IEC Final Review Year 3 | 2026/2027 Questions & Answers Rated A+

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IEC FINAL REVIEW YEAR 3 QUESTIONS
AND ANSWERS RATED A+.

___ is a type of overload relay used in a motor start.

a. Melting allow
b. Bimetallic
c. Magnetic
d. All of these - correct answer. All of these

A melting allow overload in a magnetic motor starter ____.
Select one:
a. actuates when excessive motor circuit current is present and opens only the affected
motor circuit power contacts on the starter
b. must be replaced after it operates
c. can be reset immediately after it operates
d. actuates when excessive motor circuit current is present and opens the control circuit
to de-energize the coil
e. actuates when excessive control circuit current is present and opens the control
circuit to de-energize the coil - correct answer. actuates when excessive motor circuit
current is present and opens the control circuit to de-energize the coil

A 240-volt, 3Φ motor would require a starter with a minimum of ___ power pole(s) to
open the circuit.

Select one:
a. 3
b. 1
c. 2 - correct answer. 3

Refer to Figure 321.13 Symbol S is a ___.

Select one:
a. circuit interrupter (or breaker)
b. disconnect (or safety switch)
c. circuit breaker with thermal OLs




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d. circuit breaker with magnetic OLs
e. circuit breaker with thermal and magnetic OLs - correct answer. disconnect (or
safety switch)

Inherent motor protection devices are built into the motor and are reset ___.

Select one:
a. manually
b. automatically - correct answer. automatically

Inherent motor protection devices are built into the ___ and are reset automatically.

Select one:
a. motor
b. starter - correct answer. motor

When light strings are utilized on a construction site, empty sockets or sockets with
shattered lamps should be replaced ___ after being reported.

Select one:
a. before the next work shift
b. immediately
c. within 72 hours
d. within 24 hours - correct answer. immediately

The OSHA regulations set the minimum lighting level for different areas on
constructions sites. These levels are dependant upon the task being performed in the
area. For example, ___ foot candles are required in an area used for offices than the
number that would be required for storage.

Select one:
a. more
b. less - correct answer. more

Where construction work is in progress, OSHA requires areas, aisles, stairs , ramps,
runways, corridors, offices, shops, and storage areas to be lighted.

Select one:
a. True
b. False - correct answer. True

Free-standing temporary light stands ___ permitted to be used on construction sites.

Select one:
a. are not
b. are - correct answer. are




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Temporary electric splices are to be insulted and inaccessible. When these splices are
more than ___ feet above the floor, they are considered to be inaccessible.

Select one:
a. 16
b. 8
c. 12
d. 10
e. 6 1/2 - correct answer. 8

During the period of construction, ___ foot candles are required in electrical equipment
rooms.

Select one:
a. 3
b. 30
c. 5
d. 10
e. 12 - correct answer. 10

To provide convenience receptacles and lighting for temporary construction sites, a
minimum of __ circuits are required.

Select one:
a. two
b. one
c. three
d. five - correct answer. two

A dual-voltage motor could be a __ motor.

Select one:
a. 120- or 240-volt, 1Φ
b. 240- or 480-volt, 1Φ
c. 240- or 480-volt, 3Φ
d. any of these - correct answer. any of these

When a dual-voltage motor is connected to a high-voltage circuit, the __ current is less
than it would be if connected to a low voltage circuit.

Select one:
a. line
b. winding
c. both a & b - correct answer. line




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