2382 12 sample paper 1

1. BS 7671 applies to




2. BS 7671 provides requirements for safety against the risk of




3. Which one of the following is not a statutory regulation?




4. BS 7671 identifies that the cross-sectional area of a conductor shall be determined by




5. A corridor containing supporting structures for cables and joints and/or other elements of wiring systems, the dimensions of which allow persons to pass freely throughout the entire length, is known as




6. The algebraic sum of the currents in the live conductors of a circuit at a point in the electrical installation is known as the




7. An assembly of PV arrays is defined as a




8. With reference to the nature of the supply, which one of the following can be determined by calculation, enquiry or measurement?




9. Every installation should be divided into individual circuits to




10. Diversity may be taken into account when considering




11. Which one of the following is not a characteristic of the supply?




12. BS 7671 requires designers to take into account the frequency and quality of maintenance an installation can reasonably be expected to receive when




13. Which one of the following is not part of the requirements for fault protection?




14. The maximum disconnection time for a TN system with a nominal voltage of 400 V a.c. to Earth is




15. For a TT system, which one of the following conditions should be fulfilled for each circuit protected by an RCD?




16. A 32 A type B circuit-breaker is used to give a disconnection time of 5 seconds in a reduced low voltage system with a nominal voltage to Earth (Uo) of 55 V. What is the maximum value of earth fault loop impedance (Zs)?




17. A SELV source can be derived from which one of the following?




18. Which one of the following cannot be used as basic protection?




19. In order to provide basic protection, a horizontal top surface of a barrier or enclosure that is readily accessible shall provide a minimum degree of protection of




20. Where arcs, sparks or particles at high temperature may be emitted by fixed equipment in normal service, the equipment shall be




21. Except where otherwise recommended by the manufacturer, spotlights and projectors rated at over 100 W and up to 300 W shall be installed at a minimum distance from combustible materials of




22. In locations with increased risks of fire, motors which are automatically or remotely controlled, or which are not continuously supervised, shall be protected against excessive temperature by




23. Where particular risks of fire exist, the classification for high density occupation areas with easy conditions of evacuation is




24. When considering protection against overload, the symbol for the current ensuring effective operation of the protective device in the conventional time is




25. For protection against overvoltage a 230 V electricity meter should have an impulse withstand of




26. What is the impulse category of equipment that is part of the fixed electrical installation and other equipment where a high degree of availability is expected?




27. If the construction of equipment is unsuited to the external influences of its location, it should be




28. A permanent label to BS 951 bearing the words `Safety Electrical Connection - Do Not Remove' is not required at




29. A 70 °C thermoplastic insulated and sheathed cable to BS 6004 is installed in an ambient temperature of 25 °C for part of the run and then enters an area at 40 °C. The effect on the cable will be to




30. A firefighter's switch shall be provided in the low voltage circuit supplying exterior electrical installations and interior discharge lighting operating at




31. A plug and socket-outlet may be used for switching off for mechanical maintenance as long as it does not have a rating exceeding




32. If an area within an installation undergoes a 10 °C rise in ambienttemperature, the effect on the current-carrying capacity of cables will be to




33. A multicore 70 °C thermoplastic cable with 2.5 mm2 conductors supplies a single-phase load of 20 A at 230 V a.c. over a distance of 22 metres. The voltage drop in the cable will be




34. Where a 3-core cable, with cores coloured brown, black and grey, is used as a switch wire for two-way or intermediate control, the terminations of the conductors shall be identified using




35. Which one of the following cannot be used as an earth electrode?




36. An earthing conductor buried in the ground is protected against corrosion by a sheath, but is not protected against mechanical damage. The minimum size copper conductor that may be installed is




37. Assuming that both the line and protective conductors are of the same material, for a line conductor of 10 mm2 if the protective conductor is to be selected, the minimum tabulated cross-sectional area of its associated protective conductor is




38. A radial final circuit feeding socket-outlets supplying several items of data processing equipment has a total protective conductor current in normal service of 18 mA. This circuit must have a high integrity protective conductor




39. A static type uninterruptible power supply source shall comply with




40. Where an autotransformer is connected to a circuit having a neutral conductor, the common terminal of the winding shall be connected to the




41. When selecting wiring systems for safety services, the type of cable that should be used in fire conditions should comply with




42. When carrying out a visual inspection of an electrical installation, which one of the following does not have to be verified?




43. Certain information must be made available to persons carrying out inspection and testing of an installation before the testing commences. One such item of information would be




44. When carrying out an inspection of a new installation, it is not necessary to verify the




45. An insulation resistance test is to be carried out on a 3-phase 400 V circuit. The test voltage and minimum acceptable reading would be




46. When an addition is made to an existing installation, the contractor shall record on the Electrical Installation Certificate or the Minor Electrical Installation Works Certificate any




47. After completion of a periodic inspection, the completed documentation shall be given to the




48. In a room containing a bath, electrical equipment installed in zone 0 shall have a degree of protection of at least




49. A flush downlighter in the ceiling less than 2.25 m height above floor level over a bath will need to fulfil the requirements of




50. Which of the following protective measures is permitted in a room containing a bath or shower?




51. In a swimming pool or other basin, the metallic covering or sheath of a wiring system in zones 0, 1 or 2 shall




52. The requirements of Section 704 of BS 7671 apply to




53. In locations where livestock is kept, for all circuits other than socket-outlet circuits, an RCD shall be provided with a rating not exceeding




54. Equipment on a pontoon in a marina that is subject to impact to level AG2 should have a mechanical protection code of




55. For marinas, the classification of external influence which does not need to be considered is




56. The particular requirements for mobile or transportable units apply to




57. Electric dodgems shall only be operated at voltages not exceeding




58. The requirements of the licensing authority should be ascertained for




59. I2 can be greater than 1.45 lZ when the overcurrent device




60. External influences coded BE are classified as




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