Practice Exam Questions – 18th Ed – AMD 2 – 2022

Which of the following electrical installations does BS 7671 not apply?

BS 7671 includes the requirements for

BS 7671 requires protection against electric shock to be provided by basic and fault protection.  One method common to both modes of protection is

Which one of the following types of electrical installation is not covered by BS 7671?

When applied to a electric surface heating systems, BS 7671 may need to be supplemented by the requirements or recommendations of which other documents?

BS 7671 provides requirements for safety against the risks of …

BS7671 applies to

BS 7671 does NOT provide requirements for safety against the risk of  …

The selection of the type of wiring and method of installation is not influenced by

Voltage range covered by BS 7671

Band II voltage exceeds

A protective conductor connecting exposed-conductive-parts of equipment to the main earthing terminal is known as the

Band 1 voltage value is 

Mechanically and electrically integrated assembly of PV modules is

An earthing arrangement in which two earth electrodes are used is called

To ensure continuity of supply to one part of the installation in the event of failure of another part, one approach is

An assessment must be made of the harmful effects of harmonic currents of equipment on other electrical equipment.  This assessment is

Every installation shall be divided into circuits as necessary in order to

Which one of the following is not a potential characteristic of equipment to be considered for harmful effects on other equipment?

When making an assessment of the frequency and quality of maintenance, a factor to be considered is that

A 32 A BS 88-3 fuse with U_o of 230 V has a maximum tabulated Z_s for 5 seconds disconnection of

Which of the following is a requirement in terms of fault protection where the protective measure of electrical separation is employed?

An RCD can be used as additional protection in the event of failure of the provision for basic protection when the RCD has a rating not exceeding

Basic protection can be provided by

BS7671 applies to?

When considering the compatibility of a large three-phase AC motor, with

regards to the other equipment installed on-site we should consider the effects

of

An Extra-low voltage system which is electrically separated from earth and is

supplied by a recognised safety source is defined as

The maximum disconnection time for a 16 A final circuit, where Uo = 230 V AC,

forming part of a TN system is

To ensure compliance with BS7671, all overcurrent protective devices without

back-up protection on the supply side must be capable of :

Which of the following methods should be adopted where fixed equipment with

a high surface temperature is likely to have an adverse effect on adjacent

materials?

If a protective device has operated and restoration of the supply is likely to

cause danger the re-closure must be

Which of the following methods provides protection against both Basic and

Fault Protection?

In order to comply with BS7671, the maximum permitted earth loop impedance

for a 32 A BS 88-G fuse protecting a cooker is

Correct co-ordination between fuse ratings in an electrical system is termed

To provide protection against electric shock, the protective measure of double

insulation relies on basic insulation and

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

is

Where particular risks of fire exist in an area of high density occupation with

difficult conditions of evacuation, the external influence code would be

Where the overcurrent protective device is intended to afford protection against

overload, I2 must not exceed IZ by

In AC systems additional protection by RCD’s rated at 30 mA or less must be

used

The earth fault loop impedance Zs for a final circuit is determined by

Metal conduits, trunking and consumer units must comply to

Where an installation forms part of a TN-C-S system, the main protective

bonding conductor must have a minimum cross sectional area of

Where an installation of street furniture forms part of a TN system using 10 mm2 neutral, the main protective bonding conductor must have a minimum cross sectional area of

Which of the following is used to determine the rated current of an overcurrent

protective device

The design of a safety circuit should include which one of the following

PVC/PVC twin + cpc flat cable, when installed in a wall in a dwelling at a depth

of less than 50 mm, and earthed metallic conduit, are permitted by regulations

to be run

A label marked with the words ‘Safety Electrical Connection – Do Not Remove’

must be fixed at or near

A copper earthing conductor not mechanically protected but protected against

corrosion buried in soil. The minimum cross-sectional area of the earthing

conductor should be

A firefighter’s switch should be installed at not more than

Cross sectional area of ring network conductor is

The type of distribution system known as PME is an earthing arrangement

found in a

IP code for swimming pool Zone 0

IP code for bathroom  Zone 1

The purpose of the integral test button of an RCD is to check the

The maximum recommended voltage drop for a 230 V single-phase lighting

circuit, fed from the public LV distribution system is

What does PEI stand for ?

A recognised suitable supply for safety services is a

A reduced 250 V DC test of insulation resistance may be applied to a 230 V

distribution board when

Which one of the following tests can only be carried out after the supply is

connected

The recommended test voltage (DC) and minimum insulation resistance value

for an SELV circuit is

In agricultural premises, in the absence of manufacturer’s instructions, heating

equipment should be placed at a distance from livestock, not less than