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Electrical Machines
What is/are the necessary conditions for parallel operation of alternators?
Terminal voltage is same
Speed of alternators should be same
Frequency should be same
Both 1and 2
Terminal voltage is same
Speed of alternators should be same
Frequency should be same
Both 1and 2
Answer
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Related Question
Electrical Machines
In synchronous motor the torque is proportional to
1/P²
Power P
1/P
P²
1/P²
Power P
1/P
P²
Answer
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Electrical Machines
Which of the following machine is invariably provided with forced ventilation?
Fractional horse power high speed motor.
Hermetically sealed motor of refrigerator.
Fractional horse power slow speed motor.
50 MW generator in a power plant.
Fractional horse power high speed motor.
Hermetically sealed motor of refrigerator.
Fractional horse power slow speed motor.
50 MW generator in a power plant.
Answer
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Electrical Machines
Two DC generators having equal open-circuit emfs but slight different load characteristics are operating in parallel, then
the machine will share load equally.
the machine with more drooping characteristic will supply less load.
the machine with more drooping characteristic will supply more load.
None of these
the machine will share load equally.
the machine with more drooping characteristic will supply less load.
the machine with more drooping characteristic will supply more load.
None of these
Answer
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Electrical Machines
If a shunt generator delivers 100 A at 200 V, and the resistances of the shunt field and armature are 100 ohms and 0.01 ohms respectively, the generator emf will be
parallel.
any one of the connection.
series.
no resistance is connected.
parallel.
any one of the connection.
series.
no resistance is connected.
Answer
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Electrical Machines
Which of the following statement is true for an AC synchronous motor?
It is a high reluctance motor.
It is a constant speed motor.
It is a variable speed motor.
It is a step angled motor.
It is a high reluctance motor.
It is a constant speed motor.
It is a variable speed motor.
It is a step angled motor.
Answer
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