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Flashcards in Electrical Safety Deck (9)
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1
Q

What health hazard is presented by electrical current flowing through the body?

A

It may cause injury by heating tissue, It may disrupt the electrical functions of cells, It may cause involuntary muscle contractions, (All of these choices are correct)

2
Q

In the United States, what is connected to the green wire in a three-wire electrical AC plug?

A

Equipment ground

3
Q

What is a good way to guard against electrical shock at your station?

A

Use three-wire cords and plugs for all AC powered equipment, Connect all AC powered station equipment to a common safety ground, Use a circuit protected by a ground-fault interrupter, (All of these choices are correct)

4
Q

What is the purpose of a fuse in an electrical circuit?

A

To interrupt power in case of overload

5
Q

Why is it unwise to install a 20-ampere fuse in the place of a 5-ampere fuse?

A

Excessive current could cause a fire

6
Q

What safety equipment should always be included in home-built equipment that is powered from 120V AC power circuits?

A

A fuse or circuit breaker i series with the AC hot conductor

7
Q

What kind of hazard might exist in a power supply when it is turned off and disconnected?

A

You might receive an electric shock from the charge stored in large capacitors

8
Q

Which of the following is a safety hazard of a 12-volt storage battery?

A

Shorting the terminals can cause burns, fire, or an explosion

9
Q

What can happen if a lead-acid storage battery is charged or discharged too quickly?

A

The battery could overheat, give off flammable gas, or explode