Deck 4: Electrical Installations: Fault Diagnosis and Rectifi Cation

Question 1

The Electricity at Work Regulations tell us that 'we must ensure the disconnection and separation of electrical equipment from every source of supply and the separation must be secure'. A procedure to comply with this regulation is called:

A) working at height
B) a hazard risk assessment
C) a safe isolation procedure
D) a workstation risk assessment.

Answer 1

a safe isolation procedure

Question 2

'To ensure that the accessories and equipment within a building work as they were intended to work' is one definition of the purpose of:

A) testing electrical equipment
B) inspecting electrical systems
C) functional testing
D) polarity testing.

Answer 2

functional testing

Question 3

When making a test to determine the presence or absence of a voltage, the HSE recommends that for our own safety we should use:

A) any old tester bought at a car-boot sale
B) a multimeter set to the correct voltage
C) a proprietary test lamp
D) a voltage indicator.

Answer 3

a proprietary test lamp
a voltage indicator.

Question 4

For electrical test results to be valid the test instruments used:

A) must be new
B) must be of an approved type
C) must have a calibration certificate
D) must have a digital readout.

Question 5

A visual inspection of a new installation must be carried out:

A) during the erection period
B) during testing upon completion
C) after testing upon completion
D) before testing upon completion.

Question 6

'Good housekeeping' at work is about:

A) cleaning up and putting waste in the skip
B) working safely
C) making the tea and collecting everyone's lunch
D) putting tools and equipment away after use.

Question 7

Which hand tools would you use for terminating conductors in a junction box?

A) a pair of side cutters or knife
B) a screwdriver
C) a wood chisel and saw
D) a tenon saw.

Question 8

PAT testing is carried out on:

A) hand tools
B) domestic appliances only
C) work electrical tools
D) electrical equipment(e.g. 110 V transformers)

Question 9

When PAT testing a 110 V electric drill we are testing the:

A) efficiency of the drill
B) earth continuity of the drill
C) hammer action of the drill
D) insulation resistance of the drill.

Question 10

Under the Health and Safety at Work Act an employer is responsible for:

A) maintaining plant and equipment
B) providing PPE
C) wearing PPE
D) taking reasonable care to avoid injury

Question 11

Under the Health and Safety at Work Act an employee is responsible for:

A) maintaining plant and equipment
B) providing PPE
C) wearing PPE
D) taking reasonable care to avoid injury.

Question 12

The maximum inspection and re-test period for a domestic electrical installation is:

A) Three months
B) Three years
C) Five years
D) Ten years.

Question 13

Instrument calibration certificates are usually valid for a period of:

A) Three months
B) One year
C) Three years
D) Five years.

Question 14

The Electricity at Work Regulations absolutely forbid the following work activity:

A) working at height
B) testing live electrical systems
C) live repair work on electrical circuits
D) working without the appropriate PPE.

Question 15

Which hand tools would you use for removing cable insulation?

A) a pair of side cutters or knife
B) a screwdriver
C) a wood chisel and saw
D) a tenon saw.

Question 16

Which hand tools would you use to cut across a floorboard before lifting?

A) a pair of side cutters or knife
B) a screwdriver
C) a wood chisel and saw
D) a tenon saw.

Question 17

Which hand tools would you use to cut and remove a notch in a floor joist?

A) a pair of side cutters or knife
B) a screwdriver
C) a wood chisel and saw
D) a tenon saw.

Question 18

A tong test instrument can also correctly be called:

A) a continuity tester
B) a clip-on ammeter
C) an insulation resistance tester
D) a voltage indicator.

Question 19

All electrical test probes and leads must comply with the standards set by the:

A) BS EN 60898
B) BS 7671
C) HSE Guidance Note GS 38
D) IET Regulations Part 2.

Question 20

The test required by the IET Regulations to ascertain that the CPC is correctly connected is called:

A) a basic protection
B) continuity of ring final circuit conductors
C) continuity of protective conductors
D) earth electrode resistance.

Question 21

One objective of the polarity test is to verify that:

A) lamp holders are correctly earthed
B) final circuits are correctly fused
C) the CPC is continuous throughout the installation
D) the protective devices are connected in the live conductor.

Question 22

When testing a 230 V installation an insulation resistance tester must supply a voltage of:

A) less than 50 V
B) 500 V
C) less than 500 V
D) greater than twice the supply voltage but less than 1000 V.

Question 23

The value of a satisfactory insulation resistance test on each final circuit of a 230 V installation must be:

A) less than 1 ?
B) less than 0.5 M?
C) not less than 0.5 M?
D) not less than 1 M?.

Question 24

Before beginning work on a 'live' circuit or piece of equipment you should:

A) only work 'live' if your supervisor is with you
B) only work 'live' if you feel that you are 'competent' to do so
C) isolate the circuit or equipment before work commences
D) secure the isolation before work commences.