When a certificate is issued for Initial Verification purposes, for the certificate to be valid it MUST be accompanied by?
test results sheet
inspection tick-sheet
schedules of inspections and test results
Part 'P' certificate
When the installation of a new circuit to an existing installation has been completed, the inspector will issue?
an initial verification certificate
a minor-works certificate
a condition report
a schedule of the tests completed
An electrical installation certificate for a new installation will require THREE signatories, Identify one of these signatories.
the owner
the site manager
the designer
the local authority
An electrical installation certificate for a new installation will require THREE signatories, Identify one of these signatories.
the owner
the clerk-of-works
the constructor
the local council
An electrical installation certificate for a new installation will require THREE signatories, Identify one of these signatories.
the customer
the clerk-of-works
the inspector/tester
building control
Which of the human senses would be used to determine that a BS3036 device has operated?
touch
smell
sight
hearing
Which (preferred) human sense would be used to determine that a flex is being exposed to over-current?
sight
smell
touch
hearing
Which (preferred) human sense would be used to determine that an item of sealed equipment under test is arcing internally whilst energised'?
taste
touch
sight
hearing
identify the indication to be used on an Initial Verification Schedule of Inspection form to indicate that an item meets the requirements of BS7671
a cross (x)
a tick
N/A
Lim
identify the indication to be used on an Initial Verification Schedule of Inspection form to indicate that an item is not applicable for this particular installation
a cross (x)
a tick
N/A
Lim
An electrical installation is afforded 'short-circuit protection' by the use of ADS. When inspecting this method of protection, which one of the following checks is not applicable?
bonding conductor continuity
Zs test
continuity of c.p.c's
inspection of fire barriers
Supplementary bonding conductors that are protected against mechanical damage shall have a CSA no smaller than?
10 sqmm
6 sqmm
4 sqmm
2.5 sqmm
Supplementary bonding conductors that are not protected against mechanical damage shall have a CSA no smaller than?
10 sqmm
6 sqmm
2.5 sqmm
4 sqmm
State the effect of running a separate copper conductor connected at each end in parallel with the steel-wire-armour of a SWA, for its entire length.
overall (R1+R2) value for the circuit would increase
overall (R1+R2) value for the circuit would decrease
disconnection times would increase
there would be no effect
State the effect of re-siting a consumers unit (CCU) further away from the mains intake position.
The Ze value measured at the CCU would increase
The volts-drop at the CCU would remain constant
Volts-drop at the CCU would decrease
Prospective Fault current at the CCU would increase
In a location containing a bath, identify the position of Zone 0?
in the bathtub
0.6m from the bathtub
immediately above the bathtub
3m or beyond
Identify the non-statutory document that details the construction and safe use of electrical test instruments and equipment.
Electricity at Work regulations
BS7671 On-site guide
HSE guidance note GS38
Electrical Regulations book
State the overall effect on Insulation Resistance if twice as many circuits are added to an existing consumers unit (CCU).
Insulation Resistance would increase
Insulation Resistance would decrease
Insulation Resistance would remain the same
Insulation Resistance would be be 200M Ohms
Before carrying out an Insulation Test at an occupied premises, which one of the following actions would be required to ensure safety?
inform 'building control' prior to testing
inform all persons present and erect warning signs
tell the client what's happening
keep all access points to the building locked
Identify the result below that would indicate that a SELV circuit has passed an Insulation Resistance test.
minimum 0.25 M ohms at 500v dc
minimum 0.5 M ohms at 250v dc
minimum 1 M ohms at 250v dc
minimum 0.5 M ohms at 500v dc
Identify the result below that would indicate that a 230v ac circuit has passed an Insulation Resistance test.
minimum 1 M ohms at 500v dc
minimum 0.5 M ohms at 250v dc
minimum 0.25 M ohms at 250v dc
minimum 2 M ohms at 500v dc
In an installation where more than one RCD device has been installed in series, to endure that the correct downstream device operates during a fault, there must be ....... between devices (identify the missing term).
determination
discrimination
disassociation
dissertation
A test for the prospective short-circuit current is measured at the mains intake position to ensure that...
the main protective device is rated at a value higher than the measured value
any fault current is sufficient to disconnect the mcb's in 0.4s or quicker
it does not exceed 6kA
circuit currents are not too high
Continuity of protective conductors (R2) tests are carried out using
an insulation resistance tester
a continuity tester
a low ohms meter
a volt meter
if two conductors, both with a resistance of 1 ohm each are connected together in parallel, calculate the total resistance.
2 ohms
1 ohm
0.5 ohms
3 ohms
On a continuity of ring circuit conductors test, state the purpose of taking test readings at socket outlets once the incoming and outgoing lines and cpcs have been cross-linked in the CCU.
to record the (R1+R2) value
to prove the circuit is a ring
to ensure that the live is continuous
to ensure the cpc is continuous
Identify the unit of measure for an insulation test
m ohms
M ohms
ohms
k ohms
A circuit has a 32A type 'B' circuit breaker which has a maximum tabulated value of 1.37 ohms. State the maximum measured value of Zs allowed for this circuit.
1.10 ohms
1.44 ohms
0.72 ohms
1 ohm
An A1 ring circuit records open-end continuity of 0.8 ohms (L) and 1.3 ohms (cpc), calculate the expected value of (R1+R2) for that ring circuit.
0.53 ohms
2.1 ohms
1.63 ohms
13.85 ohms
Before carrying out an Insulation Resistance test on a lighting circuit, is is essential to...
link the line and cpc in the CCU
remove all loads from the circuit
disconnect the earthing conductor
ensure all light switches are in the off position
State the maximum test current applied to a 30mA RCD - used for additional protection.
30mA
100mA
150mA
15mA
State the maximum test current that would be applied to a 100mA RCD during RCD testing.
100mA
150mA
30mA
15mA
Where is a live polarity check carried out to verify that the supply to an installation is correct?
at the mains intake position
at the end of any installed circuit
at the end of every circuit
at any socket outlet
The current measured at the mains intake position of an installation would be recorded on test documentation as the?
design current
prospective fault current
tabulated current
protective device current
An installed circuit has a Zs value of 0.84 ohms. If Ze = 0.04 ohms, calculate the value of (R1+R2)
0.8 ohms
0.88 ohms
0.34 ohms
2.1 ohms
An installed circuit has a Zs value of 0.84 ohms. If (R1+R2) = 0.5 ohms, calculate the value of Ze
1.34 ohms
1.68 ohms
0.34 ohms
2.2 ohms
A circuit has a supply voltage between L and E = 230v at 50Hz AC, an (R1+R2) value = 0.24 ohms and a Ze value = 0.8 ohms. Calculate the Ipscc value for the circuit.
221A
230.8A
3.48 mA
288A
Identify the unit of measure used on an RCD tester?
M ohms
milli ohms
mS
low ohms
Identify the unit of measure for a PFC instrument?
kA
mA
mS
M ohms
Identify the type of instrument that would be used to measure leakage current in a circuit.
voltmeter
clamp meter
Ipscc tester
EFLI tester
A circuit has a supply voltage between L and E = 230v at 50Hz AC, an (R1+R2) value = 0.24 ohms and a Zs value = 0.8 ohms. Calculate the Ipscc value that would be recorded at the installation mains-intake position.
411A
230.8A
3.48 mA
229A
Identify the correct document to be completed when an additional socket has been added to an A1 ring circuit
Electrical Installation Condition report
schedule of test results sheet
minor electrical installation works certificate
Electrical Installation Certificate
Identify which item of information is NOT included on a Minor Electrical Installation Works Certificate