Practice Exam 1

Q1 – Which one of the following electrical installations is not in the scope of BS 7671?

Q2 – Which one of the following does BS 7671 apply to?

Q3 – Which of the following parts of BS 7671 will, when complied with, satisfy the requirements of Chapter 13?

Q4 – Which one of the following is a requirement for a single pole fuse in existing installation?

Q5 – An enclosure for the protection of cables having one side which is removable or hinged is cable

Q6 – The figure shown illustrates a typical ring final circuit. The spur is indicated by

Q7 – Which of the following characteristics for the supply to a building could not be determined by an enquiry to the distributor? The

Q8 – A recognised source for a safety service is

Q9 – Where an installation contains more than one final circuit, all the

Q10 – Which one of the following needs to be considered in order to identify the characteristics of equipment likely to have harmful effects on other electrical equipment?

Q11 – Which one of the following ensures safe inspection, testing and maintenance for all installations?

Q12 – Which one of the following should be determined when assessing the characteristics of the supply or supplies?

Q13 – Where socket-outlets are likely to be used by persons of capability BA1, BA3 or children 9BA2 , BA3) they must be protected by an RCD when the socket-outlet rating does not exceed

Q14 – With which of the following methods can both basic and fault protection be achieved?

Q15 – Which one of the following conditions must apply when an installation uses more than one protective measure against faults?

Q16 – What is the maximum voltage of a separated circuit where electrical separation is the operative measure?

Q17 – If a circuit forming part of 230 V TT system has an earth fault loop impedance value (Z_s) of 500Ω the rated residual operating current of an RCD would need to be equal to or less than

Q18 – Where ADS is not feasible in accordance with 411.3.2 for installations with power electronic controllers:

Q19 – The maximum disconnection time for a circuit supplied at reduced low voltage is

Q20 – What type of fuse system is a ‘bolted’ BS88-2 fuse?

Q21 – Installed electrical equipment which contains a significant quantity of flammable liquid require measures to prevent the spread of the liquid. Which one of the following is considered to be in the minimum quantity to be classed as significant?

Q22 – In a location where a particular risk of fire exists, any temperature cut-out device must:

Q23 – Type D circuit-breakers to BS EN 60898 should be installed to protect circuits subjected to

Q24 – The rated conditional short-circuit current of a busbar trunking system complying with BS EN 61439-6 shall not be lower than

Q25 – Undervoltage protection would be required where loss and subsequent restoration of voltage may cause the

Q26 – Which situation would require the installation of AFDDs?

Q27 – What is the minimum distance between information technology cables and equipment, such as discharge lamps when considering measures against electromagnetic disturbances?

Q28 – A supplementary bonding conductor is a

Q29 – Which one of the following is a requirement when installing equipment not covered by a British or Harmonised standard?

Q30 – Which one of the following colours must be used to identify a line conductor in a control circuit?

Q 31 – Which one of the following connections does not require a durable label with the words “Safety Electrical Connection – Do Not Remove” permanently fixed?

Q 33 – What percentage of triplen harmonics, above the fundamental line current, may require an increase in the cross-sectional area of the neutral conductor?

Q 33 – If a cable is totally enclosed in thermal insulation for a distance of 2 m, the derating factor (CI) will be

Q 34 – Non-sheathed cables used for fixed wiring should be

Q 35 – As a means of isolation in a circuit, it is not permissible to use a

Q 36 – When a residual current monitor (RCM) is installed downstream of a 100 mA RCD then the recommended rated residual operating current of the RCM must not exceed

Q 37 – Where specified AFDDs shall be installed

Q 38 – Providing necessary precautions are taken, a metallic pipe may be used as an earth electrode if it

Q39 – Which one of the following is the maximum permitted rating of over current protective device for a lighting circuit incorporating a B15 lamp holder?

Q40 – Which one of the following classes of ballasts, may only be used on flammable surfaces?

Q41 – Which of the following would not be suitable as a source of supply for safety services?

Q42 – What is the minimum value of insulation resistance permitted for a 25V AC circuit supplied by an isolating transformer to BS EN 61558-2-6

Q43 – Inspection of the provision of basic protection would not include the

Q44 – When carrying out a detailed inspection, which one of the following must be verified? The

Q45 – Why should continuity testing be undertaken before insulation resistance testing during an initial verification of a small commercial unit

Q46 – Which one of the following is not classified as an outdoor lighting installation?

Q47 – Which one of the following is the minimum degree of IP protection for equipment installed in zone 0 of a swimming pool?

Q48 – Which one of the following is the maximum number of vehicles that can be connected to a single charging socket-outlet?

Q49 – Within Zones 0 and 1 of a swimming pool, a protective provision against electric shock should be by means of

Q50 – Which one of the following protective measures must be used for switches, not incorporated in equipment, in Zone 1 of a bathroom?

Q51 – When underfloor heating is provided in a swimming pool, the electric heating unit embedded in the floor should incorporate an earthed metallic sheath connected to

Q52 – At what height, except in special environmental conditions, should socket outlets in caravan parks be placed?

Q53 – What are the requirements of Part 8 of BS7671 intended to cover?

Q54 – What should a single-phase value of prospective fault current be multiplied to give a suitable approximation of the 3 phase values?

Q55 – Which mode means a prosumer’s installation is cut off from the public supply

Q56 – Guidance on considerations when taking measurements of earth fault loop impedance with regard to ambient temperature can be found in

Q57 – The rating factor for 90^oC thermosetting cable installed in an ambient temperature of 40^oC is

Q58 – A conduit is required to carry eight single-phase circuits wired in single-core thermoplastic insulated cables. The cables are all of the same size and equally loaded. Which one of the following is the grouping rating factor to be used in determining the cross-sectional area of the conductors?

Q59 – A building whose structure has an external influence category CB4

Q60 – Details on current-carrying capacity and voltage drop for busbar trunking and power track systems can be found in