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WorksheetsOutcome 4 Safe working procedures during fault finding.
Total questions: 20
Worksheet time: 10mins
Under the EAW Regulations what must a person be before carrying out fault finding?
Fully time served.
Approved Electrician.
Electrician.
Competent.
What should be produced before carrying out fault finding to ensure a safe system of work?
A plan.
A wiring diagram.
Risk assessment, method statement and permit to work.
Circuit chart.
What must test leads and probe of test equipment comply with before carrying out fault finding?
BS 7671 Regulations.
GN GS38.
On site guide BS7671.
GN 3
What type of test instrument would be used to measure voltage when fault finding?
Approved voltage indicator.
Clamp on amp meter.
Low resistance ohm meter.
Insulation resistance tester.
What type of test instrument would be used to measure current when fault finding?
Approved voltage indicator.
Clamp on amp meter.
Low resistance ohm meter.
Insulation resistance tester.
What type of test instrument would be used to measure insulation resistance when fault finding?
Approved voltage indicator.
Clamp on amp meter.
Low resistance ohmmeter.
Insulation resistance tester.
What type of test instrument would be used to check the phase sequence in a 3 phase circuit when fault finding?
Approved voltage indicator.
Low resistance ohmmeter
Phase sequence tester
Clamp on amp meter.
What type of test instrument would be used to measure EFLI when fault finding?
RCD tester.
PFC tester.
Low resistance ohmmeter.
Earth fault loop impedance tester.
What type of test instrument would be used to check PFC when fault finding?
Approved voltage indicator.
Clamp on amp meter.
Prospective fault current tester.
RCD tester.
What type of test instrument would be used to check the disconnection times of a RCBO when fault finding?
RCD tester.
Voltage indicator.
Insulation resistance tester.
EFLI tester.
What type of test instrument would be used check for incorrect phase rotation in a 3 phase circuit when fault finding?
Approved voltage indicator.
Rotating disc type instrument.
RCD tester.
PFC tester.
What type of test instrument would be used to find a short circuit or earth fault on a cable when fault finding?
Low resistance ohmmeter.
PFC tester
Insulation resistance tester.
RCD tester.
What type of test instrument would be used to find a open circuit in a cable installation when fault finding?
Approved voltage indicator.
EFLI tester.
PFC Tester
Low resistance ohmmeter.
What type of test instrument would be used to find a overload in a circuit when fault finding?
Approved voltage indicator.
Clamp on amp meter.
Insulation resistance tester.
Low resistance ohmmeter.
What type of test instrument would be used to find incorrect polarity at a E.S. lamp holder when fault finding?
Low resistance ohmmeter.
Insulation resistance tester.
RCD tester.
PFC tester.
What type of test instrument would be used to check the measure Zs in a circuit complies with the maximum Zs to ensure A.D.O.S. when fault finding?
RCD tester.
EFLI tester.
Insulation resistance tester.
Low resistance ohmmeter.
A ready of 0.00 megohms is obtained between Line and CPC on a lighting circuit. This would indicate what type of fault?
An overload.
Incorrect polarity.
Open circuit.
Dead short (earth fault)
A reading of greater than 100 ohms is obtained when carrying out a R1+R2 test on a lighting circuit. What type of fault would this indicate?
Open circuit (High resistance joint)
Short circuit
Earth fault
Faulty RCD
A reading of greater than 300ms is obtained when carrying out a RCD test at x1 on a circuit. What type of fault would this indicate?
Faulty switch
Faulty cable
Faulty RCD
Faulty MCB
What is the most likely reason for arcing in a light switch?
Voltage drop
Open circuit
Short circuit
Loose connection.
