MCQOPTIONS
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MCQOPTIONS
This section includes 9 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. |
For a 220-V level compound generator the terminal voltage at the half load is? |
| A. | more than 220-V |
| B. | same as no-load voltage |
| C. | more than no-load voltage |
| D. | lesser than no-load voltage |
| Answer» C. more than no-load voltage | |
| 2. |
The external characteristic for the dc series generator is? |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12a.png"><img alt="The external characteristic for the dc series generator - option a" class="alignnone size-full wp-image-160824" height="245" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12a.png" width="300"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12b.png"><img alt="The external characteristic for the dc series generator - option b" class="alignnone size-full wp-image-160825" height="224" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12b.png" width="300"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12c.png"><img alt="The external characteristic for the dc series generator - option c" class="alignnone size-full wp-image-160826" height="216" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12c.png" width="276"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12d.png"><img alt="The external characteristic for the dc series generator - option d" class="alignnone size-full wp-image-160827" height="238" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12d.png" width="284"/></a> |
| Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12b.png"><img alt="The external characteristic for the dc series generator - option b" class="alignnone size-full wp-image-160825" height="224" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q12b.png" width="300"/></a> | |
| 3. |
The voltage drop in terminal voltage from no-load to full load in a shunt generator can be compenated using _________ |
| A. | aiding series field |
| B. | long-shunt, diferential field |
| C. | aiding shunt field |
| D. | any of the measures |
| Answer» B. long-shunt, diferential field | |
| 4. |
For a given dc generator, the external characteristic is plotted. Without using further plots, how can we obtain internal characteristic? |
| A. | By adding the IaRa drop to the plot |
| B. | By adding armature reaction |
| C. | By reducing IaRa drop |
| D. | All of the mentioned |
| Answer» B. By adding armature reaction | |
| 5. |
Identify the armature characteristic of the dc generator. |
| A. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7a.png"><img alt="The armature characteristic of the dc generator - option a" class="alignnone size-full wp-image-160817" height="233" sizes="(max-width: 290px) 100vw, 290px" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7a.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7a.png 290w, https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7a-100x80.png 100w" width="290"/></a> |
| B. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7b.png"><img alt="The armature characteristic of the dc generator - option b" class="alignnone size-full wp-image-160818" height="246" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7b.png" width="288"/></a> |
| C. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7c.png"><img alt="The armature characteristic of the dc generator - option c" class="alignnone size-full wp-image-160819" height="223" sizes="(max-width: 281px) 100vw, 281px" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7c.png" srcset="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7c.png 281w, https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7c-100x80.png 100w" width="281"/></a> |
| D. | <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7d.png"><img alt="The armature characteristic of the dc generator - option d" class="alignnone size-full wp-image-160820" height="218" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7d.png" width="300"/></a> |
| Answer» B. <a href="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7b.png"><img alt="The armature characteristic of the dc generator - option b" class="alignnone size-full wp-image-160818" height="246" src="https://www.sanfoundry.com/wp-content/uploads/2017/05/electrical-machines-questions-answers-operating-characteristics-dc-generator-q7b.png" width="288"/></a> | |
| 6. |
The air gap line represents _________ |
| A. | magnetic behaviour of the air gap of the dc machine |
| B. | magnetic behaviour of the air gap of the induction machine |
| C. | magnetic behaviour of the iron core |
| D. | all of the mentioned |
| Answer» B. magnetic behaviour of the air gap of the induction machine | |
| 7. |
Armature characteristic is also known as _________ |
| A. | regulation characteristic |
| B. | magnetization characteristic |
| C. | external characteristic |
| D. | load characteristic |
| Answer» B. magnetization characteristic | |
| 8. |
A student forgot to mark the x-y axes in his experiments but he just noted down the cause and the effect for each. How will he conclude about the armature characteristic out of the all plotted graphs? |
| A. | By marking graph for constant terminal voltage |
| B. | By marking graph for constant field current |
| C. | By marking graph for constant armature current |
| D. | By marking graph for constant speed |
| Answer» B. By marking graph for constant field current | |
| 9. |
The external characteristic is plotted between ____________ |
| A. | terminal voltage vs armature current at constant excitation |
| B. | terminal voltage vs field current at constant armature current |
| C. | induced armature emf vs armature current at constant excitation |
| D. | none of the mentioned |
| Answer» B. terminal voltage vs field current at constant armature current | |