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June 2011 2391 exam

R

Richard

Did any of you sit it? I didn't think it was TOO bad, couple of questions I was a little unsure of but overall ok. How did you guys find it? I can never think of the bloddy questions afterwards!
 
I might be wrong but dont you only need to do the 5 times test when you are testing a rcd/rcbo giving additional protection .so I delta N value of less than or equal to 30 ma ..

72-van

You're quite correct.
 
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Mate once you start doing Pat in the field its the other way around :) you 'll need something to be thinking about when your doing the Pat its mind numbingly boring repeatative and wholly unsatisfying .

One recommendation i would give anyone starting out -- get some good kneepads :)

If you need a help with the Pat stuff feel free to ask :)
I have just done the c&g after doing the work in the field for years.
Get a copy of the Cop if you dont already have it and memorise :)
Its a multiple choice exam ..what out for sneaky questions double negatives etc.
Loadsa questions which have absolutely no relevance in the field and precious little practical time on the testers.

72-van
 
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I have a copy of Thursday nights paper if somebody knows how i can add an attachment (PDF) to these threads? Not to clued up on computers unless its fairly straight forward.
 
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ok, no worries. I'll just reel off a few questions then and try to mark my own paper. Thought it was quite a straight forward paper compared to some practice papers.
 
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Q2.
An installation has
been seriously overloaded and requires investigation. State

b)
two
areas which require close inspection as a resuit of the overloading?

I answered Distribution board and Wiring. Don't know if wiring is acceptable terminology?
 
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Q5)
State three inspection checks that may be carried out on an armoured cable installation using the sense of touch?

Any answers?

Q11)
State the effect on measured values of insulation resisLance of a230 V circuit if an​
insulation resistance test is carried out

i) between live conductors to earth with a tungsten lamp in circuit

ii)between live conductors with a switched fused connection unit, having a
neon indicator. left in the off position.

Any answers?
 
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Q14) State the minimum degree of lP code protection to be afforded by the

a) front surface of a distribution board?......IP2X?

b) horizontal top surface of a motor starter which is accessible?......IP4X?

c) front surface of a conduit box contain ing live terminals?......IP2X?



Q16) State the test instrument to be used to carry out a resistance measurement of an earth electrode

a)that forms part of a TT system that ls protected by a 100'mA RCD? Earth fault loop impedance tester?

b)used to earth a three phase transformer? Earth fault loop impedance tester?

c)used to earth a generator? Earth eclectrode tester?
 
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