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A _______________ Dredger essentially consist of sand pump which excavates and transport the bed material in one operation.

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A _______________ Dredger essentially consist of sand pump which excavates and transport the bed material in one operation.

(a) Hydraulic

(b) Skimmer

(c) Bucket ladder

(d) Grab

I had been asked this question in unit test.

This intriguing question originated from Earth Compaction Equipments topic in chapter Construction Equipments of Construction & Building Materials

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Correct choice is (a) Hydraulic

The explanation is: The suction pipe is provided at bottom with a cutter for hard material. This type of dredger is also known as suction dredger. A Hydraulic Dredger is unsuitable for open see where the height of sea waves exceeds 1200 mm.

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