Roads and Highways Geometric Design MCQ – Highway Engineering

The allowable rate of change of centrifugal acceleration for a highway with a design speed value of 70 km/hr is

  1. 0.81
  2. 0.55
  3. 0.67
  4. 0.50
Answer
Answer. b

A transition curve is to be provided for a circular railway curve of 300 m radius, the gauge being 1.5 m with the maximum super-elevation restricted to 15 cm. What is the length 0f transition curve for balancing the centrifugal force?

  1. 78.1 m
  2. 72.3 m
  3. 84.2 m
  4. 88.3 m
Answer
Answer. b

In highway construction on super-elevated curves, the rolling shall proceed from

  1. sides towards the centre
  2. centre towards the sides
  3. lower edge towards the upper edge
  4. upper edge towards the lower edge
Answer
Answer. c

The maximum safe speed on roads depends on the

  1. type of the highway
  2. type of the road surface
  3. type of curves
  4. all of the above
Answer
Answer. d

Overturning of vehicles on a curve can be avoided by using a

  1. Vertical curve
  2. Transition curve
  3. Reverse curve
  4. Compound curve
Answer
Answer. b

The length of Summit Curve on a two lane two way highway depends upon

  1. allowable rate of change of centrifugal acceleration
  2. coefficient of lateral friction
  3. required stopping sight distance
  4. required overtaking sight distance
Answer
Answer. c

If L is the length of transition curve and R is the radius of circular curve, then the shift of the curve is directly proportional to

  1. R and 1/L2
  2. 1/R and L2
  3. 1/R2 and L
  4. R2 and 1/L
Answer
Answer. b

A transition curve is introduced to gradually change the

  1. Super elevation
  2. Direction
  3. Camber
  4. Gradient
Answer
Answer. a

For the designing of valley curves, the height of headlight above the road surface is assumed at

  1. 0.15 m above the road surface
  2. 1.2 m above the road surface
  3. 0.75 m above the road surface
  4. 1.5 m above the road surface
Answer
Answer. c

On a horizontal curve, pavement is kept horizontal across the alignment, then pressure on the outer wheel will be

  1. more than the pressure on the inner wheels
  2. less than the pressure on the inner wheels
  3. equal to the pressure on the inner wheels
  4. zero
Answer
Answer. a

The super elevation (in meters) for mixed traffic conditions with a design speed of 75 kmph for a horizontal curve of 738 m, is

  1. 0.23
  2. 0.06
  3. 0.10
  4. 0.45
Answer
Answer. b

Find out the rate of change of centrifugal acceleration for a design speed of 75 kmph, using IRC recommended formula.

  1. 0.53 m/sec3
  2. 0.63 m/sec3
  3. 0.48 m/sec3
  4. 0.73 m/sec3
Answer
Answer. a

The absolute minimum radius of horizontal curve is

  1. V2/27.3
  2. V2/8.44
  3. V2/18.9
  4. V2/17
Answer
Answer. a

Which of the following curves can be used to avoid overturning or vehicles on a curve?

  1. Compound
  2. Vertical
  3. Transition
  4. Reverse
Answer
Answer. c

The minimum radius of curvature allowable for a roadway with a 100 km/hr design speed, when the maximum allowable superelevation rate is 0.12 and coefficient of lateral friction is 0.12 is

  1. 258 m
  2. 328 m
  3. 250 m
  4. 300 m
Answer
Answer. b

When down gradient is followed by up gradient it is a

  1. Simple curve
  2. Valley curve
  3. Summit curve
  4. Reverse curve
Answer
Answer. b

The length of a transition curve is proportional to

  1. V/R
  2. V2/R
  3. V3/R
  4. V4/R

( V = velocity and R = radius of curvature)

Answer
Answer. c

If a transition curve is introduced between a straight and a curve such that a super elevation of 15 cm is introduced over a curve and if the rate of super elevation is 1 in 500, then the length (m) of the transition curve will be

  1. 50
  2. 75
  3. 100
  4. 150
Answer
Answer. b

Which of the following is not a commonly adopted transition horizontal curve in alignment?

  1. Spiral
  2. Cubic parabola
  3. Lemniscate
  4. Sag
Answer
Answer. d

Different grades are joined together by a

  1. reverse curve
  2. transition curve
  3. vertical curve
  4. compound curve
Answer
Answer. c

A curve that changes the alignment of road from downhill to uphill is called

  1. Transition curve
  2. Sag curve
  3. Reverse curve
  4. Summit curve
Answer
Answer. b

Which one of following statement is correct?

  1. The radius of transition raises from infinity to a selected minimum in order to attain full super-elevation and curvature gradually
  2. The compound curve is an arc of circle
  3. The radius of transition curve is constant for entire length
  4. The horizontal curves are provided whenever there is a change in gradient
Answer
Answer. a

What is the radius of the curve at 80 KMPH beyond which no super-elevation is needed for the value of 2.5% camber?

  1. 950 m
  2. 1100 m
  3. 1400 m
  4. 1800 m
Answer
Answer. b

If the radii of a compound curve and a reverse curve are respectively the same, the length of common tangent

  1. of compound curve will be more
  2. of reverse curve will be more
  3. of both curves will be equal
  4. none of these
Answer
Answer. c

Overturning of vehicles on a curve can be avoided by using

  1. Compound curve
  2. Vertical curve
  3. Transition curve
  4. Reverse curve
Answer
Answer. c

The absolute minimum radius of horizontal curve for a design speed of 60 Kmph is nearly

  1. 151 m
  2. 210 m
  3. 360 m
  4. 129 m
Answer
Answer. d

The important factor considered in the design of summit curve on highways is

  1. comfort to passengers
  2. sight distance
  3. super elevation
  4. impact factor
Answer
Answer. b

The radius of curvature provided along a transition curve is

  1. minimum at the beginning and maximum at the end
  2. same throughout its length
  3. equal to the radius of circular curve
  4. varying from infinity at the beginning to the radius of circular curve at the end
Answer
Answer. d

The minimum length of a valley curve should be such that the head light beam sight distance is equal to

  1. stopping sight distance
  2. passing sight distance
  3. braking distance
  4. chord distance
Answer
Answer. a

The rate of equilibrium super elevation on road is

  1. Directly proportional to the square of vehicle velocity
  2. Inversely proportional to the radius of the horizontal curve
  3. Directly proportional to the square of the radius of the horizontal curve

Which of the above statements are correct?

  1. i and iii only
  2. i and ii only
  3. i, ii and iii
  4. ii and iii only
Answer
Answer. b

On the basis of radial acceleration, the length of the transition curve required for connecting the circular curve of radius 200m with radial acceleration of 0.25m/sec3, the designed speed being 90 km/h

  1. 231.5 m
  2. 321.5 m
  3. 312.5 m
  4. 123.5 m
Answer
Answer. c

What is the type of curve adopted for the transition curve in India?

  1. Clothoid
  2. Cubic parabola
  3. Cubic spiral
  4. Lemniscates
Answer
Answer. a

If R is the radius of the circular curve (in m), then the maximum grade compensation recommended is

  1. 50/R
  2. 75/R
  3. 100/R
  4. 125/R
Answer
Answer. b

An automotive company designs a truck with a wheelbase of 8m. What is the off tracking (m) while negotiating a curved path with a mean radius of 32 m?

  1. 0.25
  2. 0.125
  3. 0.625
  4. 1
Answer
Answer. d

If a vertical summit curve is formed at the intersection of two gradients +2.5% and -3%. What is the deviation angle (N)?

  1. 1.5
  2. 0.5
  3. 5.5
  4. 4.5
Answer
Answer. c

Which of the following curves is usually NOT adopted for transitioning in horizontal alignment?

  1. Reverse
  2. Spiral
  3. Cubic parabola
  4. Lemniscates
Answer
Answer. a

If the radius of curvature on a road is 600 m and the allowable speed is 75 kmph, then what will be the required elevation?

  1. 0.02
  2. 0.06
  3. 0.03
  4. 0.04
Answer
Answer. d

Total angle of deflection of a transition curve is

  1. Spiral angle
  2. Spiral angle/2
  3. Spiral angle/3
  4. Spiral angle/4
Answer
Answer. c
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