Deck 10: Road Infrastructure and Design: Understanding Traffic Signals, Pavement

Question 1

The most efficient traffic signal system is

A)simultaneous system
B)alternate system
C)flexible progressive system
D)simple progressive system

Answer 1

flexible progressive system

Question 2

The flexible pavement distribute the wheel load

A)directly to sub-grade
B)through a set of layers to sub-grade
C)through structural action
D)none of these

Answer 2

through a set of layers to sub-grade

Question 3

The shape of the camber provided for cement concrete pavement is

A)straight line
B)parabolic
C)elliptical
D)none of these

Answer 3

straight line

Question 4

The Central Road Research Institute (C.R.R.I.) was started in Delhi, in

A)1951
B)1955
C)1964
D)1965

Question 5

A cement grouted road is an example of

A)semi-rigid
B)rigid
C)flexible

Question 6

Of all the forces stressing a concrete pavement, the most significant are those imposed by the

A)change in temperature
B)change in moisture
C)wheel loads
D)force of friction

Question 7

Super-elevation should not be

A)more
B)less

Question 8

The highest point on road surface is called

A)crown
B)camber
C)gradient
D)berm

Question 9

The foundation of a road is also called

A)soling
B)base
C)either (a) or (b)
D)none of these

Question 10

The average speed maintained by a vehicle over a particular stretch of road, while the vehicle is in motion, is known as

A)design speed
B)running speed
C)spot speed
D)overall speed

Question 11

The group index method of designing flexible pavement is

A)an empirical method based on the physical properties of the sub-grade woil
B)an empirical method based on the strength characteristics of the sub-grade woil
C)a semi-empirical method
D)none of these

Question 12

Steep terrain is a terrain with cross-slope greater than 60 percent.

A)Correct
B)Incorrect

Question 13

Transverse joints are provided at right-angles to the length of road.

Question 14

Gradients more than the floating gradient result in the

A)decrease
B)increase

Question 15

Longitudinal joints in concrete pavements

A)divide the pavement into lanes
B)take care of the unequal settlement of the sub-grade
C)help in laying out concrete in convenient widths
D)all of the above

Question 16

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

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

Question 17

The selection of design curve in Wyoming method of flexible pavement design, is based upon

A)annual precipitation
B)water-table
C)frost action
D)all of these

Question 18

To prevent the overturning of a bullock cart on curves, the maximum value of super-elevation as prescribed by the Indian Roads Congress is

A)1 in 5
B)1 in 10
C)1 in 15
D)1 in 20

Question 19

According to IRC : 52-1973, the first stage for fixing up alignment of a hill road is

A)trace cut
B)detailed survey
C)preliminary survey
D)reconnaissance

Question 20

Class-5 roads have a width of

A)2.45 m
B)3.65 m
C)4.9 m
D)6 m

Question 21

The suitable gradient within which the engineer must endeavour to design the road is called

A)limiting gradient
B)ruling gradient
C)average gradient
D)exceptional gradient

Question 22

The colour of light used for visibility during fog is

A)red
B)yellow
C)green
D)white

Question 23

In hill roads, minimum sight distance required is

A)stopping sight distance
B)passing sight distance
C)braking distance
D)none of these

Question 24

A road sign is generally installed above the ground at a height of

A)2.75 m to 2.80 m
B)2.95 m to 3.00 m
C)3.15 m to 3.5 m
D)more than 3.5 m

Question 25

In order to give satisfactory service throughout the year, the road surface should

A)have a good carriage-way
B)have smooth gradient
C)have a good wearing surface
D)all of these