Based on C&G2382 - BS7671:2018 (Amendment 2:2022) Electrical Regulations revision

BS7671:Amendment 2:2022 is which one of the following
1. non-statutory publication
2. statutory publication
3. publication designed only for the use of electricians
4. publication used only for the design of new electrical installations
The fundamental principles of BS7671 states that persons and livestock shall be protected against injury caused by overvoltages that originate from
1. atmospheric events
2. generation of voltage
3. electrical equipment that is on
4. faulty circuits
The fundamental principles of BS7671 states that protection against voltage disturbance in an installation shall have an adequate level of immunity against
1. electromagnetic disturbance
2. loss of voltage
3. low circuit loading
4. excessive vibration
Identify the maximum calculated Zs value of a C-type circuit breaker
1. 2.19 ohms
2. 1.15 ohms
3. 1.44 ohms
4. 3.45 ohms
Define en electric hair-dryer which is 'double insulated'
1. class II
2. class I
3. class V
4. band 2
An electrical installation certificate should only be signed by whom
1. competent person
2. local authority
3. customer
4. supply authority
Regarding External Influences, identify the protection offered by code AD4
1. IPx4
2. IPx0
3. IPx3
4. IPx5
Regarding External Influences, identify the protection offered by code AD1
1. IPx0
2. IPx4
3. IPx3
4. IPx5
Regarding External Influences, identify the ambient temperature range offered by code AA5
1. +5 to +40 degrees C
2. -10 to + 25 degrees C
3. -25 to + 35 degrees C
4. +10 to +40 degrees C
Regarding External Influences, identify the ambient temperature range offered by code AA1
1. -60 to +5 degrees C
2. +10 to + 25 degrees C
3. -25 to + 35 degrees C
4. +10 to +40 degrees C
BS7671 states that 'electrical installation shall be divided into circuits to'
1. reduce electromagnetic disturbance
2. facilitate easier access for testing
3. enable equal distribution of power
4. minimise electrical faults
Identify the point of measurement for determination of the External Impedance (Ze) of an installation
1. at the origin
2. at the furthest point
3. after the distribution board
4. at the mid-point
The maximum disconnection time for a 230v A.C final circuit on a TN system that does not exceed 32A is
1. 0.4 secs
2. 1 sec
3. 5 secs
4. 0.2 secs
The maximum calculated Zs value for a 16A type 'B' circuit breaker is
1. 3.73 ohms
2. 1.44 ohms
3. 0.88 ohms
4. 5.97 ohms
Undervoltage protection is required when the restoration of the electrical supply following a power cut could cause
1. unexpected start up of machinery
2. circuit overloads
3. nuisance tripping of protective devices
4. high start up currents
Identify the device that cuts off all or part of an installation from every source of electrical supply
1. isolator
2. switch
3. fireman’s switch
4. emergency switching
The maximum calculated Zs value for a 32A type 'B' circuit breaker protecting a standard A1 ring circuit is
1. 1.37 ohms
2. 1.44 ohms
3. 0.88 ohms
4. 0.44 ohms
For a TT installation, distribution circuits shall have a maximum disconnection time of
1. 1 sec
2. 5 secs
3. 0.2 secs
4. 0.4 secs
Identify the operation characteristics of a Residual current device (RCD)
1. a magnetic device that operates due to current imbalance between L and N
2. a magnetic device that operates due to a fault between L and N
3. a bi-metal device that operates due to current imbalance between L and E
4. a bi-metal device that operates due to a fault between L and E
a RCBO can protect against which one of the following fault(s)
1. short circuit, overload and earth leakage
2. overload only
3. earth leakage faults only
4. short circuits only
a RCCB can protect against which one of the following fault(s)
1. earth leakage but not designed for short circuit and/or overload
2. overloads only
3. short circuit, overload and earth leakage
4. short circuits only
in AC systems, in the event of basic insulation failing additional protection can be provided by use of
1. RCD rated at 30mA
2. RCD rated at 100mA
3. supplementary bonding
4. electrical separation
Nuisance tripping that could be caused by switching large Inductive loads can be eliminated by the use of
1. type D MCB
2. type B MCB
3. 30mA RCD
4. 100mA RCBO
If a conductor is buried less than 50mm in a wall and not protected by an earthed metallic enclosure, additional protection is provided by
1. 30mA RCD
2. MCB
3. supplementary bonding
4. functional earth conductor
Which one of the following would not require the fitting of a label of notice
1. copper water pipe
2. bonded gas main pipe
3. earthing terminal within a consumers unit
4. earth electrode
When calculation the Tabulated current for a circuit, the correction factor applicable to a BS3036 fuse is
1. 0.725
2. 0.88
3. 0.94
4. 1
a BS1362 protective devise is also known as
1. cartridge fuse
2. semi-enclosed fuse
3. HRC fuse
4. RCCB
An installation protected by a RCD shall have a fixed notice that includes
1. test at 6 monthly intervals
2. test occasionally
3. test at 3 monthly intervals
4. test monthly
An insulated PEN conductor is identified by
1. green/yellow insulation with blue markings at the terminations
2. blue insulation along its length
3. green/yellow insulation along its length
4. green insulation with blue markings at the terminations
Where a generating set is used as an alternative parallel source of supply, it needs to be installed
1. on the supply side of all protective devices for the final circuits of the installation with no additional requirements
2. on the supply side of all protective devices for the final circuits of the installation with additional requirements in place
3. on the load side of all protective devices for the final circuits of the installation with no additional requirements
4. on the load side of all protective devices for the final circuits of the installation with additional requirements in place
With regard to auxiliary supplies to safety supply services, maximum changeover time refers to
1. the time taken for the safety source to supply power to the safety service after a break in the main power supply
2. the length of time that the safety service can remain powered up once the changeover has occurred
3. the delay time required before the changeover is allowed to occur
4. the total time that the safety service can remain powered by the auxiliary supply
The minimum insulation resistance value allowable for a SELV installation is
1. 0.5M ohms
2. 1M ohms
3. 0.25M ohms
4. 2M ohms
The minimum insulation resistance value allowable for a PELV installation is
1. 0.5M ohms
2. 1M ohms
3. 0.25M ohms
4. 2M ohms
During initial verification of an installation, which one of the following will form part of the inspection checklist
1. presence of diagrams and instructions
2. maximum demand of the installation
3. design specifications
4. diversity allowances
what is measured during a total earth fault loop impedance test on an A1 ring circuit
1. the resistance of the line and protective conductors in the ring plus the external impedance
2. the resistance of the line and neutral conductors in the ring plus the external impedance
3. the resistance of the line and protective conductors only in the ring
4. only the protective conductor resistance
the purpose of a polarity test is to verify
1. every fuse and single-pole device is installed in the line conductor only
2. protective devices are adequate for the circuit
3. conductor insulation is in good order throughout
4. neutral conductors are switching correctly
In an agricultural installation the bonding conductors should be
1. 4mm sq copper
2. 6mm sq copper
3. 10mm sq aluminium
4. 16mm sq aluminium
Suspended cables between buildings on an agricultural installation should be at least how high above ground level
1. 6m
2. 5m
3. 4m
4. 10m
electrical equipment installed within zone 2 of an outdoor swimming pool where no water jets are used should be protected to
1. IPX4
2. IP2X
3. IPXXB
4. IPX8
if SELV is used in an agricultural premises, barriers and enclosures need to offer a protection level of
1. IPXXB
2. IP4X
3. IPX5
4. IP65
in an area that contains a bath or shower, socket outlets are allowed to be installed at least
1. 2.5m horizontally from boundary of zone 1
2. 3m horizontally from of zone 2
3. 3m horizontally from boundary of zone 1
4. 2.5m from boundary of zone zero
the floor temperature of underfloor heating, where contact with footwear of skin is likely, must be limited to
1. 35 degrees C
2. 40 degrees C
3. 20 degrees C
4. 50 degrees C
a mobile unit should have an electrical connection between
1. vehicle chassis and the main earthing terminal
2. neutral and main earth terminal
3. neutral and earth electrode
4. vehicle chassis and supply neutral
the preferred type of insulation on the DC side of a PV installation is
1. class II
2. class I
3. type 3
4. type 1
in areas not subjected to vehicular movement in a marina, overhead cables shall be installed at a minimum height of
1. 3.5m
2. 4m
3. 5.5m
4. 6m
in areas not subjected to vehicular movement in a caravan park, overhead cables shall be installed at a minimum height of
1. 3.5m
2. 4m
3. 5.5m
4. 6m
BS 5839 details the requirements for
1. fire alarms
2. emergency lighting
3. switching devices
4. discharge lighting
BS 5266 details the requirements for
1. emergency lighting
2. intruder alarms
3. isolation devices
4. supply transformers
identify the correction factor for three multicore cables installed as a single-layer on a wall
1. 0.79
2. 0.82
3. 0.77
4. 0.65
Equipment intended for use as life support within a patient environment in a Group 2 medical location forming part of an IT system, excludes which one of the following types of
1. X-ray equipment
2. surgical application equipment
3. all equipment with low power rating
4. freezer equipment
Choice of wiring type and method of installation shall condider all except for
1. load current
2. nature of the location
3. voltage level
4. short circuit current values
Identify the location not recognised as a special location within BS7671
1. Fireworks factory
2. marinas
3. saunas
4. gangways
A component of a support system consisting of elements which are regularly speced and mechanically retains a cable is called a cable..
1. cleat
2. clip
3. retainer
4. bracket
Maintainablity should be considered when assessing
1. reliability of equipment
2. repair costs
3. repair time
4. installation scheduling
PME (protective multiple earthing) is also known as
1. TN-C-S
2. TN-C
3. TN-S
4. TT
Buildings with a shape and dimensions which could facilitate the spread of fire have which classification
1. CB2
2. CA1
3. BE2
4. CA2
When more than one transformer is used to supply an auxiliary circuit it should be connected
1. in parallel on both primary and secondary sides
2. in series on both primary and secondary sides
3. with only the primary sides in parallel
4. with only the secondary sides in parallel
Gangways with closed restriced access shall be accessible by doors from oth ends when gangways are longer than
1. 20m
2. 10m
3. 15m
4. 18m
For a Low voltage Prosumer installation, PEI concept excludes which one of the following
1. UPS systems
2. public power supply
3. heating systems
4. energy management
For a Low voltage Prosumer Electrical Installations, which one of the following is not recognised as a general type of PEI
1. supported
2. individual
3. shared
4. collective

Based on C&G2382 - BS7671:2018 (Amendment 2:2022) Electrical Regulations revision

use BS7671 Amendment 2:2022 regulations book - all sections. 12 random questions from a large bank of questions (references to regulations when necessary are given with correct answers).