Exam (elaborations)
Year 3 IEC FINAL Review 2024
Year 3 IEC FINAL Review 2024
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Year 3 IEC FINAL Review___ is a type of overload relay used in a motor start.
a. Melting allow
b. Bimetallic
✅✅-All of these
c. Magnetic
d. 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 - -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 - -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
✅✅-disconnect (or safety
d. circuit breaker with magnetic OLs
e. circuit breaker with thermal and magnetic OLs -
switch)
Inherent motor protection devices are built into the motor and are reset ___.
Select one:
✅✅-automatically
a. manually
b. automatically -
,Inherent motor protection devices are built into the ___ and are reset automatically.
Select one:
✅✅-motor
a. motor
b. starter -
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 - -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:
✅✅-more
a. more
b. less -
Where construction work is in progress, OSHA requires areas, aisles, stairs , ramps,
runways, corridors, offices, shops, and storage areas to be lighted.
Select one:
✅✅-True
a. True
b. False -
Free-standing temporary light stands ___ permitted to be used on construction sites.
Select one:
✅✅
a. are not
b. are - -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
✅✅-8
d. 10
e. 6 1/2 -
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 - -10
To provide convenience receptacles and lighting for temporary construction sites, a
minimum of __ circuits are required.
Select one:
a. two
b. one
✅✅-two
c. three
d. five -
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 - -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
✅✅-line
b. winding
c. both a & b -
A dual-voltage motor was connected to a low-voltage circuit. Later, the circuit was
replaced with a high-voltage circuit. After the motor was reconnected to the circuit,
the line current ___.
Select one:
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