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單項(xiàng)選擇題

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

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

Accumulations of oily rags should be（）.

A.kept in nonmetal containers
B.discarded as soon as possible
C.cleaned thoroughly for reuse
D.kept in the paint locker