Highway Engineering
Group index method of design of flexible pavement is

An empirical method based on strength characteristics of sub-grade soil
An empirical method based on physical properties of sub-grade soil
A semi empirical method
A theoretical method

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Highway Engineering
For the construction of water bound macadam roads, the correct sequence of operations after spreading coarse aggregates is

dry rolling, application of screening, wet rolling and application of filler
dry rolling, application of screening, application of filler and wet rolling
dry rolling, application of filler, wet rolling and application of screening
dry rolling, wet rolling, application of screening and application of filler

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Highway Engineering
If b is the wheel track of a vehicle and h is the height of centre of gravity above road surface, then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should always be

less than b/2h and greater than co-efficient of lateral friction
greater than b/2h and also greater than coefficient of lateral friction
greater than b/2h and less than co-efficient of lateral friction
less than b/2h and also less than co-efficient of lateral friction

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