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

- 0.81
- 0.55
- 0.67
- 0.50

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?

- 78.1 m
- 72.3 m
- 84.2 m
- 88.3 m

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

- sides towards the centre
- centre towards the sides
- lower edge towards the upper edge
- upper edge towards the lower edge

The maximum safe speed on roads depends on the

- type of the highway
- type of the road surface
- type of curves
- all of the above

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

- Vertical curve
- Transition curve
- Reverse curve
- Compound curve

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

- allowable rate of change of centrifugal acceleration
- coefficient of lateral friction
- required stopping sight distance
- required overtaking sight distance

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

- R and 1/L
^{2} - 1/R and L
^{2} - 1/R
^{2}and L - R
^{2}and 1/L

A transition curve is introduced to gradually change the

- Super elevation
- Direction
- Camber
- Gradient

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

- 0.15 m above the road surface
- 1.2 m above the road surface
- 0.75 m above the road surface
- 1.5 m above the road surface

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

- more than the pressure on the inner wheels
- less than the pressure on the inner wheels
- equal to the pressure on the inner wheels
- zero

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

- 0.23
- 0.06
- 0.10
- 0.45

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

- 0.53 m/sec
^{3} - 0.63 m/sec
^{3} - 0.48 m/sec
^{3} - 0.73 m/sec
^{3}

The absolute minimum radius of horizontal curve is

- V
^{2}/27.3 - V
^{2}/8.44 - V
^{2}/18.9 - V
^{2}/17

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

- Compound
- Vertical
- Transition
- Reverse

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

- 258 m
- 328 m
- 250 m
- 300 m

When down gradient is followed by up gradient it is a

- Simple curve
- Valley curve
- Summit curve
- Reverse curve

The length of a transition curve is proportional to

- V/R
- V
^{2}/R - V
^{3}/R - V
^{4}/R

( V = velocity and R = radius of curvature)

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

- 50
- 75
- 100
- 150

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

- Spiral
- Cubic parabola
- Lemniscate
- Sag

Different grades are joined together by a

- reverse curve
- transition curve
- vertical curve
- compound curve

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

- Transition curve
- Sag curve
- Reverse curve
- Summit curve

Which one of following statement is correct?

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

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

- 950 m
- 1100 m
- 1400 m
- 1800 m

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

- of compound curve will be more
- of reverse curve will be more
- of both curves will be equal
- none of these

Overturning of vehicles on a curve can be avoided by using

- Compound curve
- Vertical curve
- Transition curve
- Reverse curve

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

- 151 m
- 210 m
- 360 m
- 129 m

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

- comfort to passengers
- sight distance
- super elevation
- impact factor

The radius of curvature provided along a transition curve is

- minimum at the beginning and maximum at the end
- same throughout its length
- equal to the radius of circular curve
- varying from infinity at the beginning to the radius of circular curve at the end

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

- stopping sight distance
- passing sight distance
- braking distance
- chord distance

The rate of equilibrium super elevation on road is

- Directly proportional to the square of vehicle velocity
- Inversely proportional to the radius of the horizontal curve
- Directly proportional to the square of the radius of the horizontal curve

Which of the above statements are correct?

- i and iii only
- i and ii only
- i, ii and iii
- ii and iii only

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/sec^{3}, the designed speed being 90 km/h

- 231.5 m
- 321.5 m
- 312.5 m
- 123.5 m

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

- Clothoid
- Cubic parabola
- Cubic spiral
- Lemniscates

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

- 50/R
- 75/R
- 100/R
- 125/R

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?

- 0.25
- 0.125
- 0.625
- 1

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

- 1.5
- 0.5
- 5.5
- 4.5

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

- Reverse
- Spiral
- Cubic parabola
- Lemniscates

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?

- 0.02
- 0.06
- 0.03
- 0.04

Total angle of deflection of a transition curve is

- Spiral angle
- Spiral angle/2
- Spiral angle/3
- Spiral angle/4