[D2L] 103H

Question 1

Arc Blast can produce temps up to 20,000C (35,000F) as well as…

a) Pressure Waves
b) Sound Waves
c) Molten Steel and Shrapnel
d) EM Waves
e) All of the above

Answer 1

All of the above

Question 2

What amount of current is enough to kill a person?

Answer 2

100 to 200 mA

Question 3

What is the purpose of a lockout system while working on electrical systems?

Answer 3

To prevent shocks and the accidental start-up of the equipment being serviced.

Question 4

what is the FIRST thing that must be done if an electrical shock occurs?

a) report the incident
b) send for qualified help
c) prevent further injury
d) remove the victim

Answer 4

remove the victim

Question 5

During an Arc Flash explosion copper can vapourize by a factor of..

Answer 5

67,000 times

Question 6

Which type of clothing material should never be worn while servicing electrical equipment?

Answer 6

synthetic

Question 7

The CSA Z462 specifies workplace electrical safety

Answer 7

True

Question 8

What are the 3 factors that determine the severity of an injury due to an arc flash?

Answer 8

time for breaker to trip,
proximity of worker
the heat energy produced by the arc flash

Question 9

Arc Flashes are often caused by Dust, Dirt, and Condensation

T or F

Answer 9

True

Question 10

Arc flash level

Answer 10

1. Electric Arc
2. Arc Flash
3. Arc Blast