Initial verification, periodic and minor works - Inspection and Testing mock test (closed book)

identify the maximum Continuity value for Equipotential Bonding conductors as recommended by BS7671
1. 0.25 ohms
2. 0.5 ohms
3. 1 ohm
4. 0.05 ohms
identify the information you should have available before the inspection and test of a new installation
1. external loop impedance
2. r1+r2 circuit values
3. total fault loop impedance
4. RCD disconnection times
identify the most appropriate method to ensure a circuit is safe to start work on
1. use a GS38 voltage indicating device
2. switch off the circuit MCB
3. open the main switch
4. safe isolation procedure
an 'Electrical Installation Condition Report' is completed for which one of the following
1. new electrical installation
2. fully refurbished property
3. existing electrical installation
4. replacement distribution board
identify the appropriate sense used to detect an overloaded socket outlet
1. sight
2. taste
3. hearing
4. touch
the 'rule of thumb' for 3-phase Ipsc states that it will be approximately
1. twice the value of the single-phase value
2. three times the value of the single-phase value
3. 66% of the single-phase value
4. 1/3rd of the single-phase value
the combination of Earth Electrode resistance and the rating of the RCD should not exceed which voltage when concerning a Construction site
1. 230v AC
2. 50v AC
3. 25v AC
4. 110v AC
identify the disconnection time requirement for a BS61009 RCBO rated at 30mA when tested at x1
1. within 400mS
2. within 100mS
3. within 200mS
4. within 300mS
identify the test voltage for Insulation Resistance for a 400v AC 3-phase circuit
1. 250v
2. 500v
3. 750v
4. 1000v
identify the maximum disconnection time requirement for a 'time-dalayed' BS61009 RCBO rated at 30mA
1. 40mS
2. 200mS
3. 500mS
4. 300mS
identify the IP requirement for the sides of a circuit distribution board
1. IP4x
2. IPx4
3. IP2x
4. IPx2
a radial circuit is 24m long and installed with 4.0 mmsq single-core conductors. The Ze for the installation is 0.44 ohms. The On Site Guide gives a Resistivity value of 4.61m Ohms/metre for a 4.0 mmsq conductor at 20 degrees C. Calculate the Zs value for the circuit
1. 0.48 ohms
2. 0.5 ohms
3. 0.66 ohms
4. 0.72 ohms
identify the location to take a correct reading for Total Earth Fault Loop Impedance
1. at the beginning of the circuit
2. at the remote part of the circuit
3. at the mid-point in the circuit
4. at the origin of the circuit
if the cross-sectional area (c.s.a) of a conductor decreases and its length remains the same, its resistance will
1. increase
2. decrease
3. remain the same
4. reduce to zero
carrying out a Total Earth fault Loop Impedance test on an A1 Ring circuit can be best accomplished with the availability of
1. a BS1363 accessory
2. the previous test results
3. a set of shorting leads
4. a 'wander lead'
when measuring Total Earth Fault Loop Impedance on live circuit, results can quickly be verified by comparing results with...
1. values in BS7671 regulations book tables
2. values in previous schedule of test results
3. values in BS7671 On Site Guide tables
4. values provided by the installation designer
identify the easiest method of determining correct Polarity on an A1 Ring circuit
1. during (r2) continuity test
2. during dedicated polarity test
3. during continuity of ring test
4. during total earth fault loop impedance test
identify the easiest method of determining correct Polarity on a lighting circuit
1. during (r2) continuity test
2. during dedicated polarity test
3. during continuity of ring test
4. during total earth fault loop impedance test
identify the test used to determine that 'every protective device and single pole switch is connected in the Line conductor'
1. insulation resistance
2. loop impedance
3. continuity
4. polarity
identify the appropriate human sense to detect overheating windings in a 230v motor
1. hearing
2. smell
3. taste
4. sight
protective devices for installed circuit must have a maximum breaking capacity of at least
1. 10kA
2. twice the circuit rating
3. the max Ipsc for the circuit
4. 1kA
identify the test voltage for Insulation Resistance test on a SELV circuit
1. 250v
2. 500v
3. 230v
4. 1000v
identify the test voltage for Insulation Resistance test on a 230v AC circuit
1. 250v
2. 500v
3. 400v
4. 1000v
identity the consequence of leaving lighting loads connected during an Insulation Resistance test
1. damage to the test instrument
2. possible circuit damage
3. false test readings
4. electric shock risk
identify the main purpose of conducting a Continuity of Ring Final Circuits test with a low-ohms tester
1. to provide accurate results
2. to prove the integrity of the circuit
3. to ensure sufficient range of results
4. to ensure it is safe to use
if the cross-sectional area (c.s.a) of a conductor increases and its length remains the same, its resistance will
1. decrease
2. remain the same
3. increase
4. settle at zero
if the cross-sectional area (c.s.a) of a conductor remains the same but its length reduces, its resistance will
1. increase
2. decrease
3. remain the same
4. reduce to zero
if the cross-sectional area (c.s.a) of a conductor remains the same but its length increases, its resistance will
1. increase
2. decrease
3. remain the same
4. reduce to zero
identify the appropriate sense used to detect a loose live electrical connection
1. sight
2. taste
3. hearing
4. touch
The EaW 1989 (Electricity at Work regulations) has some regulations that are reasonable practicable and others that are absolute. identify the meaning of the 'reasonably practicable' requirements
1. the specific regulation is correct
2. the specific regulation must be met
3. the specific regulation must be met within a certain time
4. the specific regulation should be actioned if it can
an A1 Ring continuity test shows 0.6 ohms (end-to-end) for Line and neutral conductors with c.p.c (end-to-end) showing 1 ohm. Identify the expected reading between Line and neutral at each socket outlet on the Ring.
1. 1.6 ohms
2. 0.4 ohms
3. 0.3 ohms
4. 1.2 ohms
identify the disconnection time requirement for a BS61009 RCBO rated at 30mA when tested at x0.5
1. within 150mS
2. should not disconnect
3. within 40mS
4. within 300mS
identify the IP requirement for the top surface of a circuit distribution board
1. IPx2
2. IPx4
3. IP2x
4. IP4x
when conducting a Ze test, the installation main Earthing conductor should be
1. left connected
2. connected to an earth electrode
3. disconnected
4. connected to all bonding
an installation Fault Current test shows Ipfc = 1.8kA and Ipscc = 2.1kA. What is recorded on the test document
1. the sum of both readings
2. the lowest reading
3. the highest reading
4. the average of the two readings
when carrying out RCD testing it is a requirement to operate the test button. Identify the purpose of this specific requirement
1. to verify the mechanical operation
2. to verify the RCD sensitivity
3. to verify its automatic disconnection
4. to ensure the circuit is isolated
before carrying out 'live' testing of an installation, you must
1. isolate the mains supply at the origin
2. remove all protective devices
3. inform other people who are in the area
4. remove all accessory covers
when conducting Insulation Resistance testing of an intermediate lighting circuit, it is important to
1. ensure all switches are in the ON position
2. operate all switches during the test
3. link out the switches with a shorting lead
4. set the switches to the off position
before conducting an Insulation Resistance test it is important to
1. link Line and c.p.c in the fuse board
2. remove any sensitive electronic loads from the circuit
3. disconnect the c.p.c from the circuit
4. ensure loads are installed
BS7671 states that the minimum Insulation Resistance value for a 230v AC circuit must be no less than
1. 2M ohms
2. 1M ohms
3. 0.5M ohm
4. 200M ohm
BS7671 regulations book details 'calculated' Zs values in tables. As a rule of thumb, 'measured' values of Zs should be
1. no higher than calculated values
2. 80% of calculated values
3. higher than calculated values
4. the same
an A1 Ring continuity test shows 0.5 ohms (end-to-end) for each Line and neutral conductor and the c.p.c (end-to-end) recorded at 0.84 ohms. Identify the expected (r1+r2) reading between Line and c.p.c at each socket outlet on the Ring.
1. 1.34 ohms
2. 0.4 ohms
3. 0.34 ohms
4. 0.62 ohms
'wire of solid objects greater than 1mm in diameter' have the IP code of
1. IPx2
2. IPx4
3. IP4x
4. IP2x
The EaW 1989 (Electricity at Work regulations) has some regulations that are reasonable practicable and others that are absolute. identify the meaning of the 'absolute' requirements
1. the specific regulation is correct
2. the specific regulation must be met
3. the specific regulation is non statutory
4. the specific regulation meets BS7671
a completed Electrical Installation certificate will identify the responsibility for
1. the materials and construction methods used
2. the design, environmental conditions and inspection and testing
3. the design, construction and inspection and testing
4. the installation, ownership and construction
a completed Electrical Installation Certificate will only be signed by
1. the local council authority
2. someone with a part 'P' qualification
3. the installation designer
4. a competent person
an extra lighting point is installed as part of an existing electrical installation. When completed identify which one of the following should be issued
1. electrical installation certificate
2. electrical installation condition report
3. periodic inspection report
4. minor works certificate
when a Minor Works certificate is to be issues for a modified circuit. Identify which one of the following details regarding the protective device should be recorded on the certificate
1. device BS(EN) number and rating
2. device rating and disconnection time
3. device manufacturer and Ipscc
4. device Ipscc and disconnection time
from the following selections, identify the information you should have available to you prior to starting the Inspection and Testing of a new installation
1. the maximum demand per phase
2. the polarity information of the supply
3. the name of the Regional Electricity Company (REC)
4. the name of the customer
an existing installation on a TN-C-S system of Earthing has 6 circuit protected by BS3036 protective devices and a measured Ze value of 0.08 ohms. Identify the reason why this could be potentially dangerous
1. the BS3036 devices are not permitted on TN-C-S systems
2. the resultant Ipfc may be too high for adequate circuit protection
3. Any fault current is likely to be too low
4. the maximum limit is 4 circuits

Initial verification, periodic and minor works - Inspection and Testing mock test (closed book)

Inspection and Testing to BS7671:2018 Amendment 2:2022 - (closed-book - no regs book allowed) - 20 questions from a large bank of questions