6.

62,

63.

64.

65,

66,

67,

Which one of the following method is not suited for starting a squirrel cage induction motor ?
(ಹ) DOL starting (8) Auto transformer starting
(ಲ) Star Delta starting (D) Rotor Resistance starting

What happens if single phasing occurs when a 3 phase induction motor is running at நத
full load ?

(^) Motor stops

(B) Motor stalls

(ಲ) Motor keeps running as 1 phase motor

(D) Motor keeps running as 3 phase motor

The rotor of an induction motor runs nearly at 1/7t of synchronous speed. This phenomenon
is called

ശു Cogging ൫ Crawling

(C) Magnetic Locking (D) Magnetic breaking

For a double squirrel cage motor outer gauge resistance is that of inner cage
resistance,

(ಹಿ) Less than (8) Greater than (ಲ) Equalto (D) Half

A universal motor runs at 2000 rpm and develops a back emf of 200 V, when connected to
220 V DC supply. At what speed will it run if the motor is connected to a 220 V AC supply.
Given that the back emf developed under this condition is 160 V approximately.

(A) 1600 rpm (B) 2000 rpm (ಲ) 2500 rpm (D) Zero

കുട the load on the alternator is varied, its terminal voltage changes due to the following
೫೦85005.

(5) Voltage drop due to armature resistance

(B) Voltage drop due to armature leakage reactance
(ಲ) Voltage drop due to armature reactance

(D) All the above

At Upf, Effect of armature reaction in alternator is
(5) Cross magnetising (B) De magnetising
(C) Magnetising (D) No effect

029/2018 10 A