Which of the following serves as an example of a higher pair_________________?
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Answer: D. all of the above
Explanation
Gears, cams, belt drives, and rolling element bearings all feature point or line contact between working surfaces. These concentrated contact interfaces classify all these common mechanical elements as higher kinematic pairs. Higher pairs transmit motion through localized surface interactions rather than broad area sliding contact. Higher pairs provide compact designs capable of transmitting complex motion paths between machine parts. Hertzian contact stress theory is used to analyze high localized forces acting on higher pair interfaces. Hardened alloy steels are typically required for higher pair components to resist pitting and surface fatigue.
Automotive transmissions use gear teeth and roller bearings, which are classic examples of higher pairs. Cams and followers in engine valve trains rely on high contact pressures to actuate valves rapidly. Proper lubrication is critical in higher pairs to prevent scoring and wear under extreme contact loads. Some listed options include lower pairs, but the comprehensive answer encompasses all valid higher pair devices. Excluding gears or cams would ignore major categories of higher kinematic pairs used in engineering. Stating none of the above is incorrect because multiple valid higher pair examples are present.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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