Highway Engineering Questions (h5)

In this post, I will share some important questions which are frequently asked in competitive examinations such as SSC, UPSC and state PSCs.



  1. What is the ruling design speed of National Highway in the rolling plain?


    1. 100 kmph
    2. 80 kmph
    3. 65 kmph
    4. 50 kmph

    View Answer
    Answer: b

  2. The cross-slope of plain terrain is ...


    1. 0 to 10 per cent
    2. 10 to 25 per cent
    3. 25 to 65 per cent
    4. greater than 65 per cent

    View Answer
    Answer: a

  3. The width and height of the centre of gravity of a vehicle negotiating a horizontal curve are $"b"$ and $"h"$ respectively. $"\mu"$ is the coefficient of friction between the road surface and the wheels. If the radius of the curve is low and the speed of the vehicle is high, it would skid before overturn when ...


    1. $b/2h > \mu$
    2. $b/h < \mu$
    3. $b/h > \mu$
    4. $b/2h < \mu$

    View Answer
    Answer: a
    The vehicle would skid not overturn if $b/2h > \mu$ i.e., when $\mu$ is less than $b/2h$ and the vehicle would overturn before skidding if $b/2h < \mu$

  4. To counteract the effect of centrifugal force at a horizontal curve, we provide ...


    1. superelevation
    2. cant
    3. banking
    4. all of the above

    View Answer
    Answer: d

  5. If a road surface is adequately superelevated on a horizontal curve, which one of the following is the proper distribution of pressure on the vehicle wheels?


    1. Pressure on the inner wheel is more than that of the outer wheel
    2. Pressure on the front wheel is more than that of the rear wheel
    3. Pressure on both outer and inner wheels is equal
    4. Pressure on the inner wheel is less than that of the outer wheel

    View Answer
    Answer: c
    If the road surface is kept horizontal across the alignment, the pressure on the outer wheels will be higher due to centrifugal force acting outwards and hence the reaction at the outer wheel would be higher. In order to counteract this centrifugal force and to reduce the tendency of the vehicle to overturn or skid superelevation is provided.

  6. If superelevation is not provided on a horizontal curve of a highway, then portholes are likely to develop on ...


    1. The inner edge of the road
    2. Centre of the road
    3. Shoulder of the road
    4. The outer edge of the road

    View Answer
    Answer: d

  7. The correct expression for superelevation is ...


    1. $e+f=\frac{v^2}{gR}$
    2. $e-f=\frac{v^2}{gR}$
    3. $e+f=\frac{v^2}{2gR}$
    4. $e+f=\frac{v}{gR}$

    View Answer
    Answer: a

  8. The expression for Equilibrium Superelevation is ...


    1. $e+f=\frac{v^2}{gR}$
    2. $e=\frac{v^2}{gR}$
    3. $e=\frac{v^2}{2gR}$
    4. $f=\frac{v}{gR}$

    View Answer
    Answer: b

  9. As per IRC, what is the maximum limit of superelevation in snow bound rolling terrains?


    1. 5 %
    2. 6 %
    3. 7 %
    4. 10 %

    View Answer
    Answer: c

  10. The design speed and camber are 60 KMPH and 3 % respectively. What is the minimum radius of horizontal curve beyond which superelevation is not required?


    1. 1100 m
    2. 950 m
    3. 700 m
    4. 620 m

    View Answer
    Answer: d
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