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________________ are usually mounted on two or four pneumatic tyred wheels.

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________________ are usually mounted on two or four pneumatic tyred wheels.

(a) Scraper

(b) Backactor

(c) Elevator

(d) Escalator

This question was posed to me in my homework.

This is a very interesting question from Excavating Equipments topic in division Construction Equipments of Construction & Building Materials

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The correct choice is (a) Scraper

Easiest explanation: An apron is provided in front of the container which opens and close in order to regulate the flow of earth in and out of the container. Scrapers are capable of producing a very smooth and accurate formation level.

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