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Electrical Machines
Induction motors provided with open slots have
leading power factor.
more breakdown torque.
less breakdown torque.
higher efficiency.
leading power factor.
more breakdown torque.
less breakdown torque.
higher efficiency.
Answer
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Related Question
Electrical Machines
A 3 - Φ induction motor draws an current of 50 A from mains when starts by direct switching. If an auto transformer with 60 % tapping is used for starting the current drawn from the mains will be
80.
36.
50.
18.
80.
36.
50.
18.
Answer
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Electrical Machines
No load test on induction motor is conducted to find which of the following losses?
All of these
Stator copper loss
Stator core loss
Rotational loss
All of these
Stator copper loss
Stator core loss
Rotational loss
Answer
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Electrical Machines
Series booster is a
permanent magnet DC generator.
separately excited DC generator.
series wound DC generator.
shunt wound DC generator.
permanent magnet DC generator.
separately excited DC generator.
series wound DC generator.
shunt wound DC generator.
Answer
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Electrical Machines
To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used.
Any of above method.
Rheostatic control.
Ward Leonard control.
None of above.
Any of above method.
Rheostatic control.
Ward Leonard control.
None of above.
Answer
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Electrical Machines
The armature core of a DC machine is laminated to minimise
eddy-current loss
temperature rise
mechanical loss
hysteresis loss
eddy-current loss
temperature rise
mechanical loss
hysteresis loss
Answer
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