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
更多“A carbon dioxide fire extinguisher should be recharged（）.”相关的问题
A、aldehydes and carbon dioxide B、water vapor and carbon monoxide C、nitrogen and carbon monoxide D、water vapor and carbon dioxide
A、Carbon dioxide is corrosive when exposed to fire B、Carbon dioxide should be applied slowly to a large engine room fire C、Its total cooling effect is far greater than water D、Its smothering effect is excellent for class B fires
A、Because carbon dioxide dilutes the oxygen concentration in the atmosphere and may cause asphyxiation B、Because carbon dioxide breaks down in a fire into carbon monoxide which may cause blood poisoning in the person breathing this gas C、Because carbon dioxide is a colorless and odorless gas that becomes highly toxic in the presence of high temperatures and will quickly incapacitate a person exposed to this gas D、This action is unnecessary as carbon dioxide is not poisonous nor toxic but is a relatively harmless gas
A、dry chemical or foam B、foam or soda acid C、carbon dioxide or foam D、carbon dioxide or dry chemical
A、Dry chemical or foam B、Foam or soda acid C、carbon dioxide or foam D、carbon dioxide or dry chemical
A、foam or soda acid B、dry chemical or foam C、carbon dioxide or dry chemical D、carbon dioxide or foam
A、foam or soda acid B、dry chemical or foam C、carbon dioxide or dry chemical D、carbon dioxide or foam
A、Dry chemical and carbon dioxide B、Foam (stored pressure) and soda-acid C、Carbon dioxide and foam (stored pressure) D、Dry chemical and soda-acid
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