Mechanical Engineering - Steam Nozzles and Turbines
Exercise :: Steam Nozzles and Turbines - Section 2
| 46. |
When the nozzle operates with the maximum mass flow, the nozzle is said to be |
| A. |
choked | | B. |
underdamping | | C. |
overdamping | | D. |
none of these |
Answer: Option A
Explanation:
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| 47. |
In a velocity compounded impulse turbine, when steam flows through the second row of moving blades, |
| A. |
velocity increases | | B. |
velocity decreases | | C. |
velocity remains constant | | D. |
pressure remains constant |
Answer: Option B
Explanation:
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| 48. |
The ratio of the energy supplied to the blades per kg of steam to the total energy supplied per stage per kg of steam is called mechanical efficiency. |
Answer: Option B
Explanation:
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| 49. |
A steam nozzle converts |
| A. |
heat energy of steam into kinetic energy | | B. |
kinetic energy into heat energy of steam | | C. |
heat energy of steam into potential energy | | D. |
potential energy into heat energy of steam |
Answer: Option A
Explanation:
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| 50. |
The maximum discharge of steam through a convergent-divergent nozzle depends upon |
| A. |
area of nozzle at throat | | B. |
initial pressure and volume of steam | | C. |
final pressure ofsteam leaving the nozzle | | D. |
both (a) and (b) |
Answer: Option D
Explanation:
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