DC Motors - Online Free Mock Test-3
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Number of Questions - 40 MCQ's
Notes : The Quiz makes In multiple-choice quiz, there is a timer for 50 seconds/question.When 10 seconds is left, automatically the timer is red in color.finally, when the time is end,the correct answer is automatically shown.
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A DC motor is any of a class of rotary electrical motors that converts direct current (DC) electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electro-mechanical or electronic, to periodically change the direction of current in part of the motor.DC motors were the first form of motor widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight brushed motor used for portable power tools and appliances. Larger DC motors are currently used in propulsion of electric vehicles, elevator and hoists, and in drives for steel rolling mills. The advent of power electronics has made replacement of DC motors with AC motors possible in many applications. More Details visit https://en.wikipedia.org/wiki/DC_motor
Example Questions:
- The hysteresis loss in a D.C. machine least depends on
- D.C. motor is to drive a load which has certain minimum value for most of the time and some peak value for short duration. We will select the
- If the field of a D.C. shunt motor gets opened while motor is running
- The ratio of starting torque to full-load torque is least in case of
- For which of the following applications a D.C. motor is preferred over an A.C. motor?
- The armature voltage control of D.C. motor provides
- The condition for maximum efficiency for a D.C. generator is
- Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of
- In case the back e.m.f. and the speed of a D.C. motor are doubled, the torque developed by the motor will
- Which of the following motors is most suitable for signalling devices and many kinds of timers?
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Top 40 Typical Interview Questions and Answers for DC Motors Electrical Engineering
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