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Hard, rough and durable granite stone ballast _________ gauge, shall be used.(a) 100 mm(b) 20 mm(c) 1mm(d) 60mmThe question was posed to me during an interview.I need to ask this question from General Specifications of Modern Road topic in chapter Specifications, Estimation of Quantities of Materials and Transport of Civil Engineering Drawing

Answer»

Correct CHOICE is (d) 60mm

The explanation: Ballast should not ABSORB WATER and should not be affected by weather action and shall be clean and free from dust, dirt, etc. Ballast should be stacked 30 CM high on the levelled side-berm of the road in a continuous stack along the road having the section as required per metre LENGTH of the road.



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