DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DETAILED ANSWERS
OF Year 3 IEC DE...
FINAL EXAM QUESTIONS WITH ACTUAL DETAILED ANSWERS
OF Year 3 IEC
___ is a type of overload relay used in a motor start.
a. Melting allow
b. Bimetallic
c. Magnetic
d. All of these - 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 - 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 - 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 - ANSWER-disconnect (or safety switch)
Inherent motor protection devices are built into the motor and are reset ___.
Select one:
a. manually
b. automatically - ANSWER-automatically
Inherent motor protection devices are built into the ___ and are reset automatically.
Select one:
a. motor
b. starter - 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 - 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 - 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 - ANSWER-True
Free-standing temporary light stands ___ permitted to be used on construction sites.
Select one:
a. are not
b. are - 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 - 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 - 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 - 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
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