A. Voltage control method
B. Field control method
C. Armature control method
D. All above methods
Correct Answer: Armature control method ✔
Last Updated: July 02, 2018
Related MCQs
- The armature torque of the D.C. shunt motor is proportional to__________?
- As -the load is increased the speed of D.C. shunt motor will__________?
- Which of the following motor has the poorest speed regulation ?
- Buses, trains, trolleys, hoists, cranes require high starting torque and therefore make use of__________?
- In a differentially compounded D.C. motor, if shunt field suddenly opens__________?
- Following motor is used where high starting torque and wide speed range control is required?
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- In D.C. machines the residual magnetism is of the order of__________?
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- The condition for maximum power in case of D.C. motor is__________?
- The mechanical power developed by a shunt motor will be maximum when the ratio of back e.m.f. to applied voltage is__________?
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- Sparking at the commutator of a D.C. motor may result in__________?
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- D.C. series motors are used__________?
- If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens__________?
- Which D.C. motor will be suitable along with flywheel for intermittent light and heavy loads?
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- The power mentioned on the name plate of an electric motor indicates__________?
- The current drawn by the armature of D.C. motor is directly proportional to__________?
- In a D.C. series motor, if the armature current is reduced by 50%, the torque of the motor will be equal to
- The speed of a D.C. series motor is__________?
- The starting resistance of a D.C. motor is generally__________?
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- The ratio of starting torque to full-load torque is least in case of__________?
- In case-the conditions for maximum power for a D.C. motor are established, the efficiency of the motor will be__________?
- A three point starter is considered suitable for__________?
- In D.C. machines fractional pitch winding is used__________?
- In which of the following applications D.C. series motor is invariably tried?
- By looking at which part of the motor, it can be easily confirmed that a particular motor is D.C. motor?
- These days D.C. motors are widely used in__________?
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- In case of D.C. shunt motors the speed is dependent on back e.m.f. only because__________?
- What will happen if the back e.m.f. of a D.C. motor vanishes suddenly?
- A direct on line starter is used: for starting motors__________?
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- The speed of a D.C. shunt motor more than its full-load speed can be obtained by__________?
- When two D.C. series motors are connected in parallel, the resultant speed is__________?
- To get the speed of D.C, motor below the normal without wastage of electrical energy is used?
- If a D.C. motor is connected across the A.C. supply it will__________?
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- For starting a D.C. motor a starter is required because__________?