Highway Engineering
RC-2, MC-2 and SC-2 correspond to

viscosity in increasing order from RC-2 to SC-2
None of these
same viscosity
viscosity in decreasing order from RC-2 to SC-2

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

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