Question:
Surface miner does NOT have a
Surface miner does NOT have a
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Any machine that moves on crawlers does not need a differential gear—turning is achieved by track speed variation.
Updated On: Dec 26, 2025
- differential gear for turning.
- tensioning arrangement for crawler.
- scraper plate behind the drum.
- pick cooling system.
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The Correct Option is A
Solution and Explanation
A surface miner is a crawler-mounted machine used for continuous surface excavation. Since it runs on tracks (crawlers) instead of wheels, its turning mechanism is achieved by varying crawler speeds, not by a differential gear. A differential gear is a mechanical device required only in wheeled vehicles to allow smooth turning by distributing torque between the wheels.
Surface miners do have several essential components:
1. A scraper plate behind the cutting drum, used to remove loosened material.
2. A crawler tensioning arrangement to maintain proper track tension.
3. Pick cooling systems in advanced machines to prevent tool overheating.
Because a differential gear plays no role in crawler-based movement, it is the only component that a surface miner does not have.
Surface miners do have several essential components:
1. A scraper plate behind the cutting drum, used to remove loosened material.
2. A crawler tensioning arrangement to maintain proper track tension.
3. Pick cooling systems in advanced machines to prevent tool overheating.
Because a differential gear plays no role in crawler-based movement, it is the only component that a surface miner does not have.
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