Solve this multiple-choice question and choose the correct option.

ConceptThe primary aim of compounding is to reduce the temperature range within any single cylinder by spreading expansion across stages. This limits cylinder condensation and improves efficiency. About the other statements Sharing the overall expansion does lessen the per-cylinder expansion ratio (Option A), but the core aim is thermal (condensation control). Reduction in stroke length (Option B) is not a fundamental aim; it is design-dependent and not guaranteed. Final AnswerTo reduce the temperature range in each cylinder and thus reduce condensation

Aim of compounding in steam engines: identify the principal objective(s). Compounding splits the total expansion across multiple cylinders (HP→IP→LP) to improve performance. Choose the best statement describing the aim.

Mechanical Engineering Steam Boilers and Engines Difficulty: Easy

Choose an option

A

To reduce the ratio of expansion handled in each individual cylinder
B

To reduce the length of stroke for a given overall expansion
C

To reduce the temperature range in each cylinder and thus reduce condensation
D

All of the above

Answer

Correct Answer: To reduce the temperature range in each cylinder and thus reduce condensation

Explanation

ConceptThe primary aim of compounding is to reduce the temperature range within any single cylinder by spreading expansion across stages. This limits cylinder condensation and improves efficiency.

About the other statements

Sharing the overall expansion does lessen the per-cylinder expansion ratio (Option A), but the core aim is thermal (condensation control).
Reduction in stroke length (Option B) is not a fundamental aim; it is design-dependent and not guaranteed.

Final AnswerTo reduce the temperature range in each cylinder and thus reduce condensation