1 Who, under the Electricity at Work Regulations, should the inspector ensure the safety of?

• A. Themselves.

• B. The client and others.

• C. Both themselves and others.

• D. Staff in other buildings owned by the client.

Where is the correct location to test that a lighting circuit is isolated and safe to work on?

• A. At the supply intake position.

• B. On the supply side of the circuit protective device.

• C. At any convenient luminaire.

• D. On the load side of the circuit protective device.

How many keys must be available for a lock that is used to securely isolate a protective device?

• A. 1.

• B. 2.

• C. 3.

• D. 4.

Why is safe isolation carried out?

• A. To allow earth fault loop impedance testing.

• B. To allow phase sequencing testing.

• C. To stop RCDs operating when testing.

• D. To stop contact with live parts.

Testing is to be carried out at the origin of a large, unoccupied building which has a standby generator. What must be done before tests are carried out?

• A. Check the operation of the standby supply.

• B. All main protective bonding must be disconnected.

• C. Temporary lighting must be installed for all escape routes.

• D. The standby supplies must be isolated to ensure safe testing.

The implications of not carrying out a safe isolation could lead to prosecution. Which statutory legislation would be used for this purpose?

• A. COSHH.

• B. ESCQR.

• C. EAWR.

• D. BS 7671.

Which document is statutory?

• A. BS 7671.

• B. EAWR.

• C. GN3.

• D. GS38

Which publication does not include model forms that can be used for certification and reporting purposes?

• A. HSE Guidance Note GS38.

• B. The IET On-Site Guide.

• C. IET Guidance Note 3.

• D. BS 7671.

Which test would not apply to an electrical installation forming part of a TN-S system?

• A. Earth fault loop impedance.

• B. Insulation resistance.

• C. Earth electrode resistance.

• D. Functional tests.

Which test could also indicate the supply polarity?

• A. External earth fault loop impedance.

• B. Continuity of protective conductors.

• C. Insulation resistance.

• D. Continuity of ring final circuits.