=(Ns-N)/(60)*
*(PXxE)/(120)°
*(PxxNS)/(120)*
Correct Answer:- Option-D
Question69:-Where the Damper winding is placed in synchronous motor ?
A:-Shaft
B:-Poles
C:-Poleshoes
D:-All of the above
Correct Answer:- Option-C
Question70:-Capacity of a capcitor filled in table fan or ceiling fan :
A:-1 to 1.5 pf
B:-3 to 3.5 yf
C:-2.5 to 3 uf
D:-2 to 2.5 pf
Correct Answer:- Option-D
Question71:-How the current coils and pressure coils are connected in megger ?
A:-At 90° to each other
B:-At 60° to each other
C:-At 45° to each other
D:-At 35° to each other
Correct Answer:- Option-A
Question72:-Supertension cables from :
A:-33000 Volt to 66000 Volt
B:-1000 Volt 11000 Volt
C:-11000 Volt to 22000 Volt
D:-22000 Volt to 33000 Volt
Correct Answer:- Option-D
Question73:-The distance between two adjacent line poles is called :
A:-Sag
B:-Span
C:-HSL
D:-Guarding
Correct Answer:- Option-B
Question74:-The distance that must be provided between line conductors for 440 V :
A:-50 cm - 60 cm
B:-45 cm - 60 cm
C:-45 cm - 50cm
D:-30 cm - 45 cm
Correct Answer:- Option-D
Question75:-Rotary converter runs at :
A:-Below synchronous speed
B:-Synchronous speed
C:-Above synchronous speed
D:-All of the above
Correct Answer:- Option-B
Question76:-A series RL circuit has a resistance of 30 Q and inductive resistance of 40 Q. The impedance is
4:-70 09
8:-50 0
6-102
D:-35 Q
Correct Answer:- Option-B
Question77:-The magnetic field produced in the stator of a three phase induction motor rotates at
A:-Rotating speed
B:-Synchronous speed
C:-Asynchronous speed
D:-Slip speed
Correct Answer:- Option-B
Question78:-The meter used to measure the temperature of furnace is :