18th Edition Practice Exam – Paper 2 (Inspection & Testing Focus)

1. The protective device rating (In) must be:

A) Greater than cable Iz B) ≤ cable Iz C) Equal to Ze D) Equal to Zs

2. Long run, high‑load circuits commonly require:

A) AFDD only B) The smallest CSA possible C) Increased conductor CSA D) Colour change

3. For equal performance, aluminium conductors typically require:

A) Larger CSA than copper B) Smaller CSA than copper C) Same CSA as copper D) Colour coding changes

4. Shaver sockets in bathrooms must be supplied via:

A) RCD B) RCBO C) Isolating transformer D) SPD

5. Bathroom Zone 0 refers to:

A) The area above 2.25 m from the floor B) The area within 0.6 m horizontally from bath C) The area around the washbasin D) Inside the bath or shower basin

6. Standard 230 V socket-outlets in bathrooms are:

A) Allowed in Zone 1 with RCD B) Not permitted in Zones 0–2 C) Allowed anywhere with AFDD D) Allowed only in Zone 0 with SELV

7. Supplementary bonding in bathrooms connects:

A) Line to CPC B) Neutral to CPC C) Earth to SPD D) Extraneous-conductive-parts to CPC

8. Bathroom Zone 2 extends:

A) 0.6 m horizontally beyond Zone 1 B) 2.25 m vertically above Zone 0 C) Only behind mirrors D) 3.0 m from the shower head

9. Luminaires installed in bathroom Zone 1 must be:

A) IP20 minimum B) Protected by SPD C) Rated at least IPX4 D) Supplied via AFDD

10. Equipment located in bathroom Zone 0 requires at least:

A) IPX4 B) IPX7 C) IP44 D) IP65

11. The design current (Ib) must be less than or equal to:

A) Ze B) Zs C) RCD rating D) Effective cable capacity after corrections

12. In agricultural premises, equipment selection should consider:

A) Lux levels only B) Colour of enclosures C) External influences (dust, moisture, animals) D) Presence of SPDs only

13. Emergency isolation in agricultural premises should be:

A) Hidden near the equipment B) Lockable only C) Remote-only control D) Readily accessible

14. Additional protection in agricultural premises is commonly provided by:

A) AFDDs only B) 30 mA RCDs C) SPDs only D) 300 mA RCDs only

15. Panels feeding buried cables should have:

A) Clear route labels/warnings B) Colour‑matched paint C) Neutral switching D) SPD labels only

16. Sockets in agricultural premises should be at least:

A) IP44/IP54 depending on location B) IP20 C) IPX2 D) IP68 always

17. In potentially corrosive atmospheres, equipment should be:

A) Plastic only B) Standard domestic grade C) Corrosion-resistant and appropriately rated D) Painted for aesthetics

18. Mechanical protection in agricultural premises is important because:

A) Voltage drop increases B) AFDDs require it C) SPD clamping D) Animals and machinery can damage cables

19. Switchgear in agricultural premises should be:

A) Dust- and moisture-protected B) Painted green C) Installed outdoors only D) Unenclosed for ventilation

20. Which device is used to protect against transient overvoltages?

A) SPD B) RCBO C) MCB D) Isolator

21. External influences in agricultural premises must be considered under:

A) 536.4 B) 411.3.2 C) 301.1 D) 514.9

22. Caravan and camping parks are covered by:

A) 708 B) 709 C) 711 D) 722

23. Caravan park pitches typically require:

A) Shared supplies only B) AFDDs on all pitches C) SPD-only protection D) Individual protected supplies with RCD

24. Outdoor pitch sockets should be at least:

A) IP20 B) IP44/IP54 depending on conditions C) IPX2 D) IP65 always

25. Pitch supplies should include:

A) Only MCB B) Only SPD C) MCB/RCBO and 30 mA RCD protection D) AFDD only

26. Pitch supply points must be:

A) Hidden B) Unlabelled C) Painted only D) Clearly labelled and documented

27. Isolation for pitch supplies should be:

A) Only at the origin B) Provided locally at each pitch C) Not required D) Remote-only

28. Shock risk outdoors is commonly mitigated by:

A) 30 mA RCDs B) AFDDs C) SPDs D) Only MCBs

29. Supply pillars in caravan parks should be:

A) Open-frame B) Unlocked C) Weather-resistant and lockable D) Located indoors only

30. Periodic inspection intervals for caravan parks should consider:

A) Colour scheme B) Manufacturer preferences C) AFDD presence only D) Usage, environment, and external influences

31. SWA terminations should include:

A) Correct glands and armouring earthing B) Neutral switching C) Adhesive tape only D) SPD on the gland

32. Marina sockets should be:

A) IP20 B) Indoor-only specification C) Corrosion-resistant and suitably IP-rated D) Neutral-switched only

33. Shock protection at marinas commonly uses:

A) AFDDs only B) 30 mA RCDs C) SPDs only D) Ze reduction

34. Isolation at marinas should be provided:

A) Locally at berths/outlets B) Only at the origin C) Not required D) Via SPD-only

35. Marina earthing arrangements should consider:

A) Colour coding only B) AFDD settings C) Lighting photometry D) PME restrictions and TT alternatives

36. Boat supply connectors and cords should be:

A) Domestic two-pin B) Marine-grade and weather-resistant C) Uninsulated for cooling D) Neutral-switched only

37. Documentation at marinas should include:

A) EICR with schedules of test results B) PAT certificates only C) CE statements D) Manufacturer brochures

38. Berth outlets and panels should be:

A) Hidden B) Unmarked C) Clearly labelled D) Neutral-switched

39. SPDs at marinas are useful to:

A) Reduce Ze B) Detect arc faults C) Replace RCDs D) Clamp transient overvoltages

40. Shock protection at marinas relies primarily on:

A) AFDD-only B) ADS and RCDs C) SPD-only D) Neutral switching

41. For external buried runs, select:

A) Twin‑and‑earth B) Flexible PVC cords C) Steel wire armoured (SWA) D) Mineral insulated in plastic duct

42. Protective measures in medical locations must consider:

A) Equipment reliability and patient safety B) Only aesthetics C) Only voltage drop D) AFDDs only

43. In some medical locations, supplementary bonding is used to:

A) Reduce lux levels B) Limit touch voltages C) Increase short-circuit current D) Replace RCDs

44. Medical IT systems are used to:

A) Increase earth leakage B) Replace all RCDs C) Reduce shock risk via isolation D) Provide higher Ze

45. Documentation in medical locations should include:

A) Detailed test results and maintenance schedules B) Colour charts C) Paint spec only D) CE statements only

46. RCDs in medical locations should be:

A) Always 10 mA B) Absent C) Replaced by SPDs D) Selected to avoid nuisance tripping

47. Maintaining safe touch voltage near patients uses:

A) AFDD-only B) Equipotential bonding and isolation C) Lighting control D) Neutral switching

48. Periodic verification in medical areas is:

A) Essential for ongoing safety B) Optional C) Only visual D) Replaced by AFDDs

49. External influences in medical areas include:

A) Only lux levels B) Paint durability C) Cleaning fluids, moisture, equipment movement D) Cable colours only

50. Critical medical circuits should be designed for:

A) Maximum voltage drop B) Frequent disconnections C) Only AFDD protection D) Continuity of supply and selectivity

51. Buried cables should be routed:

A) Adjacent to gas pipes without separation B) With separation from other utilities C) Directly above hot water pipes D) In unsealed ducts

52. Minimum RCD rating for EV charge points is:

A) 10 mA B) 30 mA C) 100 mA D) 300 mA

53. EV charging on PME supplies may require:

A) Special measures or alternative earthing B) Neutral switching C) Removing RCDs D) AFDD-only

54. RCD type in EV charging should consider:

A) Only Type AC B) Only Type B C) Only Type A D) Equipment DC leakage characteristics

55. EV charging point enclosures should be:

A) IP20 B) Weather-protected and labelled C) Unlabelled D) Neutral-switched

56. IP ratings primarily indicate resistance to:

A) Voltage drop B) Grouping factors C) AFDD arcs D) Dust and water ingress

57. Temporary installations at exhibitions require:

A) No documentation B) Only PAT labels C) Clear documentation and isolation D) AFDD-only

58. Shock protection at exhibitions commonly uses:

A) Ze reduction B) Neutral switching C) Only AFDDs D) 30 mA RCDs

59. Chemical exposure requires materials that are:

A) Aesthetic B) Chemically resistant C) Colour fast D) Neutral‑switched

60. Prosumer design should include:

A) Coordination, anti-islanding, and documentation B) Neutral switching only C) AFDD-only protection D) No testing

WOODS-TEC

18th Edition Wiring Regulations Practice Exam – Paper 3

Results