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Electrical Machines
Two transformers operating in parallel will share the load depending on their
efficiency
ratings
leakage reactance
per unit impedance
efficiency
ratings
leakage reactance
per unit impedance
Answer
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Related Question
Electrical Machines
Which type of single phase induction motor is having the highest power factor at full load ?
Shaded pole type.
Split phase type.
Capacitor start.
Capacitor run type.
Shaded pole type.
Split phase type.
Capacitor start.
Capacitor run type.
Answer
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Electrical Machines
When a short circuit test on a transformer is performed at 25 V, 50 Hz, the drawn current is I1. If the test is performed by 25 V and 25 Hz and power drawn current is I2, then
I1 = I2
I1 < I2
I1 > I2
None of these
I1 = I2
I1 < I2
I1 > I2
None of these
Answer
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Electrical Machines
In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will
shift forward by 90°
shift forward by more than 90°
shift forward by less than 90°
coincide with the GNA
shift forward by 90°
shift forward by more than 90°
shift forward by less than 90°
coincide with the GNA
Answer
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Electrical Machines
A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor?
850 rpm
1000 rpm
900 rpm
950 rpm
850 rpm
1000 rpm
900 rpm
950 rpm
Answer
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Electrical Machines
If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will
continue running in the same direction as before.
run in a direction opposite to previous one.
get damaged.
not run.
continue running in the same direction as before.
run in a direction opposite to previous one.
get damaged.
not run.
Answer
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