MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Hydraulic Machines knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Pelton wheel if angle of deflection is not mentioned then we assume it as______________ |
| A. | 150 degrees |
| B. | 200 degrees |
| C. | 165 degrees |
| D. | 185 degrees |
| Answer» D. 185 degrees | |
| 2. |
In Pelton wheel, relative inlet velocity of jet with respect to velocity of vane is _____________ |
| A. | Difference between inlet jet velocity and blade velocity |
| B. | Sum of inlet jet velocity and blade velocity |
| C. | Inlet jet velocity |
| D. | Blade velocity |
| Answer» B. Sum of inlet jet velocity and blade velocity | |
| 3. |
In Pelton wheel, if outlet velocity angle of jet is “right angled” then outlet whirl velocity of jet is __________ |
| A. | x- component of V (r2) – blade velocity |
| B. | x- component of V (r2) + blade velocity |
| C. | Blade velocity – x- component of V (r2) |
| D. | Zero |
| Answer» E. | |
| 4. |
In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is _____________ |
| A. | x- component of V (r2) – blade velocity |
| B. | x- component of V (r2) + blade velocity |
| C. | Blade velocity – x- component of V (r2) |
| D. | Zero |
| Answer» D. Zero | |
| 5. |
In Pelton wheel, if outlet velocity angle of jet is “acute angled” then outlet whirl velocity of jet is ______________ |
| A. | x- component of V(r2) – blade velocity |
| B. | x- component of V (r2) + blade velocity |
| C. | Blade velocity – x- component of V (r2) |
| D. | Zero |
| Answer» B. x- component of V (r2) + blade velocity | |
| 6. |
IN_PELTON_WHEEL,_RELATIVE_INLET_VELOCITY_OF_JET_WITH_RESPECT_TO_VELOCITY_OF_VANE_IS______________?$ |
| A. | Difference between inlet jet velocity and blade velocity |
| B. | Sum of inlet jet velocity and blade velocity |
| C. | Inlet jet velocity |
| D. | Blade velocity |
| Answer» B. Sum of inlet jet velocity and blade velocity | |
| 7. |
In_Pelton_wheel_if_angle_of_deflection_is_not_mentioned_then_we_assume_it_as______________$ |
| A. | 150 degrees |
| B. | 200 degrees |
| C. | 165 degrees |
| D. | 185 degrees |
| Answer» D. 185 degrees | |
| 8. |
In Pelton wheel, if outlet velocity angle of jet is “right angled” then outlet whirl velocity of jet is _________?# |
| A. | x- component of V (r2) – blade velocity |
| B. | x- component of V (r2) + blade velocity |
| C. | Blade velocity – x- component of V (r2) |
| D. | Zero |
| Answer» E. | |
| 9. |
In Pelton wheel, if outlet velocity angle of jet is “obtuseangled” then outlet whirl velocity of jet is _____________$ |
| A. | x- component of V (r2) – blade velocity |
| B. | x- component of V (r2) + blade velocity |
| C. | Blade velocity – x- component of V (r2) |
| D. | Zero |
| Answer» D. Zero | |
| 10. |
In Pelton wheel, if outlet velocity angle of jet is “acute angled” then outlet whirl velocity of jet is ______________$ |
| A. | x- component of V(r2) – blade velocity |
| B. | x- component of V (r2) + blade velocity |
| C. | Blade velocity – x- component of V (r2) |
| D. | Zero |
| Answer» B. x- component of V (r2) + blade velocity | |
| 11. |
In which of following turbine inlet whirl velocity and inlet jet velocity are equal in magnitude? |
| A. | Pelton turbine |
| B. | Propeller turbine |
| C. | Kaplan turbine |
| D. | Francis turbine |
| Answer» B. Propeller turbine | |
| 12. |
The value of coefficient of velocity is _____________ |
| A. | 0.98 |
| B. | 0.65 |
| C. | 0.85 |
| D. | 0.33 |
| Answer» B. 0.65 | |
| 13. |
Tangential velocity of blade of Pelton wheel is proportional to ____________ |
| A. | Speed of wheel |
| B. | Angular velocity of wheel |
| C. | Rpm of wheel |
| D. | Speed, angular velocity, RPM of the wheel |
| Answer» B. Angular velocity of wheel | |
| 14. |
In which of following turbine inlet and outlet blade velocities of vanes are equal? |
| A. | Francis turbine |
| B. | Kaplan turbine |
| C. | Pelton turbine |
| D. | Propeller turbine |
| Answer» D. Propeller turbine | |
| 15. |
Velocity triangles are used to analyze ____________ |
| A. | Flow of water along blades of turbine |
| B. | Measure discharge of flow |
| C. | Angle of deflection of jet |
| D. | Flow of water, measure of discharge, angle of deflection. |
| Answer» E. | |