IEC YEAR 3 FINAL EXAM REVIEW QUESTIONS AND COMPLETE ANSWERS 2024/2025
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IEC
Institution
IEC
___ 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 ...
IEC YEAR 3 FINAL EXAM REVIEW QUESTIONS AND
COMPLETE ANSWERS 2024/2025
___ 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
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
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.
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