Mechanical Engineering - Steam Nozzles and Turbines - Discussion


For maximum efficiency of an impulse turbine, the steam should leave the blades at right angles to their motion.

[A]. Correct
[B]. Incorrect

Answer: Option A


No answer description available for this question.

Saisrinivas said: (Jun 16, 2017)  
How it is possible?

For max efficiency= (1+cos(θ)/2.
Then max efficiency is at θ = 0 degrees,
Therefore given statement is incorrect.

Vipul Kumar said: (Oct 18, 2017)  
YES, EFFICIENCY IS MAXIMUM FOR 180-degree deflection of incident beam for or theta=0 in above-mentioned formula, given answer is wrong.

Basant said: (Mar 29, 2018)  

Max. Efficiency=cos^2* α
For this to be max. Alpha should be 0°

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