Mechanical Engineering - Steam Nozzles and Turbines
Exercise :: Steam Nozzles and Turbines - Section 2
6. |
De-Laval turbine is a |
A. |
simple impulse turbine | B. |
simple reaction turbine | C. |
impulse-reaction turbine | D. |
none of these |
Answer: Option A
Explanation:
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7. |
The impulse turbine rotor efficiency will have a maximum value of 0.5 cos2 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: Option C
Explanation:
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8. |
When the cross-section of a nozzle increases continuously from entrance to exit, it is called a |
A. |
divergent nozzle | B. |
convergent nozzle | C. |
convergent-divergent nozzle | D. |
none of these |
Answer: Option A
Explanation:
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9. |
Rateau turbine is |
A. |
simple reaction turbine | B. |
velocity compounded turbine | C. |
pressure compounded turbine | D. |
pressure-velocity compounded turbine |
Answer: Option C
Explanation:
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10. |
The ratio of the work delivered at the turbine shaft to the heat supplied is called overall thermal efficiency of turbine. |
Answer: Option A
Explanation:
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