1
GATE EE 2022
Numerical
+1
-0
The frequencies of the stator and rotor currents flowing in the three-phase 8-pole induction motor are 40 Hz and 1 Hz, respectively. The motor speed, in rpm, is ________. (round off to nearest integer).
Your input ____
2
GATE EE 2021
MCQ (Single Correct Answer)
+1
-0.33
$$ \text { Consider the table given : } $$
| Constructional feature | Machine type | Mitigation |
| P. Damper bars | S. Induction motor | X. Hunting |
| Q. Skewed rotor slots | T. Transformer | Y. Magnetic locking |
| R. Compensating winding | U. Synchronous machine | Z. Armature reaction |
| V. DC machine |
The correct combination that relates the constructional feature, machine type and mitigation is
3
GATE EE 2021
Numerical
+1
-0
The power input to a $500 \mathrm{~V}, 50 \mathrm{~Hz}, 6$ pole, 3 phase induction motor running at 975 rpm is 40 kW . The stator losses are 1 kW . If the total friction and windage losses are 2.025 kW , then the efficiency is
$\_\_\_\_$ $\%$.
Your input ____
4
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+1
-0.3
A 3-phase, 4-pole, 400 V, 50 Hz squirrel-cage induction motor is operating at a slip of 0.02. The
speed of the rotor flux in mechanical rad/sec, sensed by a stationary observer, is closest to
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