Q. In variable speed motor ____________

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Q. The speed of a motor falls from 1200 rpm at no-load to 1050 rpm at rated load. The speed regulation of the motor is ____________

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Q. Which of the following is not the method of speed control in DC series motor?

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Q. For speed reversal, field control method is suitable.

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Q. For large motors what is the ratio of compensating winding is required for increasing the speed of the motor?

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Q. In diverter resistor field control method of DC series motor, variable resistor is added ________

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Q. Why it is advisable to use inductively wound diverter resistor?

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Q. For higher diverter resistance, speed-torque characteristic will lie ____________

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Q. In tapped field control method ____________

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Q. Which of the following method will not give many speed values for a DC series motor?

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Q. In series-parallel speed control method ______________

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Q. Where diverters are used?

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Q. What will happen to the speed of a series motor if the temperature of armature resistance is increased?

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Q. For which speed control method we get minimum efficiency?

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Q. The speed of a DC motor can be varied by changing ______________

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Q. For constant torque drive which of the following speed control method is preferred?

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Q. When the armature of a DC motor rotates, emf induced is in machine is called as ___________

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Q. Which of the following method is used for DC motor with 12+ HP requiring frequent start, stop, speed reversal?

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Q. Flux density distribution is distorted by armature control method.

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Q. In rheostatic series control method of armature we add ____________

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