help

[pompeychris]

HI there doing a new careers course on being a domestic electrical installer and got stuck on a question so wondering if any of you guys could give me a hand?

Which of the following is not an advantage of using a MCB instead of a rewirable fuse?

a)Visual indication of failure

b)Rapid reseting of the device

c)can be locked for isolation

d)needs an electrican to reset

any ideas help thanks

 

[ipf]

I'll have to think about that one :detective:

 

[telectrix]

the one they ain't given in the answer. it can't be replaced with a nail:76:

 

[Richard Burns]

You need to think about this one a little and decide which answer is patently incorrect.
Is there an immediate visual indication of failure with and MCB and not with a rewirable?
Can you reset and MCB faster than rewiring a rewirable?
Can an MCB be locked for isolation where a rewirable cannot?
Does an MCB need an electrician to reset it where a rewirable does not need an electrician?

The answer should be clear cut.

 

[philpot101]

Hi, Be very careful of doing a NCS course they do not teach you anything about the real world they just teach you about how to pass the exams,I have done a NCS course near Southampton and once I had passed found it very hard for anybody to take you seriously about getting work because I had no experience in the trade.

 

[hercule]

wind up?

 

[Guest112]

must be a wind up mate, if its not im changing my trade i hate whats becoming of our trade

 

[1shortcircuit]

Hi, Be very careful of doing a NCS course they do not teach you anything about the real world they just teach you about how to pass the exams,I have done a NCS course near Southampton and once I had passed found it very hard for anybody to take you seriously about getting work because I had no experience in the trade.

Ah, so you went into the centre believing that you were going to come out a fully qualified spark earning 50-70k a year lol

I did the same course and I am currently bringing in my own work but that may have something to do with the fact that I chose to gain experience along the way. Yes I'll admit I was lucky to find someone who gave me the opportunity but better to start early than get to the end and then try and get someone to take you on

:thumbsup

 

[1shortcircuit]

wind up?

Nope, definitely one of the questions in a Module.

Chris, some of the questions you have to sit back and think about how they've worded it. They're not trick questions, they're just written in a way that you wouldn't ask it:thumbsup

 

[Spudnik]

C&G do my head in with the way they ask questions.

I mean, whats the point in making them so hard to understand?

 

[Guest112]

i agree the way they word the questions is ridiculous

 

[GLENNSPARK]

but come on guys.....mull it over for a minute......i think its clear....

 

[i=p/u]

what about this one, a relay coil induces a magnetic flux of 200u (wb) in its laminated core of 150mm squared, establish magnetic flux?????

 

[1shortcircuit]

but come on guys.....mull it over for a minute......i think its clear....

Most definitely but you know how it is when you've been sat there trying to concentrate for a couple of hours, kids running riot, neighbour DIYing and Water Board digging up the street - The simplest of questions to read turns out to baffle beyond belief lol

I used to leave them, answer the ones I knew the answers to, grab a coffee and a breather and then have another look. If still no joy then I'd put the folder away and have a look the next day or a few days after that

 

[GLENNSPARK]

Most definitely but you know how it is when you've been sat there trying to concentrate for a couple of hours, kids running riot, neighbour DIYing and Water Board digging up the street - The simplest of questions to read turns out to baffle beyond belief lol

I used to leave them, answer the ones I knew the answers to, grab a coffee and a breather and then have another look. If still no joy then I'd put the folder away and have a look the next day or a few days after that

a good strategy short.........and a good way to approach an exam such as the 2391.....city & guilds advise to start at the front and answer the 20 short answer questions first before taking on the 6 structured ones......you can do them in ANY order you choose......

 

[Richard Burns]

what about this one, a relay coil induces a magnetic flux of 200u (wb) in its laminated core of 150mm squared, establish magnetic flux?????

If the coil induces a magnetic flux of 200 micro Wb then the magnetic flux is 200 micro Wb!
The magnetic flux density is 1.33T