class C fire on board a vessel?（）A
Carbon dioxideB
Water (stored pressure)C
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单选题On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）A
Carbon dioxideB
Water (stored pressure)C
Dry chemicalD
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单选题A foam-type portable fire extinguisher would be most useful in combating a fire in（）.A
soild materials such as wood or bales of fiberB
flammable liquidsC
a piece of electrical equipmentD
combustible metallic solids
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单选题A portable dry chemical fire extinguisher discharges by（）.A
gravity when the extinguisher is turned upside downB
pressure from a small CO2 cartridge on the extinguisherC
air pressure from the hand pump attached to the extinguisherD
pressure from the reaction when water is mixed with the chemical
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单选题关闭所有防火门并使用干粉灭火器。（）A
Close all fire doors and use the dry powder extinguisher.B
Close all fire doors and use the foam extinguisher.C
Close all fire doors and use the CO2 extinguisher.D
Close all fire rooms and use the dry powder extinguisher.
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单选题Which types of portable extinguisher should you watch for the reflash of the fire?（）A
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spilled liquids such as oil or paintC
high voltage electrical gearD
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generatorsB
oil drumsC
the bridgeD
combustible metals
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单选题Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）A
Check the tag to see when the extinguisher was last chargedB
Release a small amount of CO2; if the CO2 discharges，the extinguisher is acceptableC
Weigh the extinguisher and compare the weight against that stamped on the valveD
Recharge the extinguisher at least once each year
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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
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单选题What is the best title for this passage?A
The Dangers of a Fire.B
The Cause of a Fire.C
Learn to Use a Fire Extinguisher.D
Be Ready for a Fire.
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单选题Each hand portable fire extinguisher must be marked with（）.A
the name of the vessel on which it is locatedB
the date that it was installedC
the names of the individuals qualified to use itD
an identification number
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