Which of the following does not qualify as an earth-excavating and hauling machine ?
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Answer: D. Dump truck
Explanation
A dump truck is primarily classified as a hauling or transport vehicle rather than an excavator. Excavating machines dig and load earth, whereas dump trucks transport materials across sites. Earthmoving fleets combine excavators for digging with dump trucks for material hauling. Earthmoving operations involve excavation, loading, hauling, dumping, and compacting soil. Excavators include shovels, hoes, draglines, and bulldozers equipped with cutting blades. Hauling units are designed specifically for high-capacity material transport over haul roads.
Contractors select specialized excavators based on soil conditions and trench depth requirements. Dump truck fleet sizing depends on excavator cycle times and haul road distance parameters. Proper equipment pairing maximizes productivity and lowers unit costs on civil earthworks. Option A is a valid excavating machine that pushes and cuts earth using a front blade. Option B is an excavating crane attachment used for vertical digging in confined spaces. Option C is a self-propelled earth-excavating and hauling machine combined into one unit.
- Subject
- Engineering
- Category
- Civil Engineering
- Topic
- —
- Difficulty
- medium
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