176. In a level compound generator, the series field ampere-turns are

1. 1. in direct opposition to the shunt field ampereturns.

   
   
   

   2. in the same direction as the shunt field ampere-turns

   
   
   

   3. at 90° (elect) to the shunt field ampere-turns

   
   
   

   4. placed on the interpoles

   
   
   

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   NA

   Correct Option: B

   NA

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177. In a level compound gener ator the terminal voltage at half full load is

1. 1. same as the full load voltage

   
   
   

   2. same as the no-load voltage

   
   
   

   3. more than the no-load voltage

   
   
   

   4. less than the no-load voltage

   
   
   

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   NA

   Correct Option: C

   NA

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178. A dc generator running at fixed speed and with fixed shunt field resistance has short-circuit current

1. 1. less than the maximum load current that it can feed

   
   
   

   2. more than the maximum load current that it can feed.

   
   
   

   3. current equal to the maximum load current that it can feed.

   
   
   

   4. equal to the full load current.

   
   
   

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   NA

   Correct Option: A

   NA

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179. In a dc series motor. Assume negligible armature circuit resistance; the magnetic circuit is linear

1. 1. the speed varies inversely as the square root of the load torque; at a given torque load speed is directly proportional to the number of field turns.

   
   
   

   2. the speed varies inversely as the square of the load torque; at a given torque load speed is directly proportional to the number of field turns.

   
   
   

   3. the speed varies inversely as the load torque; at a given torque load speed is inver sely proportional to the number of field turns.

   
   
   

   4. the speed varies inversely as the square root of the load torque; at a given torque load speed is inversely proportional to the number of field turns.

   
   
   

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   NA

   Correct Option: D

   NA

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180. In a dc shunt motor

1. 1. no-load speed is directly proportional to flux/ pole and inversely proportional armature voltage; the speed drops off linearly with load torque.

   
   
   

   2. no-load speed is directly proportional to flux/ pole and directly proportional to armature voltage; the speed drops of linearly with load torque.

   
   
   

   3. no-load speed is inversely proportional to flux/pole and directly proportional to armature voltage; the speed rises linearly with load torque.

   
   
   

   4. no-load speed is inversely proportional to flux/pole and directly proportional to armature voltage; the speed rises linearly with load torque

   
   
   

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   NA

   Correct Option: C

   NA

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