更多"The principal personnel hazard uniq"的相关试题:
[单项选择]Inspection of a Halon extinguisher involves checking the hose，handle，nozzle，and（）.
A. sight glass
B. weighing the extinguisher
C. service technicians report
D. last date it was charged
[单项选择]Due to the hazards involved with Halon extinguishers on a ship，the size II extinguisher may only be used（）.
A. outside
B. on class C fires
C. in an emergency
D. on class B fires
[单项选择]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
[单项选择]Halon extinguishes a fire by（）.
A. breaking the chain reaction
B. smothering the fire
C. cooling the fire
D. coating the fule with a nonflammable surface
[单项选择]Halon extinguishes fire primarily by（）.
A. cooling
B. smothering
C. shielding of radiant heat
D. breaking the chain reaction
[单项选择]Which characteristic of Halon is a disadvantage when it is used as a fire extinguishing medium?（）
A. Leaves a residue
B. Cost，relative to other agents
C. Breaks down while under prolonged storage
D. Conducts electricity
[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]Which characteristic is an advantage of Halon as a fire extinguishing medium?（）
A. Electrically non-conductive
B. Relatively inexpensive
C. Effective against chemicals containing an oxidizer
D. All of the above
[单项选择]Halon gas will decompose and may form very hazardous toxic fumes when discharged（）.
A. directly on flames
B. at room temperature
C. in an extremely cold climate
D. None of the above
[单项选择]Which is a disadvantage of Halon as a fire extinguishing medium?（）
A. Conducts electricity
B. Difficult to store
C. Large volume necessary to be effective
D. Ineffective in powdered metal fires
[单项选择]HALON灭火瓶适用于哪类火灾（）
A. A类
B. B类
C. C类
D. 以上都是
[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]After using a Halon extinguisher，it should be（）.
A. put back in service if more than 50% of the charge remains
B. repainted
C. discarded
D. recharged
[判断题]HALON灭火拼可以用来扑灭A、B、C三类火。
