608/014 Mock Exam 2

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

• G.N. 3
• BS 7671
• GS38
• BS 3036

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

• An Electrical Installation Certificate
• A Condition Report
• An Electrical Installation Condition Report
• 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?

• Manufacturers of the test instruments
• Specialist equipment manufacturers
• The HSE
• The clients or their representatives

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?

• Open circuit at the origin of the circuit
• Short circuit at the origin of the circuit
• Open circuit at the final socket-outlet
• Short circuit at the final socket-outlet

What is the most likely reason for a 15 A re-wireable fuse, protecting a radial socket outlet circuit that is reported to 'blow' every so often.

• Transient overvoltage
• Open circuit in the line
• Occasional overloading
• Poor metering at the intake

What precautions would an inspector need to consider when undertaking fault diagnosis work to stairway lighting, in an occupied multi-storey building that has back up supplies?

• Ensure that the emergency lights are functioning correctly
• Ensure the risk assessments are completed and followed
• Ensure the standby generators are connected to the DNO supply
• Ensure that all access equipment is non-metallic and tagged as 'safe'.

What is the correct unit that would be displayed on an RCD tester when confirming compliance with additional protection?

• mA
• In
• ms
• mΩ

What is the MOST appropriate method of finding the location of an open circuit in the c.p.c. of a radial socket-outlet circuit supplying a number of outlets?

• Using a prospective earth fault test at the end of the circuit
• Using an earth fault loop impedance tester at the origin
• Using a continuity tester at the mid-point of a circuit
• Using an insulation resistance tester on the supply to the circuit

What type of circuit would have a minimum acceptable insulation resistance value of 0.5 MΩ between live conductors?

• PELV
• FELV
• Reduced-Low voltage
• Low voltage

What would be the approximate voltage drop in a 35 m long radial circuit that has a combined live conductor resistance of 0.54Ω at 20◦C, and a load current of 16 A?

• 35.54 V
• 18.91 V
• 10.36 V
• 4.64 V