Wireman 2nd year mcq

Wireman – Semester 4 Module 2 – Generation and transmission

1 : Which principle the transformer works?
A : Self induction
B : Mutual induction
C : Fall of potential
D : Lenzs law

2 : Which is the colour of fresh silica gel?
A : Green
B : Blue
C : Grey
D : Yellow

3 : Which part act as protective device in transformer?
A : Conservator tank
B : Tap changer
C : Temperature gauge
D : Buchholz relay

4 : Which part reduces the heat of transformer core and winding?
A : Transformer oil
B : Breather
C : Cooling tubes
D : Conservator tank

5 : What is the name of transformer?

A : Audio frequency transformer
B : High frequency transformer
C : Poly phase transformer
D : Current transformer

6 : Which transformer, the secondary voltage is same as that of primary voltage?
A : Ignition transformer
B : Pulse transformer
C : Isolation transformer
D : Instrument transformer

7 : What is the name of transformer?
A : Ring type transformer
B : Core type transformer
C : Current transformer
D : Air core transformer

8 : What is the emf equation of transformer?
:

9 : Which is denoted by the letter qm in the formula 4.44 FNqm ?
A : Maximum flux
B : No of turns in primary
C : No of turns in secondary
D : Frequency

10 : What is the name of transformer if the transformation ratio (K) is more than 1?
A : Step down transformer
B : Unity ratio transformer
C : Step up transformer
D : Auto transformer