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

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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

單項(xiàng)選擇題

Before any work on electrical or electronic equipment is performed, which of the following precautions should be carried out （）

A.De-energize the applicable switchboard bus
B.Bypass the interlocks
C.Secure and tag the supply circuit breaker in the open position
D.Station a man at the circuit supply switch