Mechanical Engineering - Steam Nozzles and Turbines

Exercise :: Steam Nozzles and Turbines - Section 3

16. 

In pressure compounding of an impulse turbine, the total pressure drop of the steam does not take place in the first nozzle ring, but is divided equally among all the nozzle rings.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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17. 

When the cross-section of a nozzle __________ continuously from entrance to exit, it is called a convergent nozzle.

A. increases
B. decreases

Answer: Option B

Explanation:

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18. 

In an ideal impulse turbine, the

A. absolute velocity at the inlet of moving blade is equal to that at the outlet
B. relative velocity at the inlet of the moving blade is equal to that at the outlet
C. axial velocity at inlet is equal to that at the outlet
D. whirl velocity at inlet is equalto that at the outlet

Answer: Option B

Explanation:

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19. 

During flow through a nozzle, no heat is supplied or rejected by the steam.

A. Agree
B. Disagree

Answer: Option A

Explanation:

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20. 

In a reaction turbine, when steam flows through the moving blades,

A. pressure increases while velocity decreases
B. pressure decreases while velocity increases
C. pressure and velocity both decreases
D. pressure and velocity both increases

Answer: Option C

Explanation:

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