18th edition exam question..

pc1966 said:
That is also a big dodgy.

For a TN supply it is 5s sub-main or 0.4s for a final circuit. But the one you ticked was 0.4ms which is not feasible for a 50Hz supply!
Click to expand...
I chose 5 seconds, but the 'correct' answer is 0.4ms apparently...
 
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Electrician Forum | post electrician forum threads here
That livestock one is definitely wrong.
 
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I passed the exam today, only got 85% so got a handful of questions wrong. I have to admit, there were a few questions which evaded my knowledge and couldn't even find the answer in the BBB! Overall I'm happy though, considering I only booked the exam last week and purchased the BBB less than a week ago :-)
 
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