Welcome to your 2365 623 Fault Diagnosis
1.
Which of the following would cause insufficient voltage supplying a light circuit?
2.
Which of the IET Guidance Notes will be most useful for fault diagnostics?
3.
It is recommended that test instruments are nulled to?
4.
The safest and most convenient way of proving the reliability of a voltage indicating device is?
5.
Which of the following could cause an SPD to operate?
6.
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?
7.
Which of the following would an inspector check, for a suspected voltage drop within a circuit?
8.
Which test is the most logical test to be carried out, to verify a short circuit?
9.
During a continuity of Ring final conductors test, 10 Sockets give a R1+R2 reading of 0.68Ω, but one socket gives a reading of 0.92Ω. What might that indicate?
10.
Which of the following will be most useful for fault finding diagnostics?
11.
Which of the following would NOT be acceptable for performing an insulation resistance test?
12.
What is the importance of verifying readings obtained with those listed within BS7671 and associated documents?
13.
A test instrument has a calibration date that has passed, what should be your course of action?
14.
If a copper conductor was halved in length, the resistance would?
15.
One test that will commonly identify short circuits within an electrical installation is the?
16.
Which logical stage should be carried out first, before carrying out fault diagnosis?
17.
If two bonding conductors or equal length were connected in parallel, the resistance would?
18.
Which of the following would most likely cause a motor to not work, if the circuit is healthy?
19.
When are GS38 leads required?
20.
To maintain accurate readings, an instrument should?
21.
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?
22.
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
23.
An insulation resistance test is performed on a standard final circuit, what should the instrument be set to measure in?
24.
When should an RCD trip, if the setting of 5 times the rating of the RCD is used?
25.
Which of the following could be the most likely factor that could affect rectifying a fault?
26.
Which of the following tests should be performed specifically on a three-phase circuit?
27.
Which test is the most logical test to be carried out, to verify a cross connection?
28.
When are GS38 leads required?
29.
The insulation resistance test voltage for a 230v installation is?
30.
If an MCB has tripped due to a fault, which test would be most suitable to verify the fault?
By Neil