Electrical Machines
Induction Machines
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Synchronous Machines
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1
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
The dc motor, which can provide zero speed regulation at full load without any controller is
A
series
B
shunt
C
cumulative compound
D
differential compound
2
GATE EE 2006
MCQ (Single Correct Answer)
+1
-0.3
In a $$DC$$ machine, which of the following statements is true?
A
Compensating winding is used for neutralizing armature reaction while inter pole winding is used for producing residual flux.
B
Compensating winding is used for neutralizing armature reaction while inter pole winding is used for improving commutation.
C
Compensating winding is used of improving commutation while inter pole winding is used for neutralizing armature reaction.
D
Compensating winding is used for improving commutation while inter pole winding is used for producing residual flux .
3
GATE EE 2002
MCQ (Single Correct Answer)
+1
-0.3
A dc series motor fed from rated supply voltage is overloaded and its magnetic circuit is saturated. The torque-speed characteristic of this motor will be approximately represented by which curve of Fig. GATE EE 2002 Electrical Machines - D.C Machines Question 62 English
A
Curve A
B
Curve B
C
Curve C
D
Curve D
4
GATE EE 2001
MCQ (Single Correct Answer)
+1
-0.3
In case of an armature controlled separately excited dc motor drive with closed loop speed control, an inner current loop is useful because it
A
limits the speed of the motor to a safe value
B
helps in improving the drive energy efficiency
C
limits the peak current of the motor to the permissible value
D
reduces the steady state speed error
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement