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.
Before using a multifunction test instrument, what is the MOST important thing should you check for?
2.
Which of the following is NOT a scale commonly found on an RCD tester?
3.
If equipment plugged into a socket outlet is not working, which of the following is the likely cause if the protective device hasn't tripped?
4.
The safest and most convenient way of proving the reliability of a voltage indicating device is?
5.
It is recommended that test instruments are nulled to?
6.
If an RCD has tripped due to a fault, which test would be most suitable to verify the fault?
7.
An insulation resistance test is performed on a standard final circuit, what should the instrument be set to measure in?
8.
Which of the following is likely to cause a transient voltage spike?
9.
Which test is the most logical test to be carried out, to verify a short circuit?
10.
Which device will protect circuits and equipment from transient voltages?
11.
Failure to get a reading of polarity using test method one could indicate?
12.
The insulation resistance test voltage for a SELV installation is?
13.
Which of the following is not a requirement of test probes and leads according to GS38?
14.
To maintain accurate readings, an instrument should?
15.
A polarity test is conducted to verify that?
16.
Which of the following would be the most likely cause of the final light in a lighting circuit not working, when the other lights do
17.
Which of the following would cause insufficient voltage supplying a light circuit?
18.
Which of the following could be the most likely factor that could affect rectifying a fault?
19.
Which of the following would cause a loss of supply to an installation?
20.
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?
21.
Which of the following would an inspector check, for a suspected voltage drop within a circuit?
22.
The insulation resistance test voltage for a 230v installation is?
23.
Once a short circuit fault has been diagnosed and rectified, what is the next step in regards to testing?
24.
Which logical stage should be carried out first, before carrying out fault diagnosis?
25.
The procedure for proving dead should be by use of a proprietary test lamp or two pole voltage detecting device as recommended by?
26.
If 2 different sized cables were connected together in parallel and measured using a low resistance ohmmeter, the overall resistance will
27.
Which of the following will be most useful for fault finding diagnostics?
28.
Which is likely to be the first source to help with fault diagnostics?
29.
A faulty lighting 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 1.54Ω and the R2 was measured as 1.98Ω. What would the Zs expected to be?
30.
If three conductors equal in length and with a resistance of 0.15Ω each are connected in series, what is the total resistance?
By Neil