To ensure an economic and reliable design, what should be determined?

d) The nature of the current and frequency

Which of the following is an assessment of the compatibility of characteristics, of equipment used?

d) Purpose, supplies and structure

Which of the following is an assessment of general characteristics?

a) The purpose for which the installation is intended to be used

c) The diversity factor that may be applied

d) The current carrying capacity of the conductors

A general hospital operating theatre needs to ensure the electrical supply will not be cut off during critical operations; and as such an assessment for continuity of service must be conducted; which of the following must be considered?

a) The operating theatre equipment reliability

b) The emergency backup supply system

c) The oxygen supply system feeder-pump

The arrangements of current-carrying conductors shall be assessed under which of the following conditions?

a) Primary operating conditions

b) Abnormal operating conditions

d) Overload operating conditions

The method of protection by use of non-conducting locations is?

d) Not recognised for general application

a) Usually reserved for travelling fairgrounds and circuses

b) Regularly used throughout commercial installation

c) Used wherever water is present such as marinas

When selecting a device for overload protection, the device must be co-ordinated with the conductor to ensure?

d) The current l2 causing effective operation of the protective device does not

a) The continuous service current of the cable is 1.45 times higher than the current causing the overload

b) The design current of the circuit is less than the rated current of the protective device

c) The rated current of the protective device exceeds the lowest rated capacity of any cable

Which of these is not an example of an extraneous-conductive part?

a) Metal trunking enclosing cables

c) Exposed metallic structural part of a building

d) Water pipe feeding a gas boiler

Where the transfer of supply to an alternative supply is to take place in a TN system, a multi-pole switch must be used which switches the line and neutral conductors, this method prevents?

a) Electromagnetic fields due to stray currents in the main supply system

b) The earth-fault loop impedance exceeding maximum values

c) The prospective fault current tripping the main protective circuit breaker

d) The rated residual current tripping any RCD devices

Simultaneously accessible exposed-conductive parts shall be connected to the same earthing system?

b) Individually, in groups or collectively

d) Through a high resistance impedance

The external influence code CA2 refers to?

b) Where a building is mainly constructed of combustible material e.g. wood

a) Where a building is subject to ground tremors

c) Where a building is subjected to heavy water waves

d) Where a building is subjected to extreme ultra-violet radiation

In an IT system that does not have a neutral conductor it is permitted to omit a device to provide overload protection if?

d) An RCD is installed in each circuit

a) The DNO supply fuse will provide this protection

b) The IT earth-impedance is sufficiently high enough

c) Harmonic currents will not be present

New to the 18th edition wiring regulation is a requirement with regards to luminaires in domestic premises which requires additional protection to final circuits by means of?

a) Ceiling roses to BS:67 which must be SELV

b) Conduit for cables to prevent nails and screws damaging cables

In locations where BE2 conditions exist, and where cables are bunched or installed in long vertical runs, the risk to the cables is?

a) From sagging due to the weight of the cables

Where a private source for a safety service can operate in parallel with the public supply systems, permission to operate the source must be obtained from?

c) The distribution network operator (DNO)

d) The heaIth and safety executive

Three circuits can share the same ducting system, provided?

a) Every cable is insulated to the highest voltage present

b) Only plastic ducting is used

d) The cables are separated by 500 mm

A powertrack system shall be installed in accordance with the manufactures instructions, taking into account?

a) The number of bunched circuits

b) The maximum prospective fault current of the conductors

d) The maximum temperature rating of the track

Who shall make an initial verification of a new installation?

b) The person ordering the work

With regards to initial verification and testing, the verification process shall include comparison of the results with the relevant criteria to confirm that the requirements of the regulations?

a) Are the same as the previous test resuIts

b) Are no worse than the previous test results

d) Have been recorded in the schedule or works results

Protective bonding conductors for use on agricultural land shall be protected against mechanical damage, corrosion and electrolytic effects. Which of the following would not be a suitable means for providing such protection?

a) Hot-dip galvanized strip-steel

b) Hot-dip galvanized round-steel

d) Copper conductors having a minimum c.s.a of 4 mm2

18th Edition complete mock 2

Authored by Gareth Wyatt

Other

Professional Development

Used 7+ times

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61 questions

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Conductors shall be identified in accordance with?

a) Section 512

b) Section 513

c) Section 514

d) Section 515

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

BS 7671 may need to be supplemented by the requirements or recommendations of which other document when applied to electric surface heating systems?

a) BS EN 60335-2-96

b) BS EN 12954

c) BS EN 13174

d) BS EN 13636

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

BS 7671 includes requirements for?

a) Electric fences installed on farm-land

b) Wiring systems and cables not specifically covered by the standards for appliances

c) Lift installations in office blocks

d) Wiring systems on military aircraft

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

BS 7671 is?

a) Non-statutory and cannot be used as evidence to show compliance in a court-of-law

b) Statutory and cannot be used as evidence to show compliance in a court-of-law

c) Non-statutory but can be used as evidence to claim compliance with a statutory requirement in a court-of-law

d) Statutory and can be used as evidence to show compliance in a court-of-law

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is this statement a definition of: 'Protection against electric shock under fault-free conditions?

a) Fault protection

b) Direct contact

c) Indirect contact

d) Basic Protection

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Where can further information on Zx be found?

a) Part 2

b) Part 3

c) Appendix 4

d) Appendix 13

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

EMC regulations are referred to in BS 7671, what does EMC refer to?

a) Electrical Magnetic Compatibility

b) Electronic Magnetic Compatibility

c) Earthed Magnetic Compatibility

d) Electromagnetic Compatibility

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