MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The power slip characteristic is given as? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14a.png"><img alt="The power slip characteristic graph - option a" class="alignnone size-full wp-image-161050" height="151" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14a.png" width="300"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14b.png"><img alt="The power slip characteristic graph - option b" class="alignnone size-full wp-image-161051" height="156" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14b.png" width="300"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14c.png"><img alt="The power slip characteristic graph - option c" class="alignnone size-full wp-image-161052" height="151" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14c.png" width="300"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14d.png"><img alt="The power slip characteristic graph - option d" class="alignnone size-full wp-image-161053" height="137" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14d.png" width="300"/></a> |
| Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14b.png"><img alt="The power slip characteristic graph - option b" class="alignnone size-full wp-image-161051" height="156" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q14b.png" width="300"/></a> | |
| 2. |
Developed torque during plugging is _________ |
| A. | negative |
| B. | positive |
| C. | zero |
| D. | any of the mentioned |
| Answer» C. zero | |
| 3. |
Mechanical power developed in the braking region of the induction motor is _________ |
| A. | negative |
| B. | positive |
| C. | zero |
| D. | any of the mentioned |
| Answer» B. positive | |
| 4. |
At starting, developed mechanical power is _____ and developed torque is ______ |
| A. | zero, not zero |
| B. | zero,zero |
| C. | not zero, zero |
| D. | not zero, maximum |
| Answer» B. zero,zero | |
| 5. |
Changing the rotor resistance will also affect _________ |
| A. | starting torque, speed, current |
| B. | maximum torque, speed, current |
| C. | maximum torque, speed, current, starting torque |
| D. | speed and current |
| Answer» B. maximum torque, speed, current | |
| 6. |
Slip greater than unity is obtained practically by _________ |
| A. | plugging |
| B. | changing phase sequence |
| C. | changing stator leads |
| D. | any of the mentioned |
| Answer» E. | |
| 7. |
When an induction generator is connected to an infinite bus, it _________ |
| A. | requires no capacitor bank |
| B. | requires star connected capacitor bank |
| C. | requires delta connected capacitor bank |
| D. | requires any capacitor bank |
| Answer» B. requires star connected capacitor bank | |
| 8. |
Induction generator is equivalent to _________ |
| A. | underexcited alternator |
| B. | dc generator |
| C. | over excited alternator |
| D. | leading over excited alternator |
| Answer» B. dc generator | |
| 9. |
The reactance vs slip is given by? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4a.png"><img alt="The reactance vs slip graph - option a" class="alignnone size-full wp-image-161046" height="235" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4a.png" width="277"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4b.png"><img alt="The reactance vs slip graph - option b" class="alignnone size-full wp-image-161047" height="243" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4b.png" width="289"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4c.png"><img alt="The reactance vs slip graph - option c" class="alignnone size-full wp-image-161048" height="243" sizes="(max-width: 300px) 100vw, 300px" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4c.png 300w, https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4c-100x80.png 100w" width="300"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4d.png"><img alt="The reactance vs slip graph - option d" class="alignnone size-full wp-image-161049" height="226" sizes="(max-width: 287px) 100vw, 287px" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4d.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4d.png 287w, https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4d-100x80.png 100w" width="287"/></a> |
| Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4b.png"><img alt="The reactance vs slip graph - option b" class="alignnone size-full wp-image-161047" height="243" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q4b.png" width="289"/></a> | |
| 10. |
If the reactance of the 3-phase slip ring induction motor is increased then the torque-slip characteristic varies as? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3a.png"><img alt="Reactance of 3-phase slip ring induction motor is increased for varies - option a" class="alignnone size-full wp-image-161043" height="225" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3a.png" width="300"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3b.png"><img alt="Reactance of 3-phase slip ring induction motor is increased for varies - option b" class="alignnone size-full wp-image-161044" height="220" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3b.png" width="300"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2c.png"><img alt="Reactance of 3-phase slip ring induction motor is increased for varies - option c" class="alignnone size-full wp-image-161041" height="225" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2c.png" width="300"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3d.png"><img alt="Reactance of 3-phase slip ring induction motor is increased for varies - option d" class="alignnone size-full wp-image-161045" height="225" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3d.png" width="300"/></a> |
| Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3b.png"><img alt="Reactance of 3-phase slip ring induction motor is increased for varies - option b" class="alignnone size-full wp-image-161044" height="220" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q3b.png" width="300"/></a> | |
| 11. |
Choose the most appropriate from the following characteristics of 3 phase induction motor torque-slip characteristics. |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2a.png"><img alt="The characteristics of 3 phase induction motor torque-slip characteristics - option a" class="alignnone size-full wp-image-161039" height="200" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2a.png" width="300"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2b.png"><img alt="The characteristics of 3 phase induction motor torque-slip characteristics - option b" class="alignnone size-full wp-image-161040" height="202" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2b.png" width="300"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2c.png"><img alt="The characteristics of 3 phase induction motor torque-slip characteristics - option c" class="alignnone size-full wp-image-161041" height="225" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2c.png" width="300"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2d.png"><img alt="The characteristics of 3 phase induction motor torque-slip characteristics - option d" class="alignnone size-full wp-image-161042" height="207" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2d.png" width="300"/></a> |
| Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2b.png"><img alt="The characteristics of 3 phase induction motor torque-slip characteristics - option b" class="alignnone size-full wp-image-161040" height="202" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-experienced-q2b.png" width="300"/></a> | |