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ESE 2021 Technical Quiz 103||Basics-DC machines, induction machines, and synchronous machines

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Question 1

What will be the value of line current in three phase motor which operates at 500V and develops torque of 10kW at efficiency of 0.55 p.u with 0.80 power factor?

Question 2

A 500 HP, 440 V, 3-phase, 50 Hz induction motor runs at 950 r.p.m. when on full load with a synchronous speed of 1000 r.p.m. for this condition, the frequency of the rotor current will be

Question 3

The slip for the synchronous machines is

Question 4

A 3 phase, 60 Hz induction motor has a full load speed of 1200 rpm. The number of poles of motor is

Question 5

The slip of a 400 V, 3-phase, 4-pole, 50 Hz machine running at 1440 r.p.m. is
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Jun 11ESE & GATE EC