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)`