MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
The airfoil/curve blade designs are affected by drag along its length. |
| A. | False |
| B. | True |
| Answer» C. | |
| 2. |
Which of the following blade designs is becoming less popular? |
| A. | HAWT |
| B. | Airfoil design |
| C. | Curve design |
| D. | Flat blade design |
| Answer» E. | |
| 3. |
What does tip speed ratio (TSR) depend on? |
| A. | Motor material |
| B. | Wind tower material |
| C. | Rotor blade shape profile |
| D. | Different types of gases |
| Answer» D. Different types of gases | |
| 4. |
What is tip speed ratio (TSR)? |
| A. | Ratio of wind speed to the speed of rotor |
| B. | Ratio of the speed of rotor tip to wind speed |
| C. | Ratio of wind speed to the speed of rotor tip |
| D. | Ratio of wind speed to the speed of the blade s center |
| Answer» C. Ratio of wind speed to the speed of rotor tip | |
| 5. |
Why is it necessary to have an optimal tip speed ratio (TSR)? |
| A. | To ensure maximum efficiency |
| B. | To ensure good aerodynamics |
| C. | To increase drag |
| D. | To ensure minimum efficiency but good aerodynamics |
| Answer» B. To ensure good aerodynamics | |
| 6. |
Which of the following is the governing equation for power extraction and calculation? Note that the text in bold denotes a vector quantity. |
| A. | Power = <strong>force . velocity</strong> |
| B. | Power = <strong>force . area</strong> |
| C. | Power = <strong>velocity . force</strong> |
| D. | Power = <strong> energy / time</strong> |
| Answer» B. Power = <strong>force . area</strong> | |
| 7. |
Turbine blades use a/an _______ design. |
| A. | bulky |
| B. | airfoil |
| C. | teardrop |
| D. | train s |
| Answer» C. teardrop | |
| 8. |
A higher lift-to-drag ratio indicates a higher efficiency. |
| A. | False |
| B. | True |
| Answer» C. | |
| 9. |
What is lift-to-drag ratio? |
| A. | Amount of lift generated by a blade divided by its aerodynamic drag |
| B. | Amount of drag generated by a blade divided by its lift |
| C. | Amount of drag generated by a blade divided by its aerodynamic lift |
| D. | Amount of lift generated by a blade divided by its aerodynamic drag |
| Answer» B. Amount of drag generated by a blade divided by its lift | |
| 10. |
The upwind side experiences a force that slows the blade. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 11. |
What happens on the upwind side of the wind mill blade? |
| A. | No pressure is exerted |
| B. | Low pressure area |
| C. | High pressure area |
| D. | Wind is trapped |
| Answer» D. Wind is trapped | |
| 12. |
What is an aerodynamic force? |
| A. | Force exerted on the body due to mass of another body nearby |
| B. | Force exerted on the body by liquid |
| C. | Force exerted on the body by air (or any gas) in which the body is immersed |
| D. | Force exerted on the body due to a charged particle |
| Answer» D. Force exerted on the body due to a charged particle | |
| 13. |
Drag is an aerodynamic force acting ______ |
| A. | perpendicular to the direction of wind flow |
| B. | parallel to the direction of wind flow |
| C. | diagonal to the direction of wind flow |
| D. | opposite to the direction of wind flow |
| Answer» C. diagonal to the direction of wind flow | |
| 14. |
Lift is an aerodynamic force acting _______ |
| A. | opposite to the direction of wind flow |
| B. | parallel to the direction of wind flow |
| C. | diagonal to the direction of wind flow |
| D. | perpendicular to the direction of wind flow |
| Answer» E. | |
| 15. |
What are the two primary aerodynamic forces acting on wind turbine rotors? |
| A. | Lift, drag |
| B. | Drag, gravitational force |
| C. | Gravitational force, lift |
| D. | Gravitational force, electrical force |
| Answer» B. Drag, gravitational force | |