EWRB Theory Exam Prep Questions with

EWRB Theory Exam Prep Questions with Complete Solutions (Latest 2025) What is the minimum value of the permitted test result for the insulation resistance test of a three-phase, 400V, mains cable? - Correct Answers ✅1MΩ When carrying out testing on a low voltage electrical installation, which document details the tests and checks required to be carried out? - Correct Answers ✅AS/NZS 3000 What is the minimum or maximum test result value you would consider acceptable for an Earth Continuity test? - Correct Answers ✅1Ω or less State TWO types of electrical protection provided by a

RCBO. - Correct Answers ✅ANY TWO:

• Earth Leakage
• 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? - Correct Answers ✅√3 & Power Factor 1 / 2

EWRB Theory Exam Prep Questions with Complete Solutions (Latest 2025) What type of single-phase motor can be reversed by reversing the connections to the run winding? - Correct

Answers ✅ANY ONE:

• Split-Phase Motor
• Capacitor Start Motor
• Cap-Start, Cap-Run Motor

What type of single-phase motor can be reversed by reversing the connections to the armature brushes? -

Correct Answers ✅ANY ONE:

• Universal Motor
• Series Motor

State ONE reason why the metal frame of a Class 1 electrical appliance is earthed. - Correct Answers

✅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. - Correct Answers ✅ANY

TWO:

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