Welcome to your 2365 624 Inspection & testing
1.
An insulation resistance test shows a reading 0.00MΩ. What might the obvious problem be?
2.
An earth fault loop impedance test performed on a ring final circuit will record
3.
Which documentation would you sue for replacing a socket outlet one for one
4.
Test instruments should ideally be calibrated
5.
What is the formula for calculating earth fault loop impedance?
6.
Which Appendix in BS7671 contains the model forms for inspection and testing
7.
The maximum value of earth electrode resistance for a TT installation protected by a 30mA RCD by GN3 as
8.
Why is it important to test an installation in the correct sequence?
9.
If 3 conductors equal in length and with a resistance of 1.5Ω are connected in parallel, what is the total resistance?
10.
If the temperature of a conductor increases, the resistance?
11.
To maintain accurate readings, an instrument should
12.
When are GS38 leads required?
13.
Test probes to GS38 should amongst other considerations
14.
The reading in the picture was obtained during an insulation resistance test between phase and neutral. What might the result most likely mean?
15.
Three resistors of value 1.0Ω ; 1.2Ω; and 1.8Ω; are connected in series across a 24V supply. What is the total current drawn in the circuit?
16.
BS7671 gives guidance on the installation of electrical systems. Although it is not a statute document, it closely interprets
17.
One test that will commonly identify short circuits within an electrical installation is the
18.
The insulation resistance test voltage for a 400v installation is
19.
An intrinsically safe test instrument would be used in
20.
The practice of placing insulation tape over a switched circuit breaker during the safe isolation process contravenes which regulation?
21.
During a periodic inspection, protective conductors must not be disconnected if
22.
While working on a circuit, a colleague receives an electric shock. What action should you take?
23.
The Ze is to be measured as part of the initial verification process, what instrument should be used for this task?
24.
What Item of equipment should be used in conjunction with the item in the photo?
25.
When should an RCD trip when the setting of 5 times the rating of the RCD is used
26.
An insulation resistance test on a large installation gives unexpectedly low readings that are below the minimum expected values according to BS7671. What could be your course of action?
27.
The maximum value of earth electrode resistance for a TT installation protected by a 500mA RCD is given by GN3 as
28.
HSE Guidance Notes GS38 give particular guidance to
29.
The main risk of not carrying out the full safe isolation procedure when working on live circuits is
30.
Before using a multifunction test instrument, what is the MOST important thing should you check for?
31.
An RCD test should indicate a reading in
32.
A polarity test is performed on Edison screw lamp holders to?
33.
Which of the following IR test results would require a cable to be replaced on a low voltage circuit
34.
The safest, most convenient and most accurate method of determining the external fault loop impedance is by
35.
The statutory requirements for electrical systems can be found in
