單項(xiàng)選擇題

When there is a fire in a large electric motor, normally the very FIRST step is to （）

A.secure the electric supply
B.ventilate area to remove smoke
C.start the fire pump and lead out hose
D.apply foam

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單項(xiàng)選擇題
When working on a high voltage circuit, you should always have another person present with you.This person should have a good working knowledge of （）
A.the circuit being worked on and the location of all switches and circuit breakers controlling it
B.first-aid techniques for treating electrical shock
C.cardiopulmonary resuscitation (CPR)
D.All of the above
單項(xiàng)選擇題
An emergency generator, driven by an internal combustion engine, shall be tested under load for a minimum of 2 hours at least once every （）
A.week
B.2 weeks
C.month
D.3 months

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