单项选择题
A.6 months B.1 year C.3 years D.Until the next inspection for certification
Each crewmember has an assigned firefighting station. T...
单项选择题Each crewmember has an assigned firefighting station. This assignment is shown on the（）.
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
