EWRB THEORY EXAM PREP STUDY GUIDE 100% PASS QUESTIONS WITH DETAILED ANSWERS | A+ GRADE ASSURED // LATEST
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Course
EWRB
Institution
EWRB
What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - ANS 1MΩ
When carrying out testing on a low voltage electrical installation, which document details the tests and checks required to be carried out? - ANS AS/NZS...
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PASS QUESTIONS WITH
DETAILED ANSWERS | A+
yc
GRADE ASSURED //
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LATEST
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, What is the minimum value of the permitted test result for the insulation resistance test of a
three-phase, 400V, mains cable? - ANS 1MΩ
When carrying out testing on a low voltage electrical installation, which document details the
tests and checks required to be carried out? - ANS AS/NZS 3000
What is the minimum or maximum test result value you would consider acceptable for an Earth
Continuity test? - ANS 1Ω or less
State TWO types of electrical protection provided by a RCBO. - ANS ANY TWO:
- Earth Leakage
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- Overload
- Short Circuit
If the voltage and current are known, what TWO other factors are required to calculate the
power consumed by a three-phase motor? - ANS √3 & Power Factor
winding? - ANS ANY ONE:
- Split-Phase Motor
- Capacitor Start Motor
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What type of single-phase motor can be reversed by reversing the connections to the run
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- Cap-Start, Cap-Run Motor
What type of single-phase motor can be reversed by reversing the connections to the armature
brushes? - ANS ANY ONE:
- Universal Motor
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- Series Motor
State ONE reason why the metal frame of a Class 1 electrical appliance is earthed. - ANS
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.
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State TWO factors that determine the severity of electric shock upon the human body. - ANS
ANY TWO:
- Voltage Applied
- Shock Current Level
- Contact Duration
- Skin Dryness
- Current Path
You have carried out a test on a low voltage final subcircuit in an electrical installation, the result
value was 20MΩ. What type of test has been carried out? - ANS Insulation Resistance Test
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