更多"A carbon dioxide fire extinguisher "的相关试题:
[单项选择]A carbon dioxide fire extinguisher should be recharged（）.
A. at least annually
B. whenever it is below its required weight
C. only if the extinguisher has been used
D. before every safety inspection
[单项选择]Portable carbon dioxide fire extinguishers should be sent ashore to be recharged （）.
A. when the remaining charge volume is less than 90 percent of the required VOLUME
B. at each inspection for certification
C. at each annual inspection
D. when the weight loss exceeds 10% of weight of charge
[单项选择]The discharge from a carbon dioxide fire extinguisher should be directed（）.
A. at the base of the flames
B. at the center of the flames
C. to the lee side of the flames
D. over the tops of the flames
[单项选择]Carbon dioxide as a fire fighting agent has which advantage over other agents? （）
A. It causes minimal damage
B. It is safer for personnel
C. It is cheaper
D. It is most effective on a per unit basis
[单项选择]After a fire has been extinguished in a closed space, personnel may safely enter the space when （）.
A. smoke density has been decreased sufficiently to see the bulkhead opposite the compartments entrance
B. a lifeline and explosion proof flash light are used
C. all smoke and toxic fumes are removed and an adequate oxygen supply is present
D. overhaul has been completed to remove any possible source of re-ignition
[单项选择]When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
A. air from contacting the oil vapors
B. permitting re-ignition boiling of the heated oil
C. spontaneous combustion below the oil surface
D. toxic fumes from escaping to the surface
[单项选择]A fire hose has a（）.
A. male coupling at both ends
B. female coupling at both ends
C. female coupling at the nozzle end and a male coupling at the hydrant end
D. male coupling at the nozzle end and a female coupling at the hydrant end
[单项选择]If there has been a fire in a closed unventilated compartment it may be unsafe to enter because of （）.
A. unburned carbon particles
B. excess nitrogen
C. a lack of oxygen
D. excess hydrogen
[单项选择]A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
A. replaced in its proper location if weight loss is no more than 15%
B. replaced in its proper location if weight loss is no more than 25%
C. labeled empty and recharged as soon as possible
D. labeled empty and replaced in its proper location regardless of weight
[单项选择]A vessel has been damaged by fire. The survey shows the cost of repairs will exceed the value of the repaired vessel. This is an example of a(n)（）.
A. constructive total loss
B. salvage loss
C. actual loss
D. preferred loss
[单项选择]As compared to carbon dioxide，dry chemical has which advantage?（）
A. Cleaner
B. Effective on metal fires
C. Greater range
D. More cooling effect
[单项选择]Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
A. Water
B. Foam
C. Dry chemical
D. Carbon Dioxide
