101. |
DC series motors are used
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Answer:
Option (d) |
102. |
In the case of DC Shunt Motor electromagnetic torque developed is
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Answer:
Option (b) |
103. |
A 240 V DC series motor takes 40 A when giving its rated output at 1500 rpm. Its resistance is 0.3 ohms. The value of resistance which must be added to obtain rated torque at 1000 rpm is
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Answer:
Option (a) |
104. |
Interpoles in a DC motor must be
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Answer:
Option (c) |
105. |
Which DC motor will have the least percentage increase of input current, for the same percentage increase in the torque
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Answer:
Option (b) |
106. |
Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become
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Answer:
Option (c) |
107. |
For a given torque, reducing diverter resistance of a DC series motor causes
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Answer:
Option (d) |
108. |
Field diverter method of speed control of a DC series motor gives speed above rated one due to reduction of
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Answer:
Option (b) |
109. |
The field diverter resistance for a DC series motor is of an order of
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Answer:
Option (a) |
110. |
In speed control of DC Series motor, speed lower than the rated speed can be obtained by
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Answer:
Option (b) |