Civil Engineering Transportations MCQ-2

Civil Engineering Transportations MCQ-2

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

a) increase in both speed and radius of curve
b) decrease in both speed and radius of curve
c) increase in speed and with decrease in radius of curve
d) decrease in speed and with increase in radius of curve
Ans: d

26. To calculate the minimum value of ruling radius of horizontal curves in plains, the design speed is given by
a) 8 kmph
b) 12kmph
c) 16kmph
d) 20 kmph
Ans: c

27. The absolute minimum radius of curve for safe operation for a speed of 110 kmph is
a) 110 m
b) 220 m
c) 440 m
d) 577 m
Ans: c

28. The attainment of superelevation by rotation of pavement about the inner edge of the pavement
a) is preferable in steep terrain
b) results in balancing the earthwork
c) avoids the drainage problem in flat terrain
d) does not change the vertical align-ment of road
Ans: c

29. 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.
Ans: d

30. In case of hill roads, the extra widening is generally provided
a) equally on inner and outer sides of the curve
b) fully on the inner side of the curve
c) fully on the outer side of the curve
d) one-fourth on inner side and three-fourth on outer side of the curve
Ans: b

32. The transition curve used in the horizontal alignment of highways as per IRC recommendations is
a) spiral
b) lemniscate
c) cubic parabola
d) any of the above
Ans: a

33. For design, that length of transition curve should be taken which is
a) based on allowable rate of change of centrifugal acceleration
b) based on rate of change of superele-vation
c) higher of (a) and (b)
d) smaller of (a) and (b)
Ans: c

34. The maximum design gradient for vertical profile of a road is
a) ruling gradient
b) limiting gradient
c) exceptional gradient
d) minimum gradient
Ans: a

35. The percentage compensation in gradient for ruling gradient of 4% and horizontal curve of radius 760 m is
a) 0.1 %
b) 1 %
c) 10%
d) no compensation
Ans: d

36. If ruling gradient is I in 20 and there is also a horizontal curve of radius 76 m, then the compensated grade should be
a) 3 %
b) 4%
c) 5 %
d) 6%
Ans: b

37. The camber of road should be approximately equal to
a) longitudinal gradient
b) two times the longitudinal gradient
c) three times the longitudinal gradient
d) half the longitudinal gradient
Ans: d

38. Which of the following shapes is preferred in a valley curve ?
a) simple parabola
b) cubic parabola
c) spiral
d) lemniscate
Ans: b

39. The value of ruling gradient in plains as per IRC recommendation is
a) 1 in 12
b) 1 m 15
c) 1 in 20
d) 1 in 30
Ans: d

40. In case of summit curves, the deviation angle will be maximum when
a) an ascending gradient meets with another ascending gradient
b) an ascending gradient meets with a descending gradient
c) a descending gradient meets with another descending gradient
d) an ascending gradient meets with a level surface
Ans: b

41. If the design speed is V kmph and deviation angle is N radians, then the total length of a valley curve in metres is given by the expression
a) 0.38 N V3/2
b) 0.38 (NV3)"2
c) 3.8 NV"2
d) 3.8 (NV3)"2
Ans: b

42. If an ascending gradient of 1 in 50 meets a descending gradient of 1 in 50, the length of summit curve for a stopping sight distance of 80 m will be
a) zero
b) 64m
c) 80m
d) 60m
Ans: d

43. Highway facilities are designed for
a) annual average hourly volume
b) annual average daily traffic
c) thirtieth highest hourly volume
d) peak hourly volume of the year
 Ans: c

44. Enoscope is used to find
a) average speed
b) spot speed
c) space-mean speed
d) time-mean speed
Ans: b

45. For highway geometric design purposes the speed used is
a) 15th percentile
b) 50 ""percentile
c) 85th percentile
d) 98 ""percentile
Ans: d

46. 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.
Ans: b

47. Length of a vehicle affects
a) width of traffic lanes
b) extra width of pavement and minimum turning radius
c) width of shoulders and parking facilities
d) clearance to be provided under structures such as overbridges, under-bridges etc.
Ans: b

48. The maximum width of a vehicle as recommended by IRC is
a) 1.85m
b) 2.44 m
c) 3.81 m
d) 4.72 m
Ans: b

49. Desire lines are plotted in
a) traffic volume studies
b) speed studies
c) accident studies
d) origin and destination studies
Ans: d

50. Which of the following methods is preferred for collecting origin and destination data for a small area like a mass business centre or a large intersection ?
a)   road side interview method
b) license plate method
c) return postcard method
d) home interview method
Ans: b

52. The diagram which shows the approximate path of vehicles and pedestrians involved in accidents is known as
a) spot maps
b) pie charts
c) condition diagram
d) collision diagram
Ans: d

53. With increase in speed of the traffic stream, the minimum spacing of vehicles
a) increases
b) decreases
c) first decreases and then increases after reaching a minimum value at optimum speed
d) first increases and then decreases after reaching a maximum value at optimum speed
Ans: a

55. Which of the following is known as design capacity ?
a) basic capacity
b) theoretical capacity
c) possible capacity
d) practical capacity
Ans: a

56. If the average centre to centre spacing of vehicles is 20 metres, then the basic
capacity of a traffic lane at a speed of 50 kmph is
a) 2500 vehicles per day
b) 2000 vehicles per hour
c) 2500 vehicles per hour
d) 1000 vehicles per hour
Ans: c

57. With increase in speed of the traffic stream, the maximum capacity of the lane
a) increases
b) decreases
c) first increases and then decreases after reaching a maximum value at optimum speed
d) first decreases and then increases after reaching a minimum value at optimum speed
Ans: c

58. Equivalent factor of passenger car unit (PCU) for a passenger car as per IRC is
a) 1.0
b) 2.0
c) 0.5
d) 10
Ans: a