Belt drives: when is an open belt drive used? Assume parallel shafts and standard flat/V-belt arrangements. Identify the shaft rotation condition that requires an open belt. Choose the correct option.
Mechanical Engineering
Machine Design
Difficulty: Easy
Choose an option
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AParallel shafts rotating in opposite directions
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BParallel shafts rotating in the same direction
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CShafts at right angles, one definite direction
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DIntermittent start/stop of driven shaft without affecting driver
Answer
Correct Answer: Parallel shafts rotating in the same direction
Explanation
ConceptOpen belt layouts are used when both pulleys must rotate in the same direction. A crossed belt reverses rotation (opposite directions).
Why option (b)With parallel shafts and an open wrap, the belt does not cross; thus driving and driven pulleys rotate identically.
Final AnswerParallel shafts rotating in the same direction