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Hard, rough and durable granite stone ballast _________ gauge, shall be used.(a) 100 mm(b) 20 mm(c) 1mm(d) 60mm |
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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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