Design bases for sizing cylinders in a compound steam engine Identify valid design bases commonly used for selecting cylinder sizes in compound engines. Choose the most comprehensive answer.
Mechanical Engineering
Steam Boilers and Engines
Difficulty: Easy
Choose an option
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AEqual power developed in each cylinder for uniform turning moment
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BEqual initial piston loads on all pistons so common sizes of piston rod/connecting rod can be used
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CEqual temperature drop in each cylinder for thermodynamic economy
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DAll of the above
Answer
Correct Answer: All of the above
Explanation
Concept
- Compound engines can be proportioned using different (but valid) criteria, depending on the performance objective.
Common bases
- Equal power per cylinder → smoother torque.
- Equal initial piston loads → standardisation of mechanical parts.
- Equal temperature drops → better thermal efficiency and reduced condensation losses.
Final AnswerAll of the above.