1
During initial verification the three conditions which must be verified as stated in BS7671
are
(A)
Polarity, R1 + R2 and all materials compliant with BS
(B)
Environment, utilization and construction
(C)
Installed equipment is of the correct type and complies with appropriate BS. (not BS 7671),All
of the fixed installation has been correctly selected and erected and it is not visibly damaged or
defective
(D)
Installed equipment works correctly, all circuits are RCD protected and all equipment installed
in zone 1 of a bathroom is to IP4X
2
The title given in law to the person carrying out periodic inspections is
(A)
(B)
(C)
(D)
3
The electricity at work regulations state that persons carrying out electrical work must
(A)
Wear glasses
(B)
Be supervised
(C)
Be insured
(D)
Be competent
4
State one supply parameter which may be measured or obtained from the DNO
(A)
Frequency
(B)
Voltage
(C)
Ipf
(D)
I∆n
5
State two supply parameters which can only be obtained by enquiry to the DNO
(A)
Ipf , PFC
(B)
Voltage, Frequency
(C)
Zs, Maximum demand
(D)
Voltage, PFC
6
The purpose of initial verification as identified in guidance note 3 is to ensure that
(A)
All installed equipment works
(B)
The installation has been designed and constructed to comply with BS7671
(C)
That the installation has been correctly tested
(D)
The installation complies with the customers requirements
7
The resistance of a single conductor is 0.7O. If the length is doubled and the c.s.a is
doubled the effect on the resistance will be
(A)
It is doubled
(B)
It is halved
(C)
It remains the same
(D)
It increases
8
When a test on a cable is carried out using a low resistance ohmmeter the value provided
by the instrument will be in
(A)
kA
(B)
mΩ
(C)
MΩ
(D)
Ω
9
The test voltage required for an insulation test carried out to prove electrical separation
between a SELV circuit and a low voltage circuit is
(A)
500v d.c.
(B)
25v d.c.
(C)
250v d.c.
(D)
50v d.c.
10
An insulation resistance test of an electrical installation formed of five circuits produces the
following results 100MΩ, 80MΩ, 25MΩ, 70MΩ and 20MΩ. The insulation resistance
value expected if the test was carried out at the meter tails would be
(A)
0.126Ω
(B)
7.88mΩ
(C)
7.88MΩ
(D)
0.126MΩ
(C)
7.88MΩ
11
An insulation resistance test is to be carried out on a circuit which contains a socket outlet
with surge protection, the maximum test voltage is
(A)
500v d.c.
(B)
230v d.c.
(C)
250v d.c.
(D)
50v d.c.
(C)
250v d.c.
12
Additional protection will be required for
(A)
Circuits which cannot meet the required disconnection time
(B)
A lighting circuit in a room containing a bath or a shower
(C)
Installations where there is no protective bonding
(D)
Circuits supplied by a TT system
(B)
A lighting circuit in a room containing a bath or a shower
13
The earth fault return path for a TT system is
(A)
The general mass of earth
(B)
The earthing conductor and the general mass of earth
(C)
The protective bonding conductor, the mass of earth and the earthing conductor
(D)
The earthing conductor, the earth electrode and the general mass of earth
(D)
The earthing conductor, the earth electrode and the general mass of earth
14
The maximum tabulated Zs for a protective device as shown in BS 7671 is 1.44Ω, the
maximum permissible measured Zs will be
(A)
1.44Ω
(B)
1.43Ω
(C)
1.15Ω
(D)
1.08Ω
(C)
1.15Ω
15
The prospective fault current for an installation is to be measured at the origin of a
polyphase installation, the highest measured value is likely to be between
(A)
L1 – E
(B)
L1 – N
(C)
L3 – N
(D)
L1 – L2
16
One point of a 3 phase installation where phase rotation must be checked
(A)
Each consumers unit
(B)
Each distribution board
(C)
The origin of the installation
(D)
The terminals of an electric motor
17
The type of inspection during which voltage drop should be verified
(A)
Initial verification
(B)
Periodic inspection
(C)
Visual
(D)
Formal
18
The type of instrument which can be used to check phase sequence is
(A)
An approved voltage indicato
(B)
An earth fault loop resistance tester
(C)
A rotating disc type
(D)
A multi meter
19
One condition that must be checked when confirming polarity is
(A)
Correct IP ratings
(B)
Double pole switches are used to switch all line conductors
(C)
The thread of an ES lamp holder is not connected to the neutral
(D)
Correct connection of equipment
20
Determine the voltage drop for a circuit with a combined L-N resistance of 0.43Ω at 20
deg C and a load current of 20A
(A)
5v
(B)
8.6v
(C)
10.32v
(D)
4.65v
(C)
10.32v