Highway Engineering
Softening point of bitumen to be used for read construction at a place where maximum temperature is 40° C should be

None of these
less-than 40°C
equal to 40°C
greater than 40°C

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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 also less than co-efficient of lateral friction
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

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Highway Engineering
For a constant value of coefficient of lateral friction, the value of required super-elevation increases with

decrease in both speed and radius of curve
decrease in speed and with increase in radius of curve
increase in speed and with decrease in radius of curve
increase in both speed and radius of curve

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