Test our knowledge

[dichroic]

1.) How is a earth connected in a transformer, to get 55V to earth in fault conditions
a.) To the star point of the primary winding
b.) To the star point of the secondary winding
c.) To the centre between the winding
d) To the star point of the primary & secondary winding


2.) A mandatory sign has a white picture on a blue background. What is the shape or it
a.) Triangle
b.) Rectangle
c.) Circle
d) Oval

3.) What is the purpose of a choke in a fluorescent fitting
a.) To improve power factor and efficiency
b.) To start at high voltage and improve efficiency
c.) To start at high voltage and limit current
d) To start at high current and limit the voltage

4) A 1kW load is connected to a 230V supply at a power factor of 0.6 the supply current will be
a) 4.34A
b)7.24A
c) 230A
d) 1000A

5) The correct formula associated with power factor is
a) P = VI Cos Ø
b) P = VI S
c) P = V Cos Ø
d) P = I Sin Ø

 

[Spudnik]

Did you want answers or are you testing us?

 

[dichroic]

I have the answers i just thought it would be a little light relief.

Dichroic

 

[Guest123]

1.C
2.B
3.C
4.B
5.A

How sad am I.

 

[SirKit Breaker]

?

 

[Guest123]

Thought I'd humour him.

 

[DiscoDave]

four out of five, it's a long time since i've had owt to do with calculations! maybe not a good thing!

 

[pushrod]

Sounds like willy waving to me - have lectures finished

 

[Scott F]

Sounds like willy waving to me - have lectures finished

Push rod I have never heard of this custom tell me more

 

[dichroic]

Sounds like willy waving to me - have lectures finished

Willy waving ???

Is that a City and Guilds qualification ??

 

[JUD]

Sounds like willy waving to me - have lectures finished

Excellent

I'll have to remember that one