Construction Planning and Management
Wheeled tractors are replacing crawler tractors because1. Wheeled tractors travel faster.2. Crawler tractors are more expensive.3. Track parts of a crawler wear out quickly.4. Crawler tractors have stick control.of following statements

1, 2 and 3 are correct
1, 3 and 4 are correct
2, 3 and 4 are correct
1, 2 and 4 are correct

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Construction Planning and Management
Output of a bulldozer is(i) Increased if drawbar HP of the tractor is increased for a given hauling distance(ii) Decreased if drawbar HP of the tractor is increased for a given hauling distance(iii) Increased if the hauling distance is increased for a given drawbar HP of the tractor(iv) Decreased if the hauling distance is increased for a given drawbar HP of the tractor

(ii) and (iii) are correct
(i) and (iv) are correct
(ii) and (iv) are correct
(i) and (iii) are correct

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