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
equal to 40°C
less-than 40°C
greater than 40°C

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Highway Engineering
When the speed of traffic flow becomes zero,then

traffic density and traffic volume both attain maximum value
traffic density becomes zero whereas traffic volume attains maximum value
traffic density and traffic volume both become zero
traffic density attains maximum value whereas traffic volume becomes zero

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