27:

18.

19.

20.

21.

22:

28.

24.

The condition for maximum running torque for a 3 phase induction motor is :

ல 12-82 (B) R2=X2

(0 R2=Xo2 (D) X2 =Xo2
In a vibrating reed type frequency meter the frequency of supply reads through vibration, the
vibration of desired frequency depends upon :

(ಗ) Width of the reed (B) Voltage

(¢) Type of core (D) Length of the reed

In induction type watt meter the copper shading Band used for :
(ക Uniforms flux distribution
(B) Damping purpose
(~) Produce exact 90° phase difference between voltage and current

(D) To reduce stray magnetic error

is not a standard sweep of ceiling fan.
(A) 1250 mm (8) 1400 mm
(@) 1050 mm (D) 1200 mm

What are the tests conducted to draw the circle diagram of an induction motor?
(A) 50 566% and OC test
(B) Swim bearns test
(€) No load test, short circuit test, stator resistance test
(D) Short circuit test, back to back test

The joint used in over head line where considerable tensile strength required is :
(മ Brittania joint (8) Straight married joint
(C) Straight running joint (D) Brittania T joint

In electricians solder the percentage of tin and lead is :

മു 60% lead 40% tin ൫ 60% tin 40% lead

)0 40% tin 60% copper (D) 40% zinc 60% tin
In an induction motor the phenomenon found that the motor having a tendency to rotate
1/7t of its normal speed is called :

(A) Cogging (B) Phase locking

(C) Hunting (D) Crowling

5 141/2015
[P.T.0]