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 2 different sized cables were connected together in parallel and measured using a low resistance ohmmeter, the overall resistance will
2.
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?
3.
Which of the following faults, would likely cause a burning smell?
4.
The procedure for proving dead should be by use of a proprietary test lamp or two pole voltage detecting device as recommended by?
5.
Which of the following would an inspector check, for a suspected voltage drop within a circuit?
6.
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?
7.
To maintain accurate readings, an instrument should?
8.
Which test is the most logical test to be carried out, to verify a cross connection?
9.
It is recommended that test instruments are nulled to?
10.
A test instrument has a calibration date that has passed, what should be your course of action?
11.
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?
12.
When should an RCD trip, if the setting of half the rating of the RCD is used
13.
Which is the correct method of disposing of Asbestos?
14.
Which test is the most accurate to test the sensitivity of an RCD?
15.
Which of the following is likely to cause a transient voltage spike?
16.
Before beginning fault finding on a domestic property, what should you do?
17.
If an RCD has tripped due to a fault, which test would be most suitable to verify the fault?
18.
Which is the correct method of disposing of plasterboard on site?
19.
If a copper busbar is drawing a current of 300A, what will be the physical effect on the actual busbar?
20.
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?
21.
If an MCB is able to reset after a small duration of time after it has been operated, what is the likely cause?
22.
The most serious result of basic contact with a live conductor would be?
23.
Which logical stage should be carried out first, before carrying out fault diagnosis?
24.
A low reading ohmmeter used to perform a continuity of protective conductor test, should record results in?
25.
Which test is the most logical test to be carried out, to verify an open circuit?
26.
A polarity test is conducted to verify that?
27.
An intrinsically safe test instrument would be used in?
28.
Which is one of the main hazards of an old building with insulated pipes coming from old boilers?
29.
Which of the following should happen in the handover process after fault diagnostics?
30.
Which of the following would most likely cause a motor to not work, if the circuit is healthy?
By Neil