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1
GATE EE 2000
MCQ (Single Correct Answer)
+1
-0.3
The phase sequence of a three-phase alternator will reverse if
A
the field current is reversed keeping the direction of rotation same
B
the field current remains the same but the direction of rotation is reversed
C
the field current is reversed and the number of poles is doubled
D
the number of poles is doubled without reversing the field current
2
GATE EE 1999
MCQ (Single Correct Answer)
+1
-0.3
Higher synchronous reactance is preferred in the present day alternators, because one can have
A
reduced sub-transient currents
B
reduced harmonic currents
C
reduced transient currents
D
higher voltage regulation with load
3
GATE EE 1998
MCQ (Single Correct Answer)
+1
-0.3
A synchronous generator connected to an infinite bus is overexcited. Considering only the reactive power, from the point of view of the system, the machine acts as
A
a capacitor
B
an inductor
C
a resistor
D
None of the above
4
GATE EE 1996
MCQ (Single Correct Answer)
+1
-0.3
During hunting of synchronous motor
A
negative phase sequence currents are generated
B
harmonics are developed in the armature circuit
C
damper bar develops torque
D
field excitation increases
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GATE EE Subjects
Electric Circuits
Three Phase Circuits Transient Response Graph Theory Two Port Networks Sinusoidal Steady State Analysis Network Elements Network Theorems
Electromagnetic Fields
Time Varying Fields Electrostatics Magnetostatics
Signals and Systems
Linear Time Invariant Systems Continuous and Discrete Time Signals Continuous Time Signal Fourier Transform Continuous Time Periodic Signal Fourier Series Discrete Time Signal Z Transformation Miscellaneous Continuous Time Signal Laplace Transform Sampling Theorem
Electrical Machines
Induction Machines D.C Machines Synchronous Machines Transformers
Engineering Mathematics
Calculus Vector Calculus Linear Algebra Differential Equations Probability and Statistics Transform Theory Complex Variable Numerical Methods
General Aptitude
Verbal Ability Logical Reasoning Numerical Ability
Power System Analysis
Parameters and Performance of Transmission Lines Power Generation Cost Power System Stability Symmetrical Components and Symmetrical and Unsymmetrical Faults Circuit Breaker Switch Gear and Protection Per Unit System Load Flow Studies High Voltage Dc Transmission Generating Power Station
Electrical and Electronics Measurement
Basic of Indicating Instruments Error Analysis and Measurement Measurement of Resistance and A.C Bridges Measurement of Energy and Power Digital Voltmeters Questions Potentiometer and Instrument Transformers Cathode Ray Oscilloscope
Analog Electronics
Diode Circuits and Applications Bjt and Mosfet Biasing Small Signal Modeling Feedback Amplifiers and Oscillator Circuits Operational Amplifier Frequency Response 555 Timer
Control Systems
Time Response Analysis Block Diagram and Signal Flow Graph Polar Nyquist and Bode Plot State Variable Analysis Root Locus Techniques Basics of Control System Routh Hurwitz Stability Controller and Compensator
Power Electronics
Choppers and Commutation Techniques Single and Three Phase Rectifier Power Semiconductor Devices Ac Voltage Controllers Inverters
Digital Electronics
Sequential Circuits Microprocessor Boolean Algebra Analog to Digital and Digital to Analog Converter Combinational Circuits Minimization Logic Families and Memories Logic Gates
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