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

你可能感興趣的試題

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