Q. Which DC motor is generally preferred for cranes and hoists?

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Q. Which of the following motor has the poorest speed regulation?

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Q. Buses, trains, trolleys, hoists, cranes make use of DC series motor because __________

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Q. DC motor is to drive a load which is having certain minimum value for most of the time and some peak value for short duration. We will select the _______

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Q. Which DC motor has got maximum self-relieving property?

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Q. Which motor should not be started on no-load?

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Q. Actual speed obtained at any value of armature current comparing to speed obtained by assuming linear magnetic assumption in DC series motor is _______

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Q. Torque of a DC series motor is __________

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Q. Practically, at higher values of armature current torque does not follow its relationship with armature current.

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Q. What will happen to a torque, if a DC series motor is accidentally connected to single phase ac supply voltage?

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Q. Differentially compound DC motors are used in applications requiring _______

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Q. Which DC motor is more preferred for elevators?

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Q. Which DC motor is used in shears and punches?

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Q. Which DC motor has got maximum self-loading property?

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Q. For the same H.P. rating and full load speed, which of the following motor has poor starting torque?

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Q. Unlike DC series motor, DC compound motor can be started on no-load.

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Q. Flywheel is used with DC compound motor to reduce the peak demand by the motor, compound motor has to be _____________

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Q. What will happen if shunt field suddenly opens, in a differential compound DC motor?

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Q. What will happen if the series field of a differential compound motor is short circuited?

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Q. What will happen if the series field of a cumulative compound motor is short circuited?

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