YEAR ACTUAL EXAM WITH VERIFIED

IEC 4 TH

YEAR ACTUAL EXAM WITH VERIFIED

QUESTIONS AND CORRECT ANSWERS ||

GUARANTEED PAS S | ALREADY GRADED A + |

LATEST VERSION /

What is the demand load for eighty receptacles located in a 15,000-square-foot office building?

Select one:

• 15,000
• 12,200
• 180
• 14,400 - ANSWER-a. 15,000

For a fire alarm system, an SLC ___ allowed to be T-Tapped.

Select one:

• is
• is not - ANSWER-a. is

A ___ is an example of a fire alarm system initiating device.

Select one:

• bell
• heat detector - ANSWER-b. heat detector 1 / 4

Determine the minimum size THW copper branch-circuit conductors the NEC® requires to feed a 3-phase, continuous duty motor that draws 70 amps per phase.Assume terminations are rated at 75ºC.

Select one:

• 4 AWG
• 2 AWG
• 3 AWG
• 1 AWG - ANSWER-c. 3 AWG

A feeder supplying two continuous duty, induction type, Design B, 208-volt, three- phase motors (one 10 hp and one 71/2 hp) shall have a minimum ampacity of ___ amperes.

Select one:

• 62.7
• 55
• 68.75
• 38.5 - ANSWER-a. 62.7

An attachment plug and receptacle may be permitted to serve as a motor controller if the motor is portable and has a maximum rating of ___ hp.

Select one:

• 1/3
• 1/4
• 2
• 1/2
• 1/8 - ANSWER-a. 1/3 2 / 4

Where motors are provided with terminal housings, the housings shall be ___ and of substantial construction. I. nonmetallic II. metal

Select one:

• I only
• II only
• either I or II
• neither I nor II - ANSWER-b. II only

Branch-circuit conductors that supply a single motor used in a continuous duty application shall have an ampacity of not less than ___ of the motor's full-load current rating as determined by 430.6(A)(1).

Select one:

• 190%
• 150%
• 50%
• 58%
• 125% - ANSWER-e. 125%

What is the full load current of a 30 hp, 230-volt, 3-phase, synchronous motor with a 90% power factor?

Select one:

• 76.23 amps
• 86.62 amps
• 63 amps
• 69.3 amps - ANSWER-d. 69.3 amps
• / 4

Determine the minimum size THWN copper feeder conductors required by the NEC® to supply the following 480-volt, continuous duty, 3-phase, induction-type, design B motors* 1 - 40 hp * 1 - 50 hp * 1 - 60 hp

Select one:

• 3/0 AWG
• 4/0 AWG
• 250 kcmil
• 2/0 AWG - ANSWER-b. 4/0 AWG

What size THHN copper transformer secondary conductors will be required to feed a 3-phase, 30 hp, 480-volt motor load? The secondary conductors terminate at a fusible disconnect with 70-amp fuses. The - transformer primary is supplied by a 12,470-volt circuit protected with 10-amp fuses.

Select one:

• 3
• 10
• 6
• 4
• 8 - ANSWER-d. 4

A 50 hp 230-volt, 3-phase squirrel cage motor has a full-load current of ___ amps.

Select one:

• 143
• 802
• 130
• 114
• 179 - ANSWER-c. 130
• / 4