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Steam Nozzles and Turbines - Data Intensity 1 Multiple Questions and Answers.
| 16. | When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be | ||
| A. | choked | ||
| B. | underdamping | ||
| C. | overdamping | ||
| D. | none of these | ||
| 17. | The ratio of the workdone on the blades to the energy supplied to the blades, is called | ||
| A. | blading efficiency | ||
| B. | nozzle efficiency | ||
| C. | gross or stage efficiency | ||
| D. | mechanical efficiency | ||
| 18. | The discharge is __________ at critical pressure. | ||
| A. | zero | ||
| B. | minimum | ||
| C. | maximum | ||
| D. | none of above | ||
| 19. | The supersaturated flow of steam through a nozzle as compared to a stable flow, the available heat drop | ||
| A. | remains the same | ||
| B. | increases | ||
| C. | decreases | ||
| D. | is unpredictable | ||
| 20. | The steam leaves the nozzle at a | ||
| A. | high pressure and a low velocity | ||
| B. | high pressure and a high velocity | ||
| C. | low pressure and a low velocity | ||
| D. | low pressure and a high velocity | ||
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