DC Motors - Online Free Mock Test-2
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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:
- Which of the following motors is usually used in household refrigerators?
- Which of the following loss in a D.C. generator varies significantly with the load current?
- Hopkinson’s test on D.C. machines is conducted at
- The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by
- The speed of a D.C. shunt motor more than its full-load speed can be obtained by
- In D.C. motor which of the following can sustain the maximum temperature rise?
- D.C. series motors are used
- Flywheel is used with D.C. compound motor to reduce the peak demand by the motor, compound motor will have to be
- If I2 be the armature current, then speed of a D.C. shunt motor is
- Why are the D.C. motors preferred for traction applications?
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Also Read:
Top 40 Typical Interview Questions and Answers for DC Motors Electrical Engineering
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