Q. Which power is mentioned on a name plate of a motor?

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Q. An electric motor is having constant output power. So, motor will have a torque speed characteristic _______________________

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Q. Which of the following quantity will decrease if supply voltage is increased?

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Q. In which of the following case we will get maximum power?

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Q. Sometimes motor has to be de-rated.

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Q. The armature shaft of a DC motor must be able to withstand ______________

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Q. In DC machines the residual magnetism is present. The order of residual magnetism is ___________

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Q. Sparking is discouraged in a DC motor.

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Q. Which of the following motor is used where high starting torque and wide speed range control is required?

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Q. The armature voltage control of DC motor will provide ___________

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Q. As there is no back emf at the instant of starting a DC motor, in order to prevent a heavy armature current from flowing though the armature circuit ___________

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Q. What will happen to torque if back emf and speed of the DC motor is doubled?

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Q. At the instant of starting, when a DC motor is put on supply, it will behave like ______________

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Q. All others are advantages of DC motor over AC motor except _______________

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Q. If a DC motor designed for 45°C ambient temperature is to be used for 55°C ambient temperature, then the motor ___________

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Q. Torque developed by a DC motor depends upon _____________

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Q. For very sensitive and wide speed control, which of the following method is preferred?

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Q. Field weakening control method is used for the speed _________

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Q. Armature resistance control method is used for the speed _____________

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Q. Which function is performed by counter emf of a DC motor?

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