MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Wind Energy knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Why is feathering of wind turbine blades required? |
| A. | To increase drag |
| B. | To reduce drag |
| C. | To prevent the blades from being destroyed by strong winds |
| D. | To extract power from strong winds originating from storms |
| Answer» D. To extract power from strong winds originating from storms | |
| 2. |
What is feather of wind turbine blades? |
| A. | Adding feathers to the blades |
| B. | Reducing the weight of wind turbine blades |
| C. | Reducing the angle of pitch |
| D. | Increasing the angle of pitch |
| Answer» E. | |
| 3. |
Higher air density leads to higher power output. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
Which of the following does the local air density depend upon? |
| A. | Soil |
| B. | Lightning |
| C. | Altitude and pressure |
| D. | Nitrogen and oxygen |
| Answer» D. Nitrogen and oxygen | |
| 5. |
Power output is not related to the local air density. |
| A. | False |
| B. | True |
| Answer» B. True | |
| 6. |
What is the cut-out speed? |
| A. | Wind turbine starts generating output power |
| B. | Wind turbine must be shut down |
| C. | Wind turbine stops functioning |
| D. | Wind turbine starts functioning but does not generate output power |
| Answer» C. Wind turbine stops functioning | |
| 7. |
How does the output power vary between cut-in speed and the rated speed? |
| A. | cubically |
| B. | linearly |
| C. | square |
| D. | exponential |
| Answer» B. linearly | |
| 8. |
Which of the following are the limits of the range of wind speeds for which the turbines are designed? |
| A. | Elasticity |
| B. | Threshold voltage |
| C. | Networking |
| D. | Cut-in speed and cut-out speed |
| Answer» E. | |
| 9. |
What is rated speed? |
| A. | Wind turbines generate least output power |
| B. | Wind turbines do not generate any output power |
| C. | Wind turbines generate maximum output power |
| D. | Wind turbines have no rated speed as the output power always increases |
| Answer» D. Wind turbines have no rated speed as the output power always increases | |
| 10. |
What is cut-in wind speed? |
| A. | Wind turbine stops generating output power |
| B. | Wind turbine starts generating output power |
| C. | Wind turbine stops functioning |
| D. | Wind turbine starts functioning |
| Answer» C. Wind turbine stops functioning | |
| 11. |
Higher wind speeds _________ the speed of rotation of the wind blades. |
| A. | increase |
| B. | decrease |
| C. | monotonically decrease |
| D. | first increase and then decrease |
| Answer» B. decrease | |
| 12. |
What happens to the output power when the wind turbine blades rotate faster for the entire operation time? |
| A. | The output power first increases then decreases |
| B. | The output power first decreases then monotonically increases |
| C. | The output power decreases |
| D. | The output power increases |
| Answer» E. | |
| 13. |
Lower wind speeds result in ________ |
| A. | higher wind energy obtained |
| B. | no wind energy obtained |
| C. | lower wind energy obtained |
| D. | 100% energy conversion for half the operation time and less than 10% energy conversion for the remaining half of the operation time |
| Answer» D. 100% energy conversion for half the operation time and less than 10% energy conversion for the remaining half of the operation time | |
| 14. |
What happens to wind speed when many turbines operate collectively? |
| A. | Wind speed reduces |
| B. | Wind speed increases |
| C. | Wind speed does not change |
| D. | Wind speed increases exponentially and then decreases linearly |
| Answer» B. Wind speed increases | |