How is the angle of action for a cam mechanism defined____________________?
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Answer: E. moved by the cam from beginning of ascent to the termination of descent
Explanation
The total angle of action of a cam is the cam rotation angle from the very beginning of the follower's ascent to the final termination of its descent. This comprehensive angular measurement encompasses rise, dwell, and return phases of the cam operating cycle. Cam designers specify the angle of action to coordinate valve timing events in internal combustion engines accurately. Cam mechanisms transform rotational motion into translating or oscillating follower motion using profiled cams. Cam rotation angles dictate the kinematic timing of machinery operations during each complete machine cycle. Follower displacement profiles are mapped against cam rotation angles to ensure smooth acceleration and deceleration.
Option A describes only the return stroke portion rather than the complete ascent and descent action. Option B refers to specific follower displacement intervals without encompassing the entire active operational cycle. Option C defines the dwell period where the follower remains stationary at its highest lifted position.
- Subject
- Engineering
- Category
- Mechanical Engineering
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- —
- Difficulty
- medium
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