MASTER ELECTRICIAN EXAMINATION
QUESTIONS AND ANSWERS
#1 Refer to the Level Power plan by clicking on the EXHIBIT button above
Based on the information shown of this exhibit, the current in the branch circuit for the
HP-5 indoor unit is _________amperes
A.0
B. 7.2
C. 52.0
D. 72.1 - Correct Answers -D. 72.1
The ground fault circuit protection for personnel works on the principle of measuring
unbalanced current between
A. UNDERGROUND CONDUCTORS
B. THE SERVICE DISCONNECT AND BRANCH CIRCUIT
C. THE GROUNDED AND UNGROUNDED CONDUCTORS
D. THE GROUNDING AND UNGROUNDED CONDUCTORS - Correct Answers -D.
THE GROUNDING AND UNGROUNDED CONDUCTORS
A device of group of devices that serve to govern in some predetermined manner the
electric power delivered to the apparatus to which it is connected is a
A. DEVICE
B. CONTROLLER
C. DISCONNECT
D. CIRCUIT BREAKER - Correct Answers -B. CONTROLLER
#2 Refer to the Level Power plan by clicking on the EXHIBIT button above
For the circuit that serves the outside HP-5 motor compressor conditioning unit, the
maximum rating of the inverse time breaker permitted to provide short-circuit is
___amperes
A. 40
B. 45
C. 60
D. 70 - Correct Answers -C. 60
,Give: Two separate services are identical in voltage and amperage, except that one
service serves on motor loads and the other serves lighting loads only.
In the event of a short circuit in these services, the available short-circuit current will be
A. THE SAME IN EITHER SERVICE
B. 25 PERCENT GREATER IN THE SERVICE FOR THE MOTOR LOAD
C. HIGHER IN THE LIGHTING-LOAD SERVICE BECAUSE OF CONTINUOUS LOADS
D. HIGHER IN THE MOTOR-LOAD SERVICE BECAUSE OF THE INDUCTIVE
REACTANCE FROM THE MOTORS. - Correct Answers -B. 25 PERCENT GREATER
IN THE SERVICE FOR THE MOTOR LOAD
#3 Refer to the Electrical Feeder Diagram by clicking on the EXHIBIT button above
Given: The maximum load must not exceed 80 percent of the ampere rating of the main
breaker, and the maximum load must not exceed 80 percent of the ampacity of the
service entrance conductors. The service entrance conductors have XHHW insulation.
The voltage is 208
What is the maximum balanced electrical load permitted, in volt-amperes, for the new
service?
A. 57, 600
B. 99, 840
C. 172, 927
C. 178, 692 - Correct Answers -A. 57, 600
Given: A 3-phase system has a line current of 150 amperes and a line voltage of 208
volts. Determine the total volt-ampere load for the above.
A. 18, 000
B. 31, 200
C.54, 040
D. 93, 600 - Correct Answers -C.54, 040
Given: Acircuit supplying a resistive load has a total current reading of 27 amperes. The
resistance of a faulty connection is 0.21 ohms. The power by the faulty connection is
____ watts.
A. 0.2
B. 5.7
C. 54
D. 153 - Correct Answers -B. 5.7
In a step-down voltage transformer, the current in the secondary is approximately equal
to the:
A. INDUCED CURRENT
B. VOLT-AMPERE LOAD
C. NUMBER OF TURNS ON THE WINDING
, D. PRIMARY AND SECONDARY OVERCUTTENT PROTECTION - Correct Answers -
C. NUMBER OF TURNS ON THE WINDING
The approximate line current per phase on a balanced 3-phased system with a
maximum load per phase of 20, 000 VA and a line of 208 volts is _____ amperes.
A. 55
B. 96
C. 167
D. 288 - Correct Answers -B. 96
Which of the following statements is correct for flexible metal conduit? Flexible metal
conduit is
A. ALLOWED IN STORAGE BATTERY ROOOMS
B. NOT SUITABLE FOR USE IN WET LOCATIONS
C. APPROVED FOR EMBEDMENT IN CONCRETE
C. LIMITED TO 6FT WHEN FINISHED IN EXISTING CONSTRUCTION. - Correct
Answers -B. NOT SUITABLE FOR USE IN WET LOCATIONS
The maximum permitted length of flexible metal conduit permitted between a raceway
and service equipment is ____ft.
A. 3
B. 4
C. 5
D. 6 - Correct Answers -D. 6
The NEC permits 3/8 in. flexible metal conduit to be unsupported for tap connections to
light fixtures, provided the maximum length is ______ft.
A. 3
B. 6
C. 9
D. 12 - Correct Answers -B. 6
A metallic electrical panel that is in an indoor wet location is required to be set out from
the wall a minimum of _____in.
A. 1/32
B. 1/16
C. 1/8
D. 1/4 - Correct Answers -D. 1/4
Rigid polyvinyl chloride conduit, 1 inch in size, must be supported at maximum intervals
of _____ft.
A. 3
B. 5
C. 6
D. 10 - Correct Answers -A. 3
QUESTIONS AND ANSWERS
#1 Refer to the Level Power plan by clicking on the EXHIBIT button above
Based on the information shown of this exhibit, the current in the branch circuit for the
HP-5 indoor unit is _________amperes
A.0
B. 7.2
C. 52.0
D. 72.1 - Correct Answers -D. 72.1
The ground fault circuit protection for personnel works on the principle of measuring
unbalanced current between
A. UNDERGROUND CONDUCTORS
B. THE SERVICE DISCONNECT AND BRANCH CIRCUIT
C. THE GROUNDED AND UNGROUNDED CONDUCTORS
D. THE GROUNDING AND UNGROUNDED CONDUCTORS - Correct Answers -D.
THE GROUNDING AND UNGROUNDED CONDUCTORS
A device of group of devices that serve to govern in some predetermined manner the
electric power delivered to the apparatus to which it is connected is a
A. DEVICE
B. CONTROLLER
C. DISCONNECT
D. CIRCUIT BREAKER - Correct Answers -B. CONTROLLER
#2 Refer to the Level Power plan by clicking on the EXHIBIT button above
For the circuit that serves the outside HP-5 motor compressor conditioning unit, the
maximum rating of the inverse time breaker permitted to provide short-circuit is
___amperes
A. 40
B. 45
C. 60
D. 70 - Correct Answers -C. 60
,Give: Two separate services are identical in voltage and amperage, except that one
service serves on motor loads and the other serves lighting loads only.
In the event of a short circuit in these services, the available short-circuit current will be
A. THE SAME IN EITHER SERVICE
B. 25 PERCENT GREATER IN THE SERVICE FOR THE MOTOR LOAD
C. HIGHER IN THE LIGHTING-LOAD SERVICE BECAUSE OF CONTINUOUS LOADS
D. HIGHER IN THE MOTOR-LOAD SERVICE BECAUSE OF THE INDUCTIVE
REACTANCE FROM THE MOTORS. - Correct Answers -B. 25 PERCENT GREATER
IN THE SERVICE FOR THE MOTOR LOAD
#3 Refer to the Electrical Feeder Diagram by clicking on the EXHIBIT button above
Given: The maximum load must not exceed 80 percent of the ampere rating of the main
breaker, and the maximum load must not exceed 80 percent of the ampacity of the
service entrance conductors. The service entrance conductors have XHHW insulation.
The voltage is 208
What is the maximum balanced electrical load permitted, in volt-amperes, for the new
service?
A. 57, 600
B. 99, 840
C. 172, 927
C. 178, 692 - Correct Answers -A. 57, 600
Given: A 3-phase system has a line current of 150 amperes and a line voltage of 208
volts. Determine the total volt-ampere load for the above.
A. 18, 000
B. 31, 200
C.54, 040
D. 93, 600 - Correct Answers -C.54, 040
Given: Acircuit supplying a resistive load has a total current reading of 27 amperes. The
resistance of a faulty connection is 0.21 ohms. The power by the faulty connection is
____ watts.
A. 0.2
B. 5.7
C. 54
D. 153 - Correct Answers -B. 5.7
In a step-down voltage transformer, the current in the secondary is approximately equal
to the:
A. INDUCED CURRENT
B. VOLT-AMPERE LOAD
C. NUMBER OF TURNS ON THE WINDING
, D. PRIMARY AND SECONDARY OVERCUTTENT PROTECTION - Correct Answers -
C. NUMBER OF TURNS ON THE WINDING
The approximate line current per phase on a balanced 3-phased system with a
maximum load per phase of 20, 000 VA and a line of 208 volts is _____ amperes.
A. 55
B. 96
C. 167
D. 288 - Correct Answers -B. 96
Which of the following statements is correct for flexible metal conduit? Flexible metal
conduit is
A. ALLOWED IN STORAGE BATTERY ROOOMS
B. NOT SUITABLE FOR USE IN WET LOCATIONS
C. APPROVED FOR EMBEDMENT IN CONCRETE
C. LIMITED TO 6FT WHEN FINISHED IN EXISTING CONSTRUCTION. - Correct
Answers -B. NOT SUITABLE FOR USE IN WET LOCATIONS
The maximum permitted length of flexible metal conduit permitted between a raceway
and service equipment is ____ft.
A. 3
B. 4
C. 5
D. 6 - Correct Answers -D. 6
The NEC permits 3/8 in. flexible metal conduit to be unsupported for tap connections to
light fixtures, provided the maximum length is ______ft.
A. 3
B. 6
C. 9
D. 12 - Correct Answers -B. 6
A metallic electrical panel that is in an indoor wet location is required to be set out from
the wall a minimum of _____in.
A. 1/32
B. 1/16
C. 1/8
D. 1/4 - Correct Answers -D. 1/4
Rigid polyvinyl chloride conduit, 1 inch in size, must be supported at maximum intervals
of _____ft.
A. 3
B. 5
C. 6
D. 10 - Correct Answers -A. 3
