Welcome to your 2365 623 Fault Diagnosis. This mock exam is not a substitute for proper teaching or revision and should only be used as a resource to prepare learners for the exam. The questions (along with the wording and diagrams) contained within the bank of this exam are purely made up by our lecturers and not copied from any actual qualification exam. So while this is an excellent free revision resource, please do not rely on these exam questions alone to help you be successful within your qualifications. When you are ready, please press "start quiz".
1.
One test that will commonly identify short circuits within an electrical installation is the?
2.
If a copper busbar is drawing a current of 300A, what will be the physical effect on the actual busbar?
3.
Which of the following would NOT be acceptable for performing an insulation resistance test?
4.
Which test is the most accurate to test the sensitivity of an RCD?
5.
The procedure for proving dead should be by use of a proprietary test lamp or two pole voltage detecting device as recommended by?
6.
The most serious result of basic contact with a live conductor would be?
7.
If an RCD has operated, which fault is most likely to cause this?
8.
A low reading ohmmeter used to perform a continuity of protective conductor test, should record results in?
9.
If 2 different sized cables were connected together in parallel and measured using a low resistance ohmmeter, the overall resistance will
10.
A faulty heating circuit which was supplied from a 230V, 50Hz single phase supply and a recorded Ze of 0.8Ω. The resistance of R1 was measured at 1.34Ω and the R2 was measured as 1.86Ω. What would the Zs expected to be?
11.
To maintain accurate readings, an instrument should?
12.
If three conductors equal in length and with a resistance of 0.15Ω each are connected in series, what is the total resistance?
13.
Which is the correct method of disposing of plasterboard on site?
14.
When should an RCD trip, if the setting of half the rating of the RCD is used
15.
If a copper conductor was halved in length, the resistance would?
16.
Once a short circuit fault has been diagnosed and rectified, what is the next step in regards to testing?
17.
If an MCB is able to reset after a small duration of time after it has been operated, what is the likely cause?
18.
Which of the IET Guidance Notes will be most useful for fault diagnostics?
19.
During a continuity of Ring final conductors test in a domestic building, ten sockets give a R1+R2 reading of 0.5Ω, but an additional three sockets in the garage from the same circuit gives readings of 0.6Ω, 0.7Ω and 0.8Ω respectively. What might that indicate?
20.
Which of the following should happen in the handover process after fault diagnostics?
21.
Which of the following would cause a loss of supply to an installation?
22.
The insulation resistance test voltage for a 230v installation is?
23.
Which of the following is likely to cause a transient voltage spike
24.
An insulation resistance test is performed on a standard final circuit, what should the instrument be set to measure in?
25.
When should an RCD trip, if the setting of 5 times the rating of the RCD is used?
26.
When are GS38 leads required?
27.
Which of the following could be the most likely factor that could affect rectifying a fault?
28.
If 2 cables are connected together in series and measured the overall resistance will?
29.
Which of the following would an inspector check, for a suspected voltage drop within a circuit?
30.
Which of the following could cause an SPD to operate
By Neil