Mechanical Engineering - Steam Boilers and Engines - Discussion

9. 

Which of the following statement is correct for a compound steam engine ?

[A]. The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
[B]. The forces in the working parts are increased as the forces are distributed over more parts.
[C]. The ratio of expansion is reduced, thus reducing the length of stroke.
[D]. The temperature range per cylinder is increased, with corresponding increase in condensation.

Answer: Option C

Explanation:

No answer description available for this question.

Balu said: (Aug 24, 2017)  
It seems given answer is correct.

'The complete expansion of the steam occurs across multiple cylinders and, as there is less expansion in each cylinder, less heat is lost by the steam in each. This reduces the magnitude of cylinder heating and cooling, making higher expansion ratios practical and increasing the efficiency of the engine".

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