Free Printable Inspection and Testing Sample questions

1.

1. The non-statutory document that is applicable to the probes and leads of test equipment is:

a)

a. HSE Guidance Note GS 38

b)

b. BS7671

c)

c. The IET On Site Guide

d)

d. IET Guidance Note 3.

2.

The following tests may be carried out on a new installation:

1. polarity

2. insulation resistance

3. ring final circuit continuity

4. cpc continuity.

The relevant test in the correct sequence for a new ring final circuit are:

a)

a. 2,1,4

b)

b. 1,2,4,3

c)

c. 3,1,2

d)

d. 3,2,1.

3.

3. If the length of a cable is doubled the insulation resistance will be:

a)

a. quartered

b)

b. halved

c)

c. remain the same

d)

d. doubled.

4.

4. If the length of a cable is doubled the resistance will be:

a)

a. quartered

b)

b. halved

c)

c. remain the same

d)

d. doubled.

5.

5. When carrying out an initial verification, a check for polarity is carried out when energising of the installation for the first time. This is to confirm:

a)

a. correct connection of the incoming supply

b)

b. correct connection of equipment

c)

c. operation of the main isolator

d)

d. operation of the supply fuse.

6.

6. A continuity of protective conductors test is carried out using a:

a)

a. continuity tester

b)

b. low reading ohmmeter

c)

c. low resistance ohmmeter

d)

d. insulation tester.

7.

7. An increase in conductor operating temperature will result in:

a)

a. an decrease in conductor resistance

b)

b. an increase in conductor resistance

c)

c. an increase in insulation resistance

d)

d. no apparent change in resistance or insulation resistance.

8.

8. The maximum permitted voltage drop for a low voltage lighting circuit supplied directly from the public supply is:

a)

a. 2%

b)

b. 3%

c)

c. 4%

d)

d. 5%.

9.

9. External earth fault loop impedance Z_e for an installation must be measured at:

a)

a. a convenient point on the installation with the earthing conductor connected

b)

b. a convenient point on the installation with the earthing conductor disconnected

c)

c. the origin of the installation with the earthing conductor connected

d)

d. the origin of the installation with the earthing conductor disconnected.

10.

10. The maximum tabulated earth fault loop impedance value for a 32A Type C circuit breaker to BS EN 60898 is 0.68Ω. The maximum measured earth fault loop impedance permitted for a circuit protected by this device is:

a)

a. 0.40Ω

b)

b. 0.54Ω.

c)

c. 0.68Ω

d)

d. 0.82Ω

11.

11. Following the installation and completion of a new circuit the following should be issued:

a)

a. EICR

b)

b. EIC

c)

c. MEIWC

d)

d. Schedule of results.

12.

RCD testers display the test result in:

a)

a. Millivolts

b)

b. Ohms

c)

c. Milliseconds

d)

d. Mohms.

13.

13. An approved voltage indicator should have test leads fused at:

a)

a. 0.5A

b)

b. 1A

c)

c. 3A

d)

d. 5A.

14.

14. A 30mA RCD utilised for additional protection when tested at 150mA should operate within:

a)

a. 5 secs

b)

b. 0.4 secs

c)

c. 100ms

d)

d. 40ms.

15.

15. The top surface of switchgear giving IP4X protection would be checked with wire of csa:

a)

a. 4mm²

b)

b. 2.5mm²

c)

c. 1.5mm²

d)

d. 1mm².

16.

16. The minimum acceptable value for an insulation resistance test on a SELV circuit is:

a)

a. 1MΩ

b)

b. 0.5MΩ

c)

c. 0.25MΩ

d)

d. 0.1MΩ.

17.

17. A 32A BSEN60898 Type B circuit breaker protects a ring-final circuit, the max result allowing for the 0.8 factor should be:

a)

a. 2.11Ω

b)

b. 1.44Ω

c)

c. 1.09Ω

d)

d. 0.57Ω.

18.

18. The open circuit resistance values on a ring-final circuit were r₁= 0.6Ω , r_n= 0.6Ω and r₂= 0.96Ω. What would be the R1 + R2 value expected for the circuit:

a)

a. 0.36Ω

b)

b. 0.39Ω

c)

c. 1.2Ω

d)

d. 1.56Ω

19.

19. A test on 6 circuits reveals a test result of 1.6MΩ, what as the inspector and tester would you do:

a)

a. Record the reading

b)

b. Change the tester and retest the installation

c)

c. Consider dividing the installation and retest

d)

d. Notify your supervisor of a fault.

20.

20. A circuit under test has a link between line and cpc at one end with a low resistance ohmmeter connected between the same conductors at the other end. The test could indicate:

a)

a. Insulation resistance and R1+R2 value

b)

b. Polarity and R1+R2 value

c)

c. Loop impedance and R1+R2 value

d)

d. Continuity and R1+R2 value.

Inspection and Testing Sample questions

Total questions: 20

Worksheet time: 40mins

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