5.0 Underground Power Equipment

Question 1

What is the above-ground portion of an underground electrical installation that includes padmount transformers and switching kiosks?
a. Overhead power lines
b. Distribution poles
c. Substation equipment
d. Underground service

Answer 1

D

Question 2

What is the function of padmount transformers and switching kiosks in an underground distribution system?
a. Transmitting high voltage electricity
b. Switching between primary and secondary power
c. Serving as the above-ground portion
d. Insulating power lines

Answer 2

C

Question 3

What types of electrical power can underground cables carry in an underground distribution system?
a. Primary and secondary
b. Tertiary and quaternary
c. High voltage only
d. Low voltage only

Answer 3

A

Question 4

What is the typical depth at which underground cables are buried in an underground distribution system?
a. 3 meters (10 feet)
b. 1 meter (3 feet)
c. 5 meters (16 feet)
d. Varies based on topsoil cover

Answer 4

B

Question 5

Why is it impossible to predict the location of underground cables without using a detector?
a. They are invisible
b. Changes in topsoil cover can affect the depth
c. Cables are constantly moving
d. Underground power lines are too complex

Answer 5

B

Question 6

What should an emergency responder do if a padmount transformer or switching kiosk shows evidence of tampering, such as hacksaw marks or severe dents, or is found open?
a. Approach cautiously and attempt to close it
b. Assess the situation from at least 10 meters back
c. Open it to inspect the internal damage
d. Call a local mechanic for repairs

Answer 6

B

Question 7

In the event of a padmount transformer or switching kiosk being damaged in a vehicle accident, what should the emergency responder do?
a. Immediately attempt repairs
b. Call the local electrical utility and wait for their instructions
c. Direct occupants to exit the vehicle and move away
d. Ignore the situation and continue with other tasks

Answer 7

B

Question 8

Why is it important to keep feet close together when approaching a vehicle that has damaged a padmount transformer or switching kiosk?
a. To perform a quick escape
b. To avoid tripping hazards
c. To minimize the risk of electric shock due to step potential
d. To maintain proper posture

Answer 8

C

Question 9

What action should be taken if occupants of a vehicle involved in an accident with a padmount transformer are conscious?
a. Instruct them to stay in the vehicle and contact the electrical utility
b. Ask them to exit the vehicle immediately
c. Attempt to remove them from the vehicle
d. Leave the area and wait for help

Answer 9

A

Question 10

How should verbal instructions from electrical utility personnel be confirmed by emergency responders?
a. Disregard the instructions
b. Repeat the message back through three-way communication techniques
c. Assume understanding without confirmation
d. Follow instructions without further communication

Answer 10

B

Question 11

What is the first action an emergency responder should take when an underground live power line is damaged by digging machinery?
a. Approach the scene to assess the situation closely
b. Call the local electrical utility immediately
c. Instruct the machine operator to shut down the equipment
d. Attempt to isolate the damaged area from the public

Answer 11

B

Question 12

Why is it essential to determine the safe zone and secure the area when dealing with a damaged underground power line?
a. To allow closer inspection of the damage
b. To ensure the safety of emergency responders and the public
c. To assist in repairing the power line
d. To facilitate communication with the electrical utility

Answer 12

B

Question 13

What should an emergency responder instruct the operator of the digging machinery to do after a live power line is damaged?
a. Shut down the machine immediately and exit
b. Continue working while maintaining caution
c. Move away from the machine to a safe distance
d. Stay in the machine and await further instructions

Answer 13

D

Question 14

In the event of a damaged underground power line, what is the recommended waiting period for electrical utility personnel to isolate and de-energize the line?
a. 5 minutes
b. 15 minutes
c. Wait until it’s safe to proceed
d. 30 minutes

Answer 14

C

Question 15

What is the first action an emergency responder should take when a vault is emitting fire, smoke, or fumes?
a. Attempt to open the service access cover
b. Assess the situation from a safe distance
c. Enter the vault to investigate
d. Instruct the public to approach cautiously

Answer 15

B

Question 16

What is the primary requirement for electrical utility personnel working in underground electrical vaults identified as confined spaces?
a. Specialized training only
b. Conformance with general safety guidelines
c. Adherence to confined space entry procedures
d. A basic understanding of electrical systems

Answer 16

C

Question 17

When could emergency responders be called upon to perform a rescue in an underground electrical vault?
a. Anytime they are available
b. Only during regular working hours
c. In case of unforeseen circumstances or oversights
d. When there is a scheduled maintenance outage

Answer 17

C

Question 18

What is the crucial precondition for emergency responders to enter an electrical vault for rescue purposes?
a. Prior approval from local authorities
b. A written request from utility personnel
c. Confirmation that electrical equipment is de-energized
d. Availability of general safety guidelines

Answer 18

C

Question 19

According to provincial legislation, what should emergency responders possess to perform a rescue in an electrical vault?
a. Basic knowledge of electrical systems
b. Physical fitness and agility
c. Specialized training and equipment
d. Previous experience in confined spaces

Answer 19

C

Question 20

What is the recommended approach for emergency responders entering an electrical vault for rescue?
a. Enter as quickly as possible to minimize exposure
b. Wait for utility personnel to initiate the rescue
c. Rely on basic first aid techniques without specialized training
d. Perform the rescue without waiting for confirmation of de-energization

Answer 20

B