Question 1

The flexible pavements have self-healing properties.

Accepted Answer

A)  Right
B)  Wrong A

Question 2

The value of group index of a soil varies from

Accepted Answer

A)  0 to 10
B)  0 to 20
C)  20 to 30
D)  30 to 40 B

Question 3

According to IRC, the minimum length of the summit or valley curve should not be less than

Accepted Answer

A)  one-half
B)  one-fourth
C)  two-third A

Question 4

Carriage-way is protected by

Accepted Answer

A)  0.5 to 1.25 m
B)  1.25 to 2 m
C)  2 to 4 m
D)  4 to 6 m

Question 5

Roads only meant for slow moving traffic

Accepted Answer

A)  must
B)  must not

Question 6

Traffic-actuated signals may be

Accepted Answer

A)  full traffic-actuated signals
B)  semi-traffic actuated signals
C)  speed control signals
D)  all of these

Question 7

On cement concrete roads, the comber generally provided is 1 in 70 to 1 in 80.

Accepted Answer

A)  Agree
B)  Disagree

Question 8

The rate of change of radial acceleration governs the

Accepted Answer

A)  length of a transition curve
B)  extra width of pavement on the curve
C)  length of the tangent of a simple circular curve
D)  all of the above

Question 9

A camber consisting of two straight slopes joining at the centre is called

Accepted Answer

A)  barrel camber
B)  sloped camber
C)  composite camber
D)  none of these

Question 10

In India, a curve is expressed in terms of angle in degrees subtended to the centre by an arc of

Accepted Answer

A)  25 m
B)  30 m
C)  45 m
D)  60 m

Question 11

The Border Roads Development Board was established in

Accepted Answer

A)  1934
B)  1948
C)  1951
D)  1960

Question 12

If R is the radius of curvature of a hill road, the maximum grade compensation (in percentage) is equal to

Accepted Answer

A)  65/R
B)  75/R
C)  85/R
D)  95/R

Question 13

At a road junction,

Accepted Answer

A)  5
B)  7
C)  9
D)  16

Question 14

The reason for providing curves on a highway is

Accepted Answer

A)  to provide access to a particular locality
B)  restriction imposed by some unavoidable reasons of land
C)  preservation of existing amenities
D)  all of the above

Question 15

The type of transition curve recommended by the IRC is

Accepted Answer

A)  cubic parabola
B)  cubic spiral
C)  lamniscate
D)  none of these

Question 16

For walls less than 6 m in height, the thickness of the retaining wall at the bottom is equal to

Accepted Answer

A)  0.2 times the height
B)  0.3 times the height
C)  0.4 times the height
D)  0.5 times the height

Question 17

When the bearing capacity of soil is poor and the intensity of traffic is high, an additional layer is provided between the soling and sub-grade. This additional layer is called

Accepted Answer

A)  wearing layer
B)  sub-base
C)  road surfacing
D)  all of these

Question 18

The maximum spacing of contraction joints in unreinforced concrete slabs for a slab thickness of 20 cm is

Accepted Answer

A)  4.5 m
B)  10 m
C)  15 m
D)  20 m

Question 19

The value of ruling gradient in plain, as recommended by Indian Roads Congress, is

Accepted Answer

A)  1 in 10
B)  1 in 20
C)  1 in 30
D)  1 in 40

Question 20

The longest distance at which a driver, whose line of sight is 1.2 m above the road surface, can see the top of an object 10 cm high on the surface of road, is called

Accepted Answer

A)  crossing sight distance
B)  stopping or non-passing sight distance
C)  over taking or passing sight distance
D)  lateral sight distance

Exam 5: Road Design and Construction