Piston rod function: identify the correct role in a reciprocating steam engine. Select the statement that correctly describes the function of a piston rod.
Mechanical Engineering
Steam Boilers and Engines
Difficulty: Easy
Choose an option
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ATo guide motion of the piston rod and prevent it from bending
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BTo transfer motion from the piston to the crosshead
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CTo convert the heat energy of steam directly into mechanical work
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DTo exhaust steam from the cylinder at the proper moment
Answer
Correct Answer: To transfer motion from the piston to the crosshead
Explanation
ConceptThe piston rod connects the piston to the crosshead, transmitting reciprocating motion. Guidance and bending control are duties of the crosshead (Option A), energy conversion occurs in the cylinder by piston expansion work (Option C), and exhaust timing is controlled by the valve gear (Option D).
Final AnswerTo transfer motion from the piston to the crosshead