Heavy Equipment Operator Certification Exam Prep · Question
What is the primary function of a 'carry scraper' versus a 'push-pull scraper'?
Carry scrapers (or towed scrapers) are non-powered units towed by a tractor. Push-pull scrapers are self-propelled (usually twin-engine) and are designed to wor
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Question: What is the primary function of a 'carry scraper' versus a 'push-pull scraper'?
Answer options:
- Carry scrapers are for fine grading, push-pull are for rough grading. ✅ Carry scrapers are towed by a separate prime mover, push-pull scrapers are self-propelled and can work in tandem.
- Carry scrapers primarily load sand, push-pull scrapers load rock.
- Carry scrapers can only dump backwards, push-pull can side-dump.
Correct answer: Carry scrapers are towed by a separate prime mover, push-pull scrapers are self-propelled and can work in tandem.
Explanation: Carry scrapers (or towed scrapers) are non-powered units towed by a tractor. Push-pull scrapers are self-propelled (usually twin-engine) and are designed to work in tandem units where one scraper uses its engine to push the other, allowing them to load efficiently without external push assistance.
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