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Highway Cross-sectional Elements - IES Previous Year Questions

1. Consider the following types of roads in the same rainfall region:

  1. Water Bound Macadam roads
  2. Cement Concrete roads
  3. Bituminous high-speed roads
  4. Gravel roads

The correct sequence of the ascending order of steepness of camber of these roads is _____ .

[IES 1995]

  1. 4, 1, 3, 2
  2. 1, 4, 3, 2
  3. 1, 4, 2, 3
  4. 4, 1, 2, 3

2. A vehicle was stopped in two seconds by fully jamming the brakes. The skid marks measured 9.8 meters. The average skid resistance coefficient will be _____ .

[IES 1997]

  1. 0.7
  2. 0.5
  3. 0.4
  4. 0.25

3.  Brake is applied on a vehicle which then skids a distance of 16 m before coming to stop. If the developed average coefficient of friction between the tyres and the pavement is 0.4, then the speed of the vehicle before skidding have been nearly _____ .

[IES 1999]

  1. 20 kmph
  2. 30 kmph
  3. 40 kmph
  4. 50 kmph

4.  Assertion (A): Worn out (smooth) tyres offer higher friction factors on dry pavements than new tyres with treads well intact.

Reason (R): Reduced pneumatic pressure is held in tubes which carry smooth tyres over them.

[IES 2010]

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true but R is not a correct explanation of A.
  3. A is true but R is false. 
  4. A is false but R is true.

5.  Match List-I with List-II and select the correct answer using the code given below the lists:

List-I

  1. Lateral friction
  2. Cut-off lagoons
  3. Skid
  4. Sight distance

List-II

  1. Disparity between relevant travel distances
  2. Vehicle movement on a curve
  3. Summit curves
  4. Prevention of flooding

[IES 2011]

Codes: A B C D

  1.  2  1  4  3
  2.  3  1  4  2
  3.  2  4  1  3
  4.  3  4  1  2

6.  Assertion (A): IRC has recommended a minimum coefficient of friction in the longitudinal direction on wet pavements after allowing a suitable factor of safety in the range 0.15 – 0.30.

Reason (R): When the longitudinal coefficient of friction of 0.40 is allowed for stopping the vehicle, the resultant retardation is 3.93 m/sec2.

[IES 2011]

  1. Both A and R are true and R is the correct explanation of A.
  2. Both A and R are true and R is not a correct explanation of A.
  3. A is true but R is false.
  4. A is false but R is true.

7.  What is the value of the resultant retardation in m/s2 when a longitudinal friction coefficient of 0.4 is allowed for stopping the vehicle on road ?

[IES 2013]

  1. 0.98
  2. 1.95
  3. 2.93
  4. 3.93

8.  If a vehicle travelling at 40 kmph was stopped within 1.8 sec after the application of the brakes, then the average skid resistance coefficient is _____ .

[IES 2014]

  1. 0.63
  2. 0.73
  3. 0.83
  4. 0.93

9.  A four-lane divided highway, with each carriageway being 7.0 m wide, is to be constructed in a zone of high rainfall. In this stretch, the highway has a longitudinal slope of 3% and is provided with a camber of 2%. What is the hydraulic gradient on this highway in this stretch ?

[IES 2015]

  1. 4.0%
  2. 3.6%
  3. 4.5%
  4. 3.0%

10.  In an area of heavy rainfall, a State Highway of high-type bituminous surface with four lanes (14.0 m wide) is to be constructed. What will be the height of the crown of the road relative to the edges for a composite camber (i.e. middle half as parabola and the rest as straight lines) ?

[IES 2015]

  1. 14 cm
  2. 21 cm
  3. 28 cm
  4. 7 cm
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