Electrical Testing Quiz

What is the primary purpose of insulation resistance testing?

• To measure the current flow

• To ensure the integrity of insulation

• To check the voltage level

• To test the circuit continuity

Which instrument is commonly used for earth resistance testing?

• Megger

• Multimeter

• Oscilloscope

• Clamp meter

What does a high reading on a continuity test indicate?

• Good connection

• Poor connection

• Open circuit

• Short circuit

In a three-phase system, what is the typical voltage between any two phases?

• 120V

• 230V

• 400V

• 600V

What is the main function of a Residual Current Device (RCD)?

• To protect against overcurrent

• To protect against earth faults

• To measure voltage

• To measure current

What is the purpose of a polarity test in electrical installations?

• To check the insulation resistance

• To ensure correct connection of live conductors

• To measure earth resistance

• To test the circuit breaker

Which of the following is a common method for testing circuit continuity?

• Using a megger

• Using a multimeter

• Using an oscilloscope

• Using a clamp meter

What does a low insulation resistance reading indicate?

• Good insulation

• Poor insulation

• High voltage

• Low current

What is the standard test voltage for insulation resistance testing of low voltage installations?

• 250V

• 500V

• 1000V

• 2000V

Which test is used to verify the effectiveness of protective conductors?

• Continuity test

• Insulation resistance test

• Earth fault loop impedance test

• Polarity test