Safety

Question 1

What is division 1 and division 2 of flammable/combustible materials

Answer 1

Flammable gas and flammable liquids

Question 2

What class and symbol of fire extinguisher should be used for flammable liquids and gases?

Answer 2

Class B red square

Question 3

What’s the safety standard for protective footwear?

Answer 3

CAN/CSA Z195-02

Question 4

What’s the safety standard for head protection?

Answer 4

CAN/CSA Z94.1-05

Question 5

What fines may be imposed for not following OHS safety?

Answer 5

$100 - $500

Question 6

hard-laid and soft-laid rope

Answer 6

Tightly twisted and loosely twisted rope

Question 7

Rope strength reduction due to different kind of knots

Answer 7

knotted - 50%
bent - 50%
hitched - 75%
spliced - 85%

Question 8

Effects of an arc flash

Answer 8

Copper expansion by 67,000x
Noise up to 165dB
Radiation
Toxic vapour
Shrapnel and pressure blast

Question 9

Arc duration

Answer 9

Time it takes for the electrical protection devices to trip

Question 10

Working distance for arc flash risk assessment

Answer 10

High voltage switch gear - 36”
Low voltage switch gear - 24”
Low voltage motor control center - 18”

Question 11

What was B52-05 created to protect

Answer 11

U, the customer, and the public