Deck 5: Road Design and Construction

Question 1

A barrel camber consists of

A)two straight slopes joining at the centre
B)two straight slopes with a parabolic crown in the centre
C)a continuous curve either parabolic or ellptical
D)none of the above

Answer 1

a continuous curve either parabolic or ellptical

Question 2

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

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

Answer 2

sloped camber

Question 3

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

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

Answer 3

30 m

Question 4

The rate of change of radial acceleration governs the

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 5

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

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

Question 6

The Border Roads Development Board was established in

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

Question 7

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

A)Agree
B)Disagree

Question 8

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

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

Question 9

Roads only meant for slow moving traffic

A)must
B)must not

Question 10

The flexible pavements have self-healing properties.

A)Right
B)Wrong

Question 11

At a road junction,

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

Question 12

On kankar road, the camber generally provided is

A)1 in 24 to 1 in 30
B)1 in 30 to 1 in 48
C)1 in 48 to 1 in 60
D)1 in 60 to 1 in 80

Question 13

Carriage-way is protected by

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

Question 14

The overall length of the vehicle effects the

A)turning radii of the curve
B)time needed to overtake
C)off-tracking of vehicle
D)all of these

Question 15

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

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

Question 16

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

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

Question 17

The type of transition curve recommended by the IRC is

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

Question 18

The reason for providing curves on a highway is

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 19

Traffic-actuated signals may be

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

Question 20

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

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

Question 21

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

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

Question 22

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

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 23

The value of group index of a soil varies from

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

Question 24

The strength and durability of a road depends upon its sub-grade.