单项选择题

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

点击查看答案&解析

上一题目录下一题

相关考题

单项选择题

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

单项选择题

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

单项选择题

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