Master Electrician Exam Review (Latest
Update ) Questions & Answers
{Grade A} 100% Correct
At least_____ 125 V, single phase, 15 A or 20 A, duplex with ground-fault circuit
interrupter receptacle shall be provided in each elevator machine room and elevator
machinery space. - correct answer 1
Lighting systems covered by Article 411 shall have a power supply rated not more
than______and not more than 30V - correct answer 25A
Temporary electrical power and lighting installations shall be permitted for a period
not exceeding ____days for Christmas decorative lighting and similar purposes -
correct answer 90
,Lighting systems operating at 30V or less shall not be·installed within_______of pools,
spas, fountains, or similar locatipns - correct answer 10'
Where communications wires and cables and electric light or power conductors are
supported by the same pole and are run paralled to each other in span , the·supply
service drops of 0-750 volts running above and parallel to communications service
drops shall have a minimum separation of _______inches at any point in the
span, including the point of and at their attachment to the building, provided the
nongrounded conductors are insulated and that a clearance of not less than_______
inches is maintained between the two services at the pole - correct answer 12 /40
Communications Wires and cables shall have a vertical clearance of not less the
______feet from all points of
roofs above which they pass. - correct answer 8
,MV cable rated 35 KV cannot be installed in - correct answer Cable Tray
The grounding of communications wires should be run to the grounding electrode: -
correct answer in a straight line
Service Lateral conductors that supply power to limited loads of a single branch
circuit-such as a small polyphase power, controlled water heaters, and similar loads-
shall not be smaller than - correct answer 10 AWG Copper
Dry type transformers installed indoors rated over._______ shall be installed in a vault.
- correct answer 35KV
Flat:top underfloor raceways over 4 inches, but less 8 inches wide, with a minimum 1
inch spacing between raceways, shall be covered with concrete to a depth of not iess
, than 1 inch. Raceways spaced less that 1 inch apart shall be covered with a concrete to
a depth of - correct answer 1 1/2"
For straight pulls, the length of a pull box shall not be less than _____ time the outside
diameter, over the sheath, of the largest shielded ·or lead covered conductor or cable
entering the box on systems over 600 volts - correct answer 48 times
For switchboards that are not totally enclosed, a space of ____ or more shall be
provided between toe top of the switchboard and any combustible ceiling - correct
answer 36"
A disconnecting means that serves a hermetic refrigerant motor compressor shall
have an ampere rating of at least percent of the nameplate rated load current or
branch circuit selection current, whichever is greater. - correct answer 115%
Update ) Questions & Answers
{Grade A} 100% Correct
At least_____ 125 V, single phase, 15 A or 20 A, duplex with ground-fault circuit
interrupter receptacle shall be provided in each elevator machine room and elevator
machinery space. - correct answer 1
Lighting systems covered by Article 411 shall have a power supply rated not more
than______and not more than 30V - correct answer 25A
Temporary electrical power and lighting installations shall be permitted for a period
not exceeding ____days for Christmas decorative lighting and similar purposes -
correct answer 90
,Lighting systems operating at 30V or less shall not be·installed within_______of pools,
spas, fountains, or similar locatipns - correct answer 10'
Where communications wires and cables and electric light or power conductors are
supported by the same pole and are run paralled to each other in span , the·supply
service drops of 0-750 volts running above and parallel to communications service
drops shall have a minimum separation of _______inches at any point in the
span, including the point of and at their attachment to the building, provided the
nongrounded conductors are insulated and that a clearance of not less than_______
inches is maintained between the two services at the pole - correct answer 12 /40
Communications Wires and cables shall have a vertical clearance of not less the
______feet from all points of
roofs above which they pass. - correct answer 8
,MV cable rated 35 KV cannot be installed in - correct answer Cable Tray
The grounding of communications wires should be run to the grounding electrode: -
correct answer in a straight line
Service Lateral conductors that supply power to limited loads of a single branch
circuit-such as a small polyphase power, controlled water heaters, and similar loads-
shall not be smaller than - correct answer 10 AWG Copper
Dry type transformers installed indoors rated over._______ shall be installed in a vault.
- correct answer 35KV
Flat:top underfloor raceways over 4 inches, but less 8 inches wide, with a minimum 1
inch spacing between raceways, shall be covered with concrete to a depth of not iess
, than 1 inch. Raceways spaced less that 1 inch apart shall be covered with a concrete to
a depth of - correct answer 1 1/2"
For straight pulls, the length of a pull box shall not be less than _____ time the outside
diameter, over the sheath, of the largest shielded ·or lead covered conductor or cable
entering the box on systems over 600 volts - correct answer 48 times
For switchboards that are not totally enclosed, a space of ____ or more shall be
provided between toe top of the switchboard and any combustible ceiling - correct
answer 36"
A disconnecting means that serves a hermetic refrigerant motor compressor shall
have an ampere rating of at least percent of the nameplate rated load current or
branch circuit selection current, whichever is greater. - correct answer 115%
