C=Shading coils,
D:-Resistor
Correct Answer:- Option-C

Question75 -Altemators are rated in

۸۸۵۸

Correct Answer

۱۴۰ 0۶۸
Question76:-Rotor of an induction motor runs always
‘Asin opposite direction to the field
B:-At less than synchronous speed
‏می‎ synchronous speed
0:40 more than synchronous speed
Correct Answer: Option-8
Question77:-Turbo alternators usually have
A=6 poles
8:8 poles
C2 poles
D:12 poles
Correct Answer:- Option-C
Question78:-Starting capacitor of a single phase motor is.
AcElectrolytic capacitor
B:-Paper capacitor
Mica capacitor
D:Ceramic capacitor
Correct Answer Option-A
Question79:-In star delta starter of an induction motor
‘AsResistance is put in the stator circuit

8

Resistance is put inthe rotor circuit

C-Applied voltage per phase is 57.8% of the line voltage

Reduced voltage is applied to the motor and starter
Correct Answer:- Option-C

Question80:-Hunting in alternator is prevented by using
‏ماهم‎ winding
B:Wave winding

CExisting winding

Damper winding
Correct Answer:- Option-D
Question8-Efficiency of a power transformer is of the order of
۸-96
8:-98%
೦75%
0:30%
Correct Answer: Option-8
Question82:-The principle of working of a transformer is
As Mutual induction
B:-Self induction
C+Dynamie induction
D-Statie induction
Correct Answer Option-A
Question83:-The path of the magnetic flux in a transformer has
AsHigh conductivity
B:-Low resistance

C:-Low reluctance

High resistance