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.
If two bonding conductors or equal length were connected in parallel, the resistance would?
2.
Which of the following is the most likely of implications caused from fault diagnostics?
3.
Which of the following would cause insufficient voltage supplying a light circuit?
4.
If a copper conductor was halved in length, the resistance would?
5.
Which of the following would NOT be acceptable for performing an insulation resistance test?
6.
When should an RCD trip, if the setting of half the rating of the RCD is used
7.
Which test is the most logical test to be carried out, to verify an open circuit?
8.
Which of the following could be the most likely factor that could affect rectifying a fault?
9.
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?
10.
A test instrument has a calibration date that has passed, what should be your course of action?
11.
The insulation resistance test voltage for a SELV installation is?
12.
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?
13.
If the temperature of a conductor decreases, the resistance?
14.
Once a short circuit fault has been diagnosed and rectified, what is the next step in regards to testing?
15.
When are GS38 leads required?
16.
An insulation resistance test is performed on a standard final circuit, what should the instrument be set to measure in?
17.
If a two way switch is not always able to operate lights when it is in the correct position, what is the most likely cause?
18.
The insulation resistance test voltage for a 230v installation is?
19.
If 2 cables are connected together in series and measured the overall resistance will?
20.
Which logical stage should be carried out first, before carrying out fault diagnosis?
21.
Which of the following would most likely cause a motor to not work, if the circuit is healthy?
22.
What is the importance of verifying readings obtained with those listed within BS7671 and associated documents?
23.
The non-statutory document detailing the care and use of tests instruments, leads and probes is?
24.
The item shown in the photo serves what purpose?
25.
Before using a multifunction test instrument, what is the MOST important thing should you check for?
26.
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
27.
Which of the following should happen in the handover process after fault diagnostics?
28.
Which of the following could cause an SPD to operate?
29.
Which of the following would cause a loss of supply to an installation
30.
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?
By Neil