Master Electrician Exam – Questions With Proven
Solutions
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Terms in this set (102)
#1 Refer to the Level Power plan by D. 72.1
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
,The ground fault circuit protection for D. THE GROUNDING AND UNGROUNDED
personnel works on the principle of CONDUCTORS
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
A device of group of devices that B. CONTROLLER
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
#2 Refer to the Level Power plan by C. 60
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
,Give: Two separate services are B. 25 PERCENT GREATER IN THE SERVICE FOR THE
identical in voltage and amperage, MOTOR LOAD
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.
, #3 Refer to the Electrical Feeder A. 57, 600
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
Given: A 3-phase system has a line C.54, 040
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
Solutions
Add to calendar
Play your way to mastery with fun games
Match Blocks Charms NEW
Terms in this set (102)
#1 Refer to the Level Power plan by D. 72.1
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
,The ground fault circuit protection for D. THE GROUNDING AND UNGROUNDED
personnel works on the principle of CONDUCTORS
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
A device of group of devices that B. CONTROLLER
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
#2 Refer to the Level Power plan by C. 60
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
,Give: Two separate services are B. 25 PERCENT GREATER IN THE SERVICE FOR THE
identical in voltage and amperage, MOTOR LOAD
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.
, #3 Refer to the Electrical Feeder A. 57, 600
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
Given: A 3-phase system has a line C.54, 040
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
