更多"Before attempting to put out a clas"的相关试题:
[单项选择]If a small fire initially breaks out in the engine room bilges, in which of the following sequences should the fire extinguishing agents or systems be used?（）
A. Fixed CO2,semi-portable CO2, then hand portable CO2
B. Semi-portable CO2, fixedCO2, then hand portable CO2
C. Hand portable, semi-portable CO2, then as a last resort the fixed CO2 system
D. Hand portable, fixed CO2, then as a last resort the semi-portable CO2
[单项选择]A fire has broken out on the stern of your vessel. You should maneuver your vessel so the wind （）.
A. comes over the bow
B. blows the fire back toward the vessel
C. comes over the stern
D. comes over either beam
[单项选择]Water can’t be used to put out fires of （）
A. Class A
B. Class B
C. Class C
D. B+C
[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]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]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]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] package foo； public class Outer （ public static class Inner （ ） ） Which statement is true？（）
A. An instance of the Inner class can be constructed with “new Outer.Inner（）”
B. An instance of the inner class cannot be constructed outside of package foo.
C. An instance of the inner class can only be constructed from within the outer class.
D. From within the package bar， an instance of the inner class can be constructed with “new inner（）”
[单项选择]The（）into the fire accident was carried out by two policemen.
A. question
B. doubt
C. investigation
D. information
[单项选择]A class B fire is most successfully fought by（）.
A. preventing oxygen from reaching the burning material
B. cooling the burning material below its ignition temperature
C. using the extinguishing agent to make the burning material fire-resistant
D. using the extinguishing agent to absorb the heat
[单项选择]If ignited，which material would be a class B fire?（）
A. Magnesium
B. Paper
C. Wood
D. Diesel Oil
