2391 questions

1)
indicate three main items for for which you would require relevant information about in order to undertakean initial inspection on a new installation

2)
state releveant documentation that relate to the inspection and test of a system name on statutory and two non statutory

3)
an electrical installation certificate and a periodic inspection report should be accompanied by two other documents what are they?

4)
state three areas of inspection you would check when carrying out a periodic inspection report

5)
state three human senses used when carrying out periodic inspection report

6)
list the instruments which provide the measurements 20 megohms , 8KA and 22mS

7)
insulation resistance testing requires different test voltages for certain circuits, identify what circuits require the following voltages 250v, 500v, 1000v.

8)
state the first three tests that should be taken during the initial verification of a new installation.

9)
the test for continuity of the CPC in a radial circuit with one socket requires a link and a milli-ohmmetrer state: were link is connected, state where meter is connected, what the meter reading represents.

10)
state three different protective conductors that need to be connected to the main earth terminal

11)
the following results were obtained during the initial test on a healthy ring circuit
what readings would you expect after cross connection between line and neutral at each socket , between line and cpc at each socket, what does the line and cpc represent ?


12)
state the effect on conductor resistance when cable length increases
conductor resistance when CSA increases

13)
state three precautions to be taken before an insulation resistance test on a circuit

14)
an inclosure has been fabricated on site state the IP rating , it is not affected by liquids

15)
state the protection offered by the following IP ratings IP4X, IPX8, IPXXB

16)
state three reasons for conducting polarity checks on a circuit

17)
ID earthing system that is connected with overhead cables, a multi core supply cable with seperate earth and neutrel, supply in which earth and neutrel are performed in one conductor

18)
state three locations where additinal requirements for an electrical installation are needed

19)
from the formula Zs = Ze +(R1 + R2) x 1.2 x L / 1000 state what is Ze, R2 and 1.2

20)
state three functonal test to be carried out on an installation


this page is still in progress more questions with answers to follow shortly, in the meantime you might want to check out the following links for some useful revision books covering 2391 exam success and 2382 17th edition exam success, thanks for taking the time to visit my page, and i hope you found it useful, please share your thoughts by leaving a comment below, many thanks




Guidance Note 3: Inspection & Testing