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49.

Percentage of free carbon in bitumen is

A.	more than that in tar	B.	less than that in tar
C.	equal to that in tar	D.	none of the above

50.

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

A.	same viscosity	B.	viscosity in increasing order from RC-2 to SC-2
C.	viscosity in decreasing order from RC-2 to SC-2	D.	none of the above

51.

Reaction time of a driver

A.	increases with increase in speed	B.	decreases with increase in speed
C.	is same for all speeds	D.	none of the above

52.

Scientific planning of transportation system and mass transit facilities in cities should be based on

A.	spot speed data	B.	origin and destination data
C.	traffic volume data	D.	accident data

53.

Select the correct statement.

A.	Psychological extra widening depends on the number of traffic lanes.	B.	Mechanical extra widening depends on the speed of vehicle.
C.	Psychological extra widening depends on the length of wheel base.	D.	Psychological extra widening depends on the speed of vehicle.

54.

Select the correct statement.

A.	Traffic volume should always be more than traffic capacity.	B.	Traffic capacity should always be more than traffic volume.
C.	Spot speed is the average speed of a vehicle at a specified section.	D.	85th percentile speed is more than 98th percentile speed.

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