1
What is the status of the person who is carrying out an inspection and test
(A)
Duty holder
(B)
Electrician
(C)
Competent
(D)
Qualified
2
Which of the following documents is non statutory
(A)
(B)
(C)
(D)
3
The correct document required when an electrical installation has been overloaded is
(A)
An electrical installation certificate
(B)
A minor works certificate
(C)
An electrical installation condition report
(D)
A periodic inspection report
4
A periodic inspection need not be carried out when
(A)
It is too expensive
(B)
Regular documented maintenance is carried out
(C)
The due date has expired
(D)
The installation is more than 10 years old
5
A low resistance ohmmeter must produce a voltage of
(A)
50v
(B)
500v
(C)
2 – 24v
(D)
2 – 24mV
6
A test instrument which could be used to measure the resistance of an earth electrode is
(A)
A low resistance ohm meter
(B)
An earth fault loop impedance tester
(C)
A prospective short circuit current tester
(D)
An insulation resistance tester
7
Why is it important that the tests carried out during an initial verification carried out in the
correct order
(A)
To save time
(B)
To avoid excessive battery use
(C)
Safety
(D)
It is easy to remember
(C)
Safety
8
The calculation for circuit earth fault loop impedance is
(A)
Zs = Ze + R1 + R2
(B)
Ze = Zs – R1 + R2
(C)
Zs = Ze + R1 + Rn
(D)
Ze = Zs + R1 + R2
(A)
Zs = Ze + R1 + R2
9
A conductor which is 36 m long has a resistance of 7.41mΩ per meter calculate its end to
end resistance
(A)
0.26mΩ
(B)
2.66Ω
(C)
0.26Ω
(D)
2.66mΩ
(C)
0.26Ω
10
The circuits in an installation have an insulation resistance of 20MΩ, 34MΩ 18MΩ and 20MΩ
if the insulation resistance was measured from the meter tails the expected insulation
resistance would be
(A)
5.40MΩ
(B)
546MΩ
(C)
5.46Ω
(D)
5.46mΩ
(A)
5.40MΩ
(B)
An earth fault loop impedance tester
11
The test which must be carried out prior to the RCD test during a periodic inspection is
(A)
Push button test
(B)
Prospective short circuit current
(C)
Earth fault loop impedance
(D)
Insulation resistance
12
The tests currents required when testing a 300mA RCD are
(A)
150mA, 300mA and 1500mA
(B)
15mA, 30mA and 150mA
(C)
0.15A, 0.3A
(D)
0.015A 0.030A
(C)
0.15A, 0.3A
13
The first three tests required for an initial verification are
(A)
Polarity, Insulation resistance and earth fault loop
(B)
Continuity of protective conductors, polarity and insulation resistance
(C)
Ring final circuit test, insulation resistance and earth fault loop impedance
(D)
Continuity of protective conductors, ring final circuit test and insulation resistance
(D)
Continuity of protective conductors, ring final circuit test and insulation resistance
14
The maximum rating of an RCD used for fire protection is
(A)
300mA
(B)
Time delayed 300mA
(C)
Time delayed 30mA
(D)
500mA
(A)
15
The correct IP rating for equipment installed in Zone 2 of a bathroom is
(A)
IP4X
(B)
IPXXB
(C)
IPX4
(D)
IPX2
(C)
IPX4
16
The IP rating used to indicate finger protection is
(C)
Earth fault loop impedance
(A)
IP2X
(B)
IPXXB
(C)
IP4X
(D)
IPXXD
17
The current which should cause automatic disconnection of a 20a type B BS EN 60898
circuit breaker is
(A)
100A
(B)
200A
(C)
100mA
(D)
21A
(A)
18
The stated maximum Ze for a TN-S supply system is
(A)
0.35Ω
(B)
0.21Ω
(C)
0.8Ω
(D)
0.85Ω
(C)
0.8Ω
19
A TT system is normally an
(A)
Overhead supply
(B)
Underground supply
(C)
Generator supply
(D)
A top to tail supply
(A)
Overhead supply
20
Ipf is the symbol used for the value of
(A)
Current power factor
(B)
Current, power and frequency
(C)
Frequency of phase current
(D)
Prospective fault current
(D)
Prospective fault current
(B)
IPXXB