单项选择题
A.fire fighting plan B.shipping articles C.Certificate of Inspection D.muster list
An advantage of an ABC dry chemical over a carbon dioxi...
单项选择题An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.
A.lack of toxicity B.the multipurpose extinguishing ability C.burn-back protection D.cooling ability
After using a Halon extinguisher，it should be（）.A.put b...
单项选择题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
After using a C02 portable extinguisher，it should be（）....
单项选择题After using a C02 portable extinguisher，it should be（）.
A.put back in service if some C02 remains B.hydrostatically tested C.retagged D.recharged
