A. dc generator
B. dc motor
C. transformer
D. all of the above
Correct Answer: dc motor ✔
Last Updated: July 02, 2018
Related MCQs
- With the increase in temperature, the speed of DC series motor__________?
- With the increase in temperature, the speed of DC shunt motor__________?
- If the load on a DC shunt motor is increases, its speed is slightly reduced due to__________?
- One D.C. motor drives another D.C. motor. The second D.C. motor when excited and driven__________?
- The speed of a D.C. shunt motor is required to be more than full load speed. This is possible by__________?
- In the D.C. motor the iron losses occur in__________?
- Which D.C. motor has got maximum self relieving property ?
- D.C. motor is to a drive a load which is almost nil for certain part of the load cycle and peak value for short duration. We will select this__________?
- 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 a D.C. shunt motor is working at full load and if shunt field circuit suddenly opens__________?
- Where D.C. motor of H.P. 12 or more requires frequent starting, stopping, reversing and speed control__________?
- When the armature of a D.C. motor rotates, e.m.f. induced is__________?
- In variable speed motor__________?
- Which method of braking is generally used in elevators ?
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- During rheostat braking of D.C. series motors__________?
- Hopkinson’s test on D.C. machines is conducted at__________?
- Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity ?
- The purpose of retardation test on D.C. shunt machines is to find out__________?
- D.C. generators are installed near the load centres to reduce__________?
- In a D.C. generator, the iron losses mainly take place in__________/
- D.C. generators are normally designed for maximum efficiency around__________?
- The condition for maximum efficiency for a D.C. generator is__________?
- The total losses in a well designed D.C. generator of 10 kW will be nearly__________?
- Which of the following losses are significantly reduced by laminating the core of a D.C. generator ?
- Which of the following loss in a D.C. generator is dissipated in the form of heat?
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- In a manual shunt motor starter?
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- Torque developed by a D.C. motor depends upon__________?
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- In a D.C. generator all of the following could be the effects of iron losses except__________?
- The hysteresis loss in a D.C. machine least depends on__________?
- Regenerative method of braking is based on that__________?
- The main disadvantage of the Ward-Leonard control method is__________?
- In Ward-Leonard control the lower limit of speed is imposed by________?
- For constant torque drive which speed control method is preferred ?
- Ward-Leonard control is basically a__________?
- Which motor should not be started on no-load ?
- Which of the following motors is most suitable for signalling devices and many kinds of timers ?
- Which of the following motors is usually used in house-hold refrigerators ?
- Why are the D.C. motors preferred for traction applications ?
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- Which of the following motors one will choose to drive the rotary compressor ?
- If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking?
- If a D.C. motor designed for 40°C ambient temperature is to be used for 50°C ambient temperature, then the motor__________?
- The armature voltage control of D.C. motor provides__________?
- The plugging gives the__________?
- For a D.C. shunt motor if the excitation is changed__________?
- Which motor has the poorest speed control?