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Electrical Machines
In escalator which motor is used?
DC shunt motor.
3 - φ IM.
1 - φ IM.
Universal motor.
DC shunt motor.
3 - φ IM.
1 - φ IM.
Universal motor.
Answer
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Related Question
Electrical Machines
Which of the following bearings and their uses are correct
roller bearings → large machines
both A and B
neither 1 nor 2
ball bearings → small machines
roller bearings → large machines
both A and B
neither 1 nor 2
ball bearings → small machines
Answer
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Electrical Machines
Two of supply terminals to a 3 - Φ induction motor get interchanged during re-connection after normal maintenance. When switched on the supply, the motor will
rotate in the same direction as before maintenance.
rotate in direction opposite to that before maintenance.
not start at all.
get heated and damaged.
rotate in the same direction as before maintenance.
rotate in direction opposite to that before maintenance.
not start at all.
get heated and damaged.
Answer
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Electrical Machines
Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator?
201.02 V.
205 V.
210 V.
212 V.
201.02 V.
205 V.
210 V.
212 V.
Answer
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Electrical Machines
Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements
2 and 4 are correct
1, 2 and 4 are correct
1, 2 and 3 are correct
1 and 3 are correct
2 and 4 are correct
1, 2 and 4 are correct
1, 2 and 3 are correct
1 and 3 are correct
Answer
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Electrical Machines
A crusher is equipped with
Slip ring induction motor.
Synchronous motor.
Reluctance motor.
DC shunt motor.
Slip ring induction motor.
Synchronous motor.
Reluctance motor.
DC shunt motor.
Answer
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