electrical

1. What is the purpose of an initial verification?

• A) To ensure that the installation complies with Part P of the building regulations

• B) To assess the general condition of the installation for continued service

• C) To confirm that the installation is safe and complies with BS 7671

• D) To identify the cause of a fault in the installation

2. Which test instrument is required to carry out an insulation resistance test?

• A) Earth fault loop impedance tester

• B) RCD tester

• C) Insulation resistance tester

• D) Continuity tester

3. What is the minimum insulation resistance value for an installation with a nominal voltage of up to 500V?

• A) 0.5 MΩ

• B) 1 MΩ

• C) 2 MΩ

• D) 5 MΩ

4. Which of the following tests should be carried out first during the inspection and testing process?

• A) Continuity of protective conductors

• B) Insulation resistance

• C) Polarity

• D) Earth fault loop impedance

5. What is the purpose of the Zs test?

• A) To measure the prospective short circuit current

• B) To verify that the polarity is correct
  

• C) To ensure that the circuit can safely disconnect in the event of a fault

• D) To check the integrity of bonding conductors

7. When testing an RCD, which test simulates a fault to check if the device operates correctly?

• A) Continuity test

• B) RCD test

• C) Insulation resistance test

• D) Loop impedance test

8. What is the primary reason for performing a continuity test on protective conductors?

• A) To ensure the live and neutral conductors are not cross-connected

• B) To confirm the earth fault loop impedance

• C) To verify the effectiveness of the earthing system

• D) To measure the insulation resistance

9. Which document should be completed following the inspection and testing of an electrical installation?

• A) Building compliance certificate

• B) Electrical Installation Certificate

• C) Electrical Safety Report

• D) Energy Performance Certificate

10. What should be done if a test result shows that the earth fault loop impedance is too high?

• A) Replace the main earthing conductor

• B) Investigate the earthing system and connections

• C) Increase the size of the circuit breaker

• D) Ignore it, as it is not critical

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

• A) To protect against overcurrent

• B) To detect earth faults and disconnect the circuit

• C) To measure insulation resistance

• D) To ensure correct polarity