What are the first three tests undertaken on a newly installed radial circuit?

Continuity of CPC, Continuity of Ring, Insulation Resistance.

Continuity of Ring, Insulation Resistance, Polarity.

Continuity of CPC, Insulation Resistance, Polarity.

Continuity of Ring, Polarity, Earth Electrode Resistance.

How would an insulation resistance tester be checked for function?

Confirming the instrument on a known supply.

Test with leads open then closed together.

Test whilst holding the probe tips between fingers.

Confirming the instrument’s calibration date.

What procedure would need to be carried out, if test instruments were found to be very inaccurate, following accuracy checks?

Installations tested since the last calibration would need re-testing.

Installations tested since the last calibration must be shut-down.

The HSE must be informed immediately using a RIDDOR form.

The local authority must be informed so they can issue notices.

What must be carried out if a test of insulation resistance produced a non-compliant result during the initial verification of a circuit?

The fault must be repaired and live testing would be carried out.

Testing would continue and the fault must be repaired after all tests.

The fault must be repaired and start all testing from the beginning.

The tests would continue and the problem is reported on the Certificate.

How are the continuity of Main Protective Bonding conductors verified when they are visible throughout their length?

By visual inspection and checking tightness of connections.

By testing their insulation resistance to a known earth.

By testing earth fault loop impedance with them disconnected.

By testing their voltage whilst introducing an earth fault.

What is verified when a result of R1+R2 is successfully recorded?

That the circuit line and neutral is continuous in the circuit.

That the line and CPC is continuous in the supply.

That the neutral and CPC is continuous in the supply.

That the line and CPC is continuous in the circuit.

Why is it necessary to test ring-final circuit continuity to establish that any unfused spurs are limited to one socket-outlet?

As the cable used for the spur is not suitably sized for overcurrent.

As the cable used for the spur is not suitably sized for undervoltages.

As the cables wired in the ring will become un-balanced.

As the cables wired in the ring will increase in resistance.

Why is it essential for a Main Protective Bonding Conductor, connected to a gas installation pipe, to have a low resistance?

To provide a path to earth if the gas pipe develops a leak.

To ensure the circuit disconnects in the time specified by BS 7671.

To ensure voltage appears on the gas pipe during an earth fault.

To ensure the circuit has a continuous line conductor.

What is a possible reason for a low insulation resistance when testing a car park lighting circuit?

A switch is in the off position.

What test instrument can be used to confirm supply polarity is correct?

Earth fault loop impedance tester.

Earth electrode resistance tester.

What is an alternative method to direct measurement, for obtaining the Prospective Fault Current for an installation?

Recording the breaking capacity of the Distribution Network Operator (DNO) fuse.

Enquiry to the Distribution Network Operator.

Multiplying the maximum Zs by 2.

Using the maximum demand value.

What instrument is used to verify phase-sequence?

A three-lead rotating disc instrument.

A three-lead single-phase approved voltmeter.

A two-lead continuity test set.

What functional test is carried out on an RCD?

Confirmation of the test button operation.

Confirmation that the RCD is 30 mA.

Confirmation that the RCD is Type A.

Confirmation of the fly lead connection.

What must a client be made aware of following the verification of an installation having a range of RCBOs?

The need to operate the test button on a regular basis.

The need to test the RCBOs yearly with a test instrument.

The need to power off the installation to allow the RCBOs to cool once a year.

The need to have RCBOs replaced if they trip more than once.

Which document from BS 7671 can only be used to verify an addition or alteration to an existing circuit only?

Minor Electrical Installation Works Certificate.

Electrical installation Condition Report.

Electrical Installation Certificate.

Unit 012 understand inspection, testing (Revision)

Authored by Paul Ward

Construction

Vocational training

Used 4+ times

Unit 012 understand inspection, testing (Revision)

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the Electricity at Work Regulations specifically require a person carrying out inspection and testing to be?

Competent.

Ordinary.

Responsible.

Instructed.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How must an isolated circuit be secured?

Using a warning notice.

With a lock having one key.

With a lock having many keys.

Using tape over the circuit breaker.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a proving unit do?

It checks that a circuit is safe to work on.

It checks that a circuit breaker is secured.

It simulates a supply to test the isolated circuit.

It simulates a supply to test the Voltage indicator.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which test cannot be safely undertaken on a circuit that is not securely isolated?

Phase sequencing.

Insulation resistance.

Prospective fault current.

Earth fault loop impedance.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What must an inspector consider, for safety reasons, before isolating a supply?

Mobile phones are fully charged.

Lifts are not operating or occupied.

Emergency lights are fully discharged.

Fire alarms batteries are disconnected.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What should never be undertaken unless a building is fully isolated?

Remove the cover from a socket-outlet.

Undertake earth fault loop impedance testing

Disconnect main protective bonding conductors.

Check the phase sequence of the supply.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which IET Guidance Note is specific to the Initial Verification process?

GN1

GN3

GN6

GN8

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Unit 012 understand inspection, testing (Revision)

What does the Electricity at Work Regulations specifically require a person carrying out inspection and testing to be?

How must an isolated circuit be secured?

What does a proving unit do?

Which test cannot be safely undertaken on a circuit that is not securely isolated?

What must an inspector consider, for safety reasons, before isolating a supply?

What should never be undertaken unless a building is fully isolated?

Which IET Guidance Note is specific to the Initial Verification process?

Which of the following documents is statutory?

What are the first three tests undertaken on a newly installed radial circuit?

What test is undertaken at the origin of an installation?

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