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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Q. By series armature resistance method, we can get _________________________

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Q. Consider the armature control method, where 10 Ω resistance is connected in series with armature in first case. For second case resistance value is changed 100 Ω. Then ____________

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Q. Speed regulation of armature series control method is __________

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Q. In shunted rheostatic armature control method ______________

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Q. Which of the following is correct statement?

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Q. By series parallel method of armature control how many different speeds are possible?

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Q. Which method is best for series traction motors?

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Q. Ward Leonard method is ___________

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Q. Which of the following component is not used in Ward Leonard method?

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Q. In Ward Leonard speed control method for lowering the speed of the motor ______________

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Q. Reducing the armature voltage will give us _______________

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Q. In Ward Leonard speed control method for increasing the speed of the motor ______________

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Q. Reducing the field current will give us _______________

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Q. Speed-power characteristic for Ward Leonard speed control method _________________

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