EWRB Theory Exam Prep LATEST 2024 UPDATE Questions and 100% Correct Answers
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Course
EWRB
Institution
EWRB
EWRB Theory Exam Prep LATEST 2024 UPDATE Questions and 100% Correct Answers
What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - ANSWER 1MΩ
When carrying out testing on a low voltage electrical installation, whi...
, What is the minimum value of the permitted test result for the insulation resistance test
of a three-phase, 400V, mains cable? - ANSWER 1MΩ
When carrying out testing on a low voltage electrical installation, which document
details the tests and checks required to be carried out? - ANSWER AS/NZS 3000
What is the minimum or maximum test result value you would consider acceptable for
A
an Earth Continuity test? - ANSWER 1Ω or less
VI
State TWO types of electrical protection provided by a RCBO. - ANSWER ANY
TWO:
- Earth Leakage
TU
- Overload
- Short Circuit
If the voltage and current are known, what TWO other factors are required to calculate
IS
the power consumed by a three-phase motor? - ANSWER √3 & Power Factor
What type of single-phase motor can be reversed by reversing the connections to the
run winding? - ANSWER ANY ONE:
M
- Split-Phase Motor
- Capacitor Start Motor
O
- Cap-Start, Cap-Run Motor
What type of single-phase motor can be reversed by reversing the connections to the
A
armature brushes? - ANSWER ANY ONE:
- Universal Motor
N
- Series Motor
JP
State ONE reason why the metal frame of a Class 1 electrical appliance is earthed. -
ANSWER ANY ONE:
- To ensure the operation of a protective device under fault conditions.
- To keep the frame of the appliance at earth potential under fault conditions.
State TWO factors that determine the severity of electric shock upon the human body. -
ANSWER ANY TWO:
- Voltage Applied
- Shock Current Level
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