更多"A class B fire is most successfully"的相关试题:
[单项选择]A class "B" fire would most likely occur in the （）.
A. main switchboard
B. engine room bilge
C. breathing compartment
D. electric fresh water transfer pump
[单项选择]On a class B fire，which portable fire extinguisher would be the LEAST desirable?（）
A. Carbon dioxide
B. Water (stored pressure)
C. Dry chemical
D. Foam
[单项选择]Dry chemical extinguishers extinguish class B fires to the greatest extent by（）.
A. cooling
B. smothering
C. oxygen dilution
D. breaking the chain reaction
[单项选择]A class "C" fire would most likely occur in the （）.
A. engine room bilges
B. main switchboard
C. paint locker
D. rag bin
[单项选择]On a class “B” fire，which portable fire extinguisher would be the LEAST desirable?（）
A. Carbon dioxide
B. Water (stored pressure)
C. Dry chemical
D. Foam
[单项选择]Halon from extinguishers used on a class B fire，should be directed（）.
A. at the top of the flames
B. at the base of the fire near the edge
C. in short quick bursts
D. toward the upwind side of the fire
[单项选择]If ignited，which material would be a class B fire?（）
A. Magnesium
B. Paper
C. Wood
D. Diesel Oil
[单项选择]Which of the listed classes of fire would most likely occur in the engine room of a vessel?（）
A. Classes A and B
B. Classes B and C
C. Classes C and D
D. Classes A and D
[单项选择]Halon extinguishers used on a class C fire should be directed at the（）.
A. base of the equipment
B. top of the equipment
C. power source
D. source of the fire
[单项选择]Portable foam type fire extinguishers are most effective on（）.
A. mattress fires
B. oil fires
C. wood fires
D. All of the above
[单项选择]Any extinguishing agent used on a Class C fire must have which important property?（）
A. Cooling ability
B. Leaves no residue
C. Penetrating power
D. Nonconductivity
[单项选择]A class C fire would be burning（）.
A. fuel oil
B. wood
C. celluloid
D. electrical insulation
[单项选择]The best method of extinguishing a class A fire is to （）.
A. remove oxygen from the area
B. smother fire with foam
C. smother fire with CO2
D. cool fuel below ignition temperature
[单项选择]The class of fire on which a blanketing effect is essential to extinguish the fire is （）.
A. class A
B. class B
C. class C
D. class D
[单项选择]Foam-type portable fire extinguishers are most useful in combating fires involving（）.
A. solid materials such as wood or bales of fiber
B. flammable liquids
C. electrical equipment
D. metallic solids
[单项选择]A foam-type portable fire extinguisher is most useful in fighting a fire in（）.
A. generators
B. oil drums
C. the bridge controls
D. combustible metals
[单项选择]What is the most vulnerable part of the fire main system on board an offshore rig?（）
A. The fire pump
B. Exposed hard piping
C. The hydrant valve
D. The fire hose
