Welcome to your 2365 623 Fault Diagnosis
1.
Which of the following would NOT be acceptable for performing an insulation resistance test?
2.
A test instrument has a calibration date that has passed, what should be your course of action?
3.
The insulation resistance test voltage for a SELV installation is?
4.
Which of the IET Guidance Notes will be most useful for fault diagnostics?
5.
The minimum insulation resistance value for a SELV installation, according to BS7671 IET Wiring Regulations is?
6.
Which logical step would come first, when approaching fault diagnosis?
7.
If an RCD has tripped due to a fault, which test would be most suitable to verify the fault?
8.
It is recommended that test instruments are nulled to?
9.
If a copper conductor was halved in length, the resistance would?
10.
If 2 different sized cables were connected together in parallel and measured using a low resistance ohmmeter, the overall resistance will
11.
Which test is the most logical test to be carried out, to verify a short circuit?
12.
What is considered Low Voltage?
13.
If a copper busbar is drawing a current of 300A, what will be the physical effect on the actual busbar?
14.
Which of the following tests should be performed specifically on a three-phase circuit?
15.
What is the importance of verifying readings obtained with those listed within BS7671 and associated documents?
16.
The procedure for proving dead should be by use of a proprietary test lamp or two pole voltage detecting device as recommended by?
17.
Which of the following will be most useful for fault finding diagnostics?
18.
Which of the following would cause a loss of supply to an installation?
19.
Which test is the most logical test to be carried out, to verify a cross connection?
20.
Which of the following would cause insufficient voltage supplying a light circuit?
21.
When should an RCD trip, if the setting of 5 times the rating of the RCD is used?
22.
Failure to get a reading of polarity using test method one could indicate?
23.
Which of the following is not a requirement of test probes and leads according to GS38?
24.
Which of the following faults, would likely cause a burning smell?
25.
If an RCD has operated, which fault is most likely to cause this?
26.
If the temperature of a conductor decreases, the resistance?
27.
Which of the following would an inspector check, for a suspected voltage drop within a circuit?
28.
When should an RCD trip, if the setting of half the rating of the RCD is used
29.
An insulation resistance test is performed on a standard final circuit, what should the instrument be set to measure in?
30.
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?
By Neil