Electrical Engineering
GATE EE concept:synchronous-machines PYQs
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How to practice concept:synchronous-machines
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.
Question 8
Open questionEEMCQ1 markNeeds review
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
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 20
Open questionEENAT1 markNeeds review
A three-phase, 50Hz, star-connected cylindrical-rotor synchronous machine is running as a motor. The machine is operated from a 6.6 kV grid and draws current at unity power factor (UPF). The synchronous reactance of the motor is 30 Ω per phase. The load angle is 30°. The power delivered to the motor in kW is _____. (Give the answer up to one decimal place).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 46
Open questionEENAT2 marksNeeds review
Two parallel connected, three-phase, 50Hz, 11 kV, star-connected synchronous machines A and B, are operating as synchronous condensers. They together supply 50 MVAR to a 11 kV grid. Current supplied by both the machines are equal. Synchronous reactances of machine A and machine B are 1Ω and 3Ω, respectively. Assuming the magnetic circuit to be linear, the ratio of excitation current of machine A to that of machine B is ________. (Give the answer up to two decimal places.)
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