Page 1 of 74
MASTER ELECTRICAL CLOSED BOOK 2026
EXAM COMPLETE (392) CURRENT TESTING
QUESTIONS AND DETAILED CORRECT
ANSWERS|GUARANTEED PASS.
ELECTRICAL
Ace your Master Electrical Closed Book Exam by mastering
advanced electrical theory, National Electrical Code (NEC)
standards, load calculations, and safety protocols. This study
guide evaluates your ability to solve complex electrical
problems and interpret code requirements without reference
materials through realistic, scenario-based practice questions.
It is specifically designed to ensure your success on the
licensing exam and advance your career as a master electrician.
A low value of reactive voltamperes in an AC circuit
compared with the wattage would indicate ______. ✓ ✓ ......
ANSWER ....... High power factor
It is generally recognized that _______ is the largest size EMT
hand bender. ✓ ✓ ...... ANSWER ....... 1 1/4
, Page 2 of 74
When the current flowing in a circuit exceeds the allowable
capacity of the conductor the part of the circuit that melts is
called a ______. ✓ ✓ ...... ANSWER ....... Fuse
The ratio of the power in kw to the total kva of an AC circuit is
known as the _____. ✓ ✓ ...... ANSWER ....... Power
factor
A 480/208/120V 3-phase transformer is connected delta-
wye. The secondary line voltage of the transformer is ______
in the secondary. ✓ ✓ ...... ANSWER ....... Greater than
the phase voltage
On a delta three-phase, 4-wire system, how many hot wires
may use a common neutral? ✓ ✓ ...... ANSWER ....... 2
The most common type of base used on standard
incandescent light bulbs of 300 watts or less is _______. ✓ ✓
...... ANSWER ....... Medium
A ______ of a switch is that part of a switch which is used for
the making or breaking of a connection and which is
, Page 3 of 74
electrically insulated from other contact making or breaking
parts. ✓ ✓ ...... ANSWER ....... Pole
An isolated ground receptacle shall be indentified by ______.
✓ ✓ ...... ANSWER ....... An orange triangle located on
the face of the receptacle
A conducting material that is ____ charged will have an
excess of electrons. ✓ ✓ ...... ANSWER ....... Negatively
When three single phase transformers are connected in
such a way that the line current is equal to the phase current
this transformer is ______ connected. ✓ ✓ ...... ANSWER
....... WYE
The difference between a neutral and a grounded circuit
conductor is ________. ✓ ✓ ...... ANSWER ....... Only a
neutral carries unbalanced current
A piece of electrical equipment that is designed to operate
at alternate intervals of ( 1) load and no load; or ( 2) load and
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rest; or ( 3 ) load, no load, and rest is called ____ duty. ✓ ✓
...... ANSWER ....... Intermittent
______ or _____ covers and plates shall be permitted with
nonmetallic boxes. ✓ ✓ ...... ANSWER .......
Nonmetallic or metal
An electrical outlet constructed so that moisture will not
enter the enclosure is classified as being _____. ✓ ✓ ......
ANSWER ....... Watertight
After cutting a conduit, to remove the rough edges on both
ends, the conduit ends should be ______. ✓ ✓ ......
ANSWER ....... Burnished
The instrument used to indicate phase relation between
current and voltage is the _______. ✓ ✓ ...... ANSWER .......
Power factor meter
Raactance will cause the current in a circuit to vary only
when _____. ✓ ✓ ...... ANSWER ....... AC current flows
MASTER ELECTRICAL CLOSED BOOK 2026
EXAM COMPLETE (392) CURRENT TESTING
QUESTIONS AND DETAILED CORRECT
ANSWERS|GUARANTEED PASS.
ELECTRICAL
Ace your Master Electrical Closed Book Exam by mastering
advanced electrical theory, National Electrical Code (NEC)
standards, load calculations, and safety protocols. This study
guide evaluates your ability to solve complex electrical
problems and interpret code requirements without reference
materials through realistic, scenario-based practice questions.
It is specifically designed to ensure your success on the
licensing exam and advance your career as a master electrician.
A low value of reactive voltamperes in an AC circuit
compared with the wattage would indicate ______. ✓ ✓ ......
ANSWER ....... High power factor
It is generally recognized that _______ is the largest size EMT
hand bender. ✓ ✓ ...... ANSWER ....... 1 1/4
, Page 2 of 74
When the current flowing in a circuit exceeds the allowable
capacity of the conductor the part of the circuit that melts is
called a ______. ✓ ✓ ...... ANSWER ....... Fuse
The ratio of the power in kw to the total kva of an AC circuit is
known as the _____. ✓ ✓ ...... ANSWER ....... Power
factor
A 480/208/120V 3-phase transformer is connected delta-
wye. The secondary line voltage of the transformer is ______
in the secondary. ✓ ✓ ...... ANSWER ....... Greater than
the phase voltage
On a delta three-phase, 4-wire system, how many hot wires
may use a common neutral? ✓ ✓ ...... ANSWER ....... 2
The most common type of base used on standard
incandescent light bulbs of 300 watts or less is _______. ✓ ✓
...... ANSWER ....... Medium
A ______ of a switch is that part of a switch which is used for
the making or breaking of a connection and which is
, Page 3 of 74
electrically insulated from other contact making or breaking
parts. ✓ ✓ ...... ANSWER ....... Pole
An isolated ground receptacle shall be indentified by ______.
✓ ✓ ...... ANSWER ....... An orange triangle located on
the face of the receptacle
A conducting material that is ____ charged will have an
excess of electrons. ✓ ✓ ...... ANSWER ....... Negatively
When three single phase transformers are connected in
such a way that the line current is equal to the phase current
this transformer is ______ connected. ✓ ✓ ...... ANSWER
....... WYE
The difference between a neutral and a grounded circuit
conductor is ________. ✓ ✓ ...... ANSWER ....... Only a
neutral carries unbalanced current
A piece of electrical equipment that is designed to operate
at alternate intervals of ( 1) load and no load; or ( 2) load and
, Page 4 of 74
rest; or ( 3 ) load, no load, and rest is called ____ duty. ✓ ✓
...... ANSWER ....... Intermittent
______ or _____ covers and plates shall be permitted with
nonmetallic boxes. ✓ ✓ ...... ANSWER .......
Nonmetallic or metal
An electrical outlet constructed so that moisture will not
enter the enclosure is classified as being _____. ✓ ✓ ......
ANSWER ....... Watertight
After cutting a conduit, to remove the rough edges on both
ends, the conduit ends should be ______. ✓ ✓ ......
ANSWER ....... Burnished
The instrument used to indicate phase relation between
current and voltage is the _______. ✓ ✓ ...... ANSWER .......
Power factor meter
Raactance will cause the current in a circuit to vary only
when _____. ✓ ✓ ...... ANSWER ....... AC current flows
