Round 3

Question 1

What is the function of a 59 device?

Answer 1

Overvoltage

Question 2

In the rare situation in which an employee who installed a lockout/tagout device is unable to remove that device, another person may remove it under the direction of the _____, provided that the ____ strictly adheres to the specific procedures outlined in the standard.

Answer 2

employer, employer

Question 3

What two conditions must be met for a protective relay device 67 to cause tripping?

Answer 3

Overcurrent in a predetermined direction

Question 4

A piece of wire that is 0.001 inches in diameter and 12 inches long is one mil-foot.(T/F)

Answer 4

True

Question 5

When the thermal memory is switched on for digital overcurrent protective devices (OCPDs) used on low-voltage circuit breakers, what effect will it have on the long time delay (LTD) operating time?

Answer 5

It will decrease LTD somewhat

Question 6

What must be provided in a confined space that is over 5 feet deep?

Answer 6

A mechanical means of retrieval

Question 7

Decreasing the opening time of the overcurrent protective device will decrease Arc-Flash hazards.(T/F)

Answer 7

True

Question 8

The neutral conductor is often grounded at the service entrance switchboard.(T/F)

Answer 8

True

Question 9

During a short-time delay test on a low voltage circuit breaker, you observe a trip time of 0.060 seconds at 1.5X pickup, your expected time was 0.200 seconds. What is most likely the problem?

Answer 9

Restraint signal

Question 10

Cabinets are electrical assemblies designed to be placed in panelboards.(T/F)

Answer 10

False

Question 11

Which one of the following is damaging to many insulating materials used in high-voltage rotating machines?

Answer 11

Corona

Question 12

A given 480V motor control center is fed by a transformer with an available fault current of 48kA and is protected by a circuit breaker with a fault clearing time of 0.025 seconds. According to NFPA 70E, which of the following would be considered an acceptable flash protection boundary for this equipment?

Answer 12

5 feet

Question 13

A relay device number 51 is connected to an 800/5 CT. The relay is set to time dial 3 and tap 10. What primary current must flow to cause the relay to start timing out?

Answer 13

1600A

Question 14

Which of the following batteries is also referred as a Leclanche Battery?

Answer 14

Carbon zinc

Question 15

A confined space entry permit must be signed by:

Answer 15

Trained individual acting as entry supervisor

Question 16

The top step of a tied-off ladder shall:

Answer 16

Not be used as a step

Question 17

An emergency transfer switch shall supply ______.

Answer 17

emergency loads

Question 18

Facing the low-voltage side of a transformer with additive polarity, where would you find X3?

Answer 18

Over the left shoulder

Question 19

The breaking capacity of a circuit breaker is usually expressed in:

Answer 19

MVA

Question 20

Conductive lube must be applied to circuit breaker stabs to keep__________ at a minimum in the circuit path.

Answer 20

resistance

Question 21

A UPS system would be best described by which of the following?

Answer 21

A system that converts AC to DC and then inverts DC back to AC

Question 22

The grounded conductor is one of the two conductors through which normal circuit current flows.(T/F)

Answer 22

True

Question 23

ASTM test method D971 measures which of the following?

Answer 23

mN/m

Question 24

When monitoring for confined space entries involving a descent into atmospheres that may be stratified, the atmospheric envelope should be tested a distance of approximately ____ in the direction of travel and to each side.

Answer 24

4 feet