Highway Engineering

1

For calculating the tractive force along an upgrade of an asphalt road, the most probable value of the co-efficient of traction resistance mu is assumed

A. 1/10
B. 1/20
C. 1/30
D. 1/100
E. 1/50

2

.

If V is speed of a moving vehicle, r is radius of the curve, g is the acceleration due to gravity, W is the width of the carriageway, the super elevation is

A. (WV)/(gr)
B. (W^2V)/(gr)
C. (WV^2)/(gr)
D. (WV)/(gr^2)
E. (WV^2)/(gr^2)

3

If E is the modulus of elasticity of the concrete in kg/cm2, d is the slab thickness in cm, is the Poisson's ratio for the concrete, k is the sub-grade modulus kg/cm3, the radius r of relative stiffness in cm,

A. root [4]((Ed^3)/(12(1 - mu^2)K)
B. root [4]((Ed^3)/(12(1 + mu^2)K)
C. root [4]((Ed^2)/(12(1+mu^2)K)
D. root [4]((Ed^2)/(12(1 - mu^2)K)

4

The standard equation of a cubic parabolic transition curve provided on roads, is

A. Y = (x^3)/(6RL)
B. Y = (x)/(6RL)
C. Y = (l^2)/(6RL)
D. Y = (l^3)/(6RL)
E. none of these.

5

The safe stopping sight distance D, may be computed from the equation

A. D = 0.278 Vt + (V^2)/(254f)
B. D = 0.254 Vt + (V^2)/(278f)
C. D = 0.254 Vt + (V^2)/(225f)
D. D = 0.225 Vt + (V^2)/(254f)