Fault finding Mock exam!

What is the most appropriate method to protect against electric shock when carrying out fault diagnosis work?

• A. Comply with COSHH.

• B. Comply with the WEEE regulations.

• C. Comply with the EaWR 1989.

• D. Comply with ESQCR 2002.

Why would a method statement be used by an experienced operative before undertaking work on an installation to diagnose a fault?

• A. To reduce the cost implications of the work to be undertaken.

• B. Ensure effective billing of the work procedure or process.

• C. Ensure Health and Safety requirements are considered.

• D. To monitor customer satisfaction for trade reviews.

Which standard must test leads comply with in order to help avoid electric shock when undertaking fault finding and diagnosis work?

• A. GN3

• B. BS 7671

• C. GS38

• D. BS 3036

Which document should be completed when replacing an existing faulty fan isolator switch?

• A. An Electrical Installation Certificate.

• B. A Condition Report Inspection Schedule.

• C. An Electrical Installation Condition Report.

• D. A Minor Electrical Installation Works Certificate

Who would an operative need to keep informed of serious faults found on the lighting circuits in a fully functioning commercial unit?

• A. Manufacturers of the test instruments.

• B. Specialist equipment manufacturers.

• C. The Health and Safety Executive.

• D. The clients or their representative.

A client has reported that a number of space heaters have stopped working following extensive use during a cold spell. Which of the following items would be the most likely to be checked during testing for fault diagnosis purposes?

• A. Prospective short circuit current.

• B. External earth fault loop impedance.

• C. Phase sequencing and insulation resistance.

• D. Circuit supply voltage and protective device status.

What is the most likely outcome following a small leakage between neutral and earth due to water ingress in the connections of a luminaire?

• A. High earth fault currents causing the main DNO fuse to operate.

• B. Phase sequencing becoming reversed causing machinery faults.

• C. High short circuit currents causing circuit fuses to operate.

• D. Residual current flow to earth causing the operation of an RCD.

What is the most likely reason for the sound of arcing within a contactor, controlling heaters, each time the load is on and running?

• A. A loose connection.

• B. A transient overvoltage.

• C. A low resistance joint.

• D. A dead short in the circuit.

Where is a short circuit in a cable most likely to be located?

• A. Where the containment has mechanical damage.

• B. An over tightened termination in an accessory.

• C. At the joint on the top of the circuit breaker.

• D. Where ambient temperature decreases

What fault would an experienced operative suspect if the final socket-outlet on a radial circuit was not operating but the rest of the outlets on the circuit were?

• A. Open circuit at the origin of the circuit.

• B. Short circuit at the origin of the circuit.

• C. Open circuit at the final socket-outlet on the circuit.

• D. Short circuit at the final socket-outlet on the circuit.