Electrical Safety

Question 1

Which approach boundary has the highest risk of shock?

Answer 1

Prohibited approach boundary.

Question 2

Non melting, flammable materials with a fabric weight of at least 4.5 oz/yd2 is appropriate clothing for which hazard/risk category?

Answer 2

0

Question 3

What is defined as a barrier between the wearer or user and their work environment?

Answer 3

PPE

Question 4

What is the definition of a lockout?

Answer 4

When power or energy cannot flow due to the position of a disconnecting switch, circuit breaker, manually operated valve locked in position until work is complete, and the area is deemed safe.

Question 5

What do you use when locking out a piece of equipment?

Answer 5

A lock with only one key.

Question 6

Painful shock causing ventricular fibrillation of the heart is most often a fatal condition. This condition is caused by what level of current in mA?

Answer 6

100-200 mA

Question 7

If dangers cannot immediately be corrected, what three things do you do to prevent injury?

Answer 7

Warn people.
Put up barriers until danger can be controlled.
Post warning signs.

Question 8

What do you do before attending to a victim with electric shock?

Answer 8

Remove the victim.

Question 9

A frayed cord is an example of what kind of hazard?

Answer 9

Electrical hazard.

Question 10

What is a good safety step to ensure the correct switch has been locked out?

Answer 10

Test start.

Question 11

The basic compliance to CSA Z462 requirements have how many steps?

Answer 11

Five step process for safety and operability.

Question 12

Within the arc flash protection boundary where a worker is exposed to 1.2 calories/cm2 of incident energy the worker MUST?

Answer 12

Wear PPE to prevent 2nd degree burns in the event of an arc flash.

Question 13

What type of clothing is necessary for the required minimum arc rating of PPE

Answer 13

FR rated clothing and arc flash rated suit to meet the required minimum of 3 or more layers.

Question 14

When trades work on different parts of equipment, what must you do you do?

Answer 14

Lockout equipment.

Question 15

When a lock is installed on a switch or circuit breaker by the worker doing the repairs to the equipment, the lock must be?

Answer 15

Their own lock, with their own key.

Question 16

What amount of current causes ventricular fibrillation of the heart?

Answer 16

100 mA to 200 mA

Question 17

What is the distance that must be maintained while operating machinery near overhead power lines?

Answer 17

7 meters