1) Which one of these documents use din the electrical industry are statutory? a) Health and Safety at Work Act 1974 b) BS7671 Requirements For Electrical Installations c) BS7671 On Site Guide. (OSG) d) Guidance Note GS38 Electrical Test Equipment 2) Which diagram would show you where to connect individual cores of a lighting circuit? a) Wiring diagram b) Circuit diagram c) Layout diagram d) Site drawing 3) What does this symbol stand for? a) 1 way light switch b) Intermediate light switch c) Light fitting d) Four gang light switch 4) If a scaled plan is at a ratio of 1:100, how many metres would 5 centimetres be? a) 50 metres b) 0.5 metres c) 5 metres d) 15 metres 5) What cable would you normally find in a domestic property? a) PVC flat sheathed cable b) PVC single core cable c) Steel wire armour cable d) Mineral insulated cable 6) What cable is better equipped for industrial or sub main circuits? a) SY flex b) Steel wire armour c) Flexible d) PVC flat sheath cable 7) What type of cable sheath material is intended to operate at 70 degrees? a) PVC thermoplastic b) Thermosetting c) Mineral Insulated d) Steel 8) How many pairs of cores does a data cable have? a) 4 pairs b) 5 pairs c) 3 pairs d) 2 pairs 9) What cable is best intended to be drawn through plastic conduit? a) PVC singles b) PVC flat sheath cable c) Steel wire armour d) SY flex 10) What are the usual sizes of steel conduit? a) 20 + 25 mm b) 25 + 22 mm c) 16 + 19mm d) 32 + 50mm 11) If 75x75mm trunking has a factor of 2371, what is the maximum amount of 2.5mm cables that can be installed if the cable factor is 11.9? a) 99 b) 105 c) 285 d) 199 12) What is the factor for 20mm conduit that has 2 bends and runs 3.5 metres a) 177 b) 222 c) 500 d) 282 13) What safety feature does a switched interlock socket have? a) It is brightly coloured b) You can unplug it even when it is turned on c) It is very easy to install d) It needs to be switched off to plug in and locks when on 14) What size protective bonding cable would you use if your main earthing conductor is 16mm? a) 6mm b) 10mm c) 16mm d) 2.5mm 15) What is the maximum external earth fault loop impedance for a TN-S system? a) 0.35 b) 0.8 c) 100 d) 0.15 16) What is the maximum external earth fault loop impedance for a TN-C-S system? a) 0.35 b) 0.8 c) 100 d) 0.15 17) What protective device would you use for a ring socket circuit? a) 32 b) 16 c) 20 d) 40 18) If a circuit has a mv/a/m value of 36, an Ib of of 16 and a length of 45m, what is the volt drop value? a) 25.92 b) 36.12 c) 45.7 d) 18.95 19) What is the maximum allowed voltage drop for a lighting circuit? a) 5% b) 2% c) 6% d) 3% 20) What is the maximum allowed voltage drop for a power circuit? a) 6% b) 5% c) 3% d) 2% 21) What earthing system is this? a) TT b) TN-S c) TN-C-S d) IT 22) What earthing system is this? a) TT b) TN-C-S c) TN-S d) IT 23) What type of lighting circuit is this? a) Two way b) Two way and intermediate c) Three way d) Three plate method 24) Which of these light fittings would you expect to find inside a commercial property? a) Pendant b) High bay light c) Lamp Post d) LED strip light 25) What does SELV stand for? a) Supplementary Extra Low Voltage b) Separated Extra Low Voltage c) Safety Extra Low Voltage d) Standard Extra Low Voltage 26) What is the floor area served for an A3 radial circuit? a) 50m squared b) 75m squared c) 100m squared d) 60m squared 27) What is the minimum sized cable you can use for an A2 radial circuit? a) 2.5mm b) 1.5mm c) 4.0mm d) 5.0mm 28) What does IP officially stand for? a) Ingress protection b) Index of protection c) International protection 29) What is the minimum IP code for the horizontal surface of a consumer unit? a) IPX2 b) IPX4 c) IP2X d) IP4X 30) What is the minimum IP code for the vertical side surfaces of a consumer unit? a) IP4X b) IPX4 c) IP65 d) IPX6 31) What is the correct definition of an extraneous conductive part? a) A conductive part liable to introduce a potential, generally earth potential, and not forming part of the electrical installation b) Conductive part of equipment which can be touched and which is not normally live, but which may become live under fault conditions. c) It joins the installation earthing terminal to the earth electrode or to the earth terminal provided by the Electricity Supply Company. d) a conductor that connects the non-current-carrying parts of electrical equipment, raceways, or enclosures to the service equipment or system grounding conductor. 32) What is the correct definition of an exposed conductive part? a) Conductive part of equipment which can be touched and which is not normally live, but which may become live under fault conditions. b) A conductive part liable to introduce a potential, generally earth potential, and not forming part of the electrical installation c) a conductor that connects the non-current-carrying parts of electrical equipment, raceways, or enclosures to the service equipment or system grounding conductor. d) It joins the installation earthing terminal to the earth electrode or to the earth terminal provided by the Electricity Supply Company. 33) What is the correct formulae for calculating Zs? a) Zs= Ze+(R1+R2) b) Ze= Zs+(R1+R2) c) Zs= R1+Rn + Ze d) Zs=Rn/Ze 34) What is the correct BS number for an MCB? a) 60876 b) 60898 c) 60947-3 d) 61009 35) What is the correct BS number for an RCBO? a) 61009 b) 61008 c) 60898 d) 1361 36) What BS number is this type of fuse? a) 60898 b) 3036 c) 1361 d) 61009 37) What is the symbol for ambient temperature correctional factor? a) Ct b) Ca c) Cf d) Cd 38) If a cable has a length of 12 metres, a mv/a/m value of 15 and a design current of 6A, what is the volt drop value? a) 18 volts b) 1.08 volts c) 15 volts d) 4.2 volts 39) If an appliance is rated at 1800 watts, what size plug top fuse does it need? a) 13 amp b) 10 amp c) 5 amp d) 3 amp 40) If a circuit has a voltage rating of 50V, and a resistance of 16 ohms, what current does it produce? a) 4.567 amps b) 1.674 amps c) 2.587 amps d) 3.125 amps

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