Welcome to your 2365 624 Inspection & testing
1.
Which of the following is the most suitable source of isolating a supply before beginning maintenance or testing?
2.
A Zs reading is to be entered on a minor works certificate, what is the correct instrument used to determine this reading?
3.
The insulation resistance test voltage for a 400v installation is
4.
The insulation resistance test voltage for a SELV installation is
5.
The correct scale for recording continuity of Ring Final Conductors is
6.
A measurement of R1+R2 on an installation installed entirely in steel trunking and galvanised conduit should be taken?
7.
Which of the following would NOT be acceptable for performing an insulation resistance test?
8.
The non-statutory document detailing the care and use of test instruments, leads and probes is
9.
The correct safe isolation procedure on a 3 phase circuit will result in a voltage indicator device being connected across terminals in how many different combinations to ensure it is adequately proved dead?
10.
BS7671 has a separate part designated solely to testing and inspection. The legal status of this document is that it is a
11.
An existing single phase installation in the middle of London has 12 circuits protected by BS3036 fuses. A periodic inspection shows its Ze measured at 0.09Ω. What is potentially dangerous about this reading?
12.
When are GS38 leads required?
13.
The insulation resistance test voltage for a 230v installation is
14.
The rule of thumb method recommended by GN3 for earth fault loop impedance is
15.
A SELV circuit should be insulated resistance tested
16.
Why is it important to keep records of test equipment, usually via serial numbers?
17.
The test designed to determine the correct connection of all the protective conductors within installation is known as the
18.
An intrinsically safe test instrument would be used in
19.
The safest and most convenient way of proving the reliability of a voltage indicating device is
20.
The reading in the picture was obtained during an insulation resistance test between phase and neutral. What might the result most likely mean?
21.
An RCD protected socket outlet to BS 7288 should operate when tested at 1I, within what time frame?
22.
Isolators are designed to operate under
23.
Where a circuit feeds a socket outlet that incorporates an SPD it is recommended to?
24.
When completing an EIC on a TNCS system which box should be ticked in the means of earthing section
25.
Which one of the following items is included in the checklist during the initial verification of an installation?
26.
Applying the rule of thumb method, the value of prospective short circuit current for a three phase supply should be
27.
The resistance of a bonding conductor will increase if
28.
The rule of thumb method recommended by Guidance Note 3 for earth fault loop impedance is
29.
What is the recommended duration for the next test of a domestic building
30.
The main reason for the cross connecting the conductors during the ring final circuit test and not just relying on end to end reading is?
31.
An insulation resistance test on a large industrial installation is carried out using
32.
Any overcurrent protective device installed at the origin of a circuit must have a breaking capacity of
33.
The scale indicated in the picture is used for what particular test?
34.
The maximum value of earth electrode resistance for a TT installation protected by a 30mA RCD by GN3 as
35.
The testing of the resistance of an earth electrode can be alternatively carried out with
By Alan Rogers