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1.
Spacers are provided between adjacent coils
2.
A shell-type transformer has
3.
In Ns is the synchronous speed and s the slip, then actual running speed of an induction motor will be
4.
Distribution transformers are generally designed for maximum efficiency around
5.
Power transformers are generally designed to have maximum efficiency around
6.
Which of the following statements regarding an idel single-phase transformer having a turn ratio of 1 : 2 and drawing a current of 10 A from 200 V A.C. supply is incorrect?
7.
The maximum efficiency of a distribution transformer is
8.
Which of the following protection is normally not provided on small distribution transformers?
9.
Insertion of resistance in the rotcir of an induction motor to develop a given torque
10.
The efficiency of a transformer will be maximum when