Q. What are the materials used for brushes in dc machines?

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Q. Function of yoke is to provide the return path for magnetic flux.

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Q. The angle (electrical) made by brushes with axes of adjoining filed poles is ______________

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Q. In a DC machine, rectification process is carried out in order to get unidirectional output (DC). This rectification process is carried out by ______________

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Q. Which of the following part is used in construction of DC machine but not in AC machine?

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Q. In a DC machine fractional pitch winding is used to _______________

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Q. In normal dc machines operating at full-load conditions, the most powerful electromagnet is _________

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Q. If a DC motor is connected to AC supply what will happen then?

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Q. The armature of DC motor is laminated to ____________

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Q. Why are the DC motors preferred for traction applications?

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Q. Which of the following load application normally needs starting torque more than the rated torque?

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Q. Which of the following motors can be used to drive the rotary compressor?

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Q. Which DC motor is used with flywheel for intermittent light and heavy loads?

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Q. Separately excited DC generators are still used in _________________

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Q. In world today, around 25% of the motors are manufactured are DC motors.

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Q. Maximum torque in a DC machine is limited by ______________

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Q. Which of the following motor can replace DC series motor?

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Q. Which motor has almost replaced DC shunt motor from its applications?

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Q. DC shunt motor is still used instead of synchronous motor in _____________

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Q. Which type motors are preferred for lathes?

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