MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In a De-Laval nozzle expanding superheated steam from 10 bar to 0.1 bar, the pressure at the minimum cross-section (i. e. pressure at throat, ) will be |
| A. | 3.3 bar |
| B. | 5.46 bar |
| C. | 8.2 bar |
| D. | 9.9 bar |
| Answer» C. 8.2 bar | |
| 2. |
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos α, where α is the nozzle exit flow angle, if the |
| A. | blades are equiangular |
| B. | blade velocity coefficient is unity |
| C. | blades are equiangular and frictionless |
| D. | blade solidity is 0.65 |
| Answer» D. blade solidity is 0.65 | |
| 3. |
The critical pressure ratio is given by (where = Initial pressure of steam, and = Pressure of steam at throat or critical pressure) |
| A. | |
| B. | / |
| C. | / |
| D. | + |
| Answer» D. + | |