specific hazards working with transformers

Question 1

OSHA does not require a written job briefing if a worker is working alone.

Answer 1

true

Question 2

The ? fuse reduces nuisance fuse blowing due to transients such as lighting.

Answer 2

t-link

Question 3

Back-feed will only occur on a transformer if full secondary voltage is applied from X1 to X3.

Answer 3

false

Question 4

A transformer tank may become energized on a single-bushing transformer if the tank is not grounded and a back-feed situation happens.

Answer 4

true

Question 5

A current-limiting fuse in series with the cutout will ?

Answer 5

reduce the risk of violent transformer failure

Question 6

The current available out of the primary bushings is always twice the secondary current.

Answer 6

false

Question 7

Installing a transformer over a hot secondary with the leads installed ? .

Answer 7

should never be done

Question 8

The primary voltage and the ? rating of the transformer are two factors that determine the fuse size.

Answer 8

kva

Question 9

A company specifies the ? and ? of a fuse to be used in a transformer.

Answer 9

size / speed

Question 10

When it blows open, the internal primary fuse of a CSP will deenergize everything above it to the main line.

Answer 10

false

Question 11

It is not a recommended practice to use a CSP as part of a bank of transformers.

Answer 11

true

Question 12

To energize a transformer, a load-break elbow on an underground transformer should be inserted by hand.

Answer 12

false

Question 13

Paint discoloration on an overhead transformer may be a sign of ?

Answer 13

overheating

Question 14

External damage to a transformer tank may include ?

Answer 14

damaged bushings, leaking oil, and bulged tank.