1
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
Group I lists different applications and Group II lists the motors for these
applications. Match the application with the most suitable motor and choose the
right combination among the choices given there after:
Group I
P. Food mixer
Q. Cassette tape recorder
R. Domestic water pump
S. Escalator
Group II
1. Permanent magnet dc motor
2. Single phase induction motor
3. Universal motor
4. Three phase induction motor
5. DC series motor
6. Stepper motor
2
GATE EE 2003
MCQ (Single Correct Answer)
+1
-0.3
No-load test on a 3-phase induction motor was conducted at different supply
voltages and a plot of input power versus voltage was drawn. This curve was
extrapolated to intersect the y-axis. This intersection point yields
3
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A 3-phase Inductor Motor is driving a constant torque load at rated voltage and
frequency. If both voltage and frequency are halved, following statements relate
to the new condition if stator resistance, leakage reactance and core loss are
ignored.
P. The difference between synchronous speed and actual speed remains same
Q. The air-gap flux remains same
R. The stator current remains same
S. The p.u. slip remains same
Among the above, correct statements are
P. The difference between synchronous speed and actual speed remains same
Q. The air-gap flux remains same
R. The stator current remains same
S. The p.u. slip remains same
Among the above, correct statements are
4
GATE EE 2003
MCQ (Single Correct Answer)
+2
-0.6
A single phase induction motor with only the main winding excited would exhibit
the following response at synchronous speed
Paper analysis
Total Questions
Analog Electronics
8
Control Systems
10
Digital Electronics
5
Electric Circuits
10
Electrical and Electronics Measurement
10
Electrical Machines
14
Electromagnetic Fields
4
Power Electronics
7
Power System Analysis
17
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