Polyphase Induction Motors QUESTIONS AND ANSWERS

Electrical Engineering : Polyphase Induction Motors QUESTIONS AND ANSWERS :: part4 : 16 to 20

Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

16.For driving high inertia loods best type of induction motor suggested is

slip ring type

squirrel cage type

any of the above

none of the above

17.When /?2 is tne rotor resistance, .X2 the rotor reactance at supply frequency and s the slip, then the condition for maximum torque under running condi-tions will be

sR2X2 = 1 (b) sR2 = X2

R2 = sX2 id) R2 = s2X2

In case of a double cage induction motor, the inner cage has

18.In induction motor, percentage slip depends on

supply frequency

supply voltage

copper losses in motor

none of the above

19.The torque of an induction motor is

directly proportional to slip

inversely proportional to slip

proportional to the square of the slip