2391-50 Inspection and Testing

1 What is the main purpose of an Initial Verification?

• A. To complete the testing and issue an Electrical Installation Certificate.

• B. To make a judgement that the installation is safe for continued use.

• C. To confirm an installation is safe to be put into service.

• D. To ensure all testing has been carried out.

2 What situation requires the issuing of a Minor Electrical Installation Works Certificate?

• A. An additional lighting circuit has been installed.

• B. Changing a consumer unit and protective devices.

• C. Upgrading the cable and circuit breaker for a shower circuit.

• D. Additional socket-outlets added to an existing ring final circuit.

3 Which statutory document contains specific information relevant to Initial Verification?

• A. The Electricity at Work Regulations.

• B. Health and Safety guidance GS38.

• C. The Health and Safety at Work Act.

• D. BS 7671, Requirements for Electrical Installations.

4 What is the minimum voltage which requires the test leads and probes to comply with GS38?

• A. 25 V AC.

• B. 50 V AC.

• C. 120 V AC.

• D. 150 V AC.

5 How many voltage measurements are required to confirm that a three-phase four-wire installation is safely isolated?

• A. 3

• B. 6

• C. 9

• D. 10

6 What precaution is required before carrying out a test of external earth fault loop impedance (Ze) so as to avoid danger to users of an installation?

• A. Lock off the supply.

• B. Use insulated screwdrivers.

• C. Warn the occupier of the premises.

• D. Disconnect the main protective bonding conductors.

7 Why does BS 7671 require inspection to be carried out before testing?

• A. To confirm the installers have installed as per the job specification.

• B. To confirm all the equipment is connected to the installation will work.

• C. To confirm the installation is complete and it is safe to commence testing.

• D. To confirm the Earthing Conductor is connected and it is safe to commence testing.

8 Which situation will not require a label stating ‘Safety Electrical Connection – Do Not remove’?

• A. Connecting a bonding conductor to a metallic installation gas pipe.

• B. An Earthing conductor connected to an installation earth electrode.

• C. A supplementary bonding conductor connected to a metallic water pipe.

• D. The connection to a Main Earthing Terminal within a consumer unit.

9 What must be checked when inspecting a consumer unit for compliance with Basic Protection requirements?

• A. All cable terminations are tight.

• B. Enclosures meet the IP requirements.

• C. Live conductors are correctly identified.

• D. Protective devices are the correct rating.

10 Which two senses are used when inspecting the terminations at a newly installed motor?

• A. Sight and hearing.

• B. Sight and smell.

• C. Touch and smell.

• D. Touch and sight.