Deck 1: Road Construction and Design: Part A

Question 1

In CBR test, the value of CBR is calculated at

A)2.5 mm penetration only
B)5 mm penetration only
C)both 2.5 and 5 mm penetration
D)none of these

Answer 1

both 2.5 and 5 mm penetration

Question 2

The steepest gradient which is to be permitted on the road is called

A)maximum gradient
B)limiting gradient
C)both (a) and (b)
D)none of these

Answer 2

both (a) and (b)

Question 3

The stopping sight distance is the

A)summit
B)difference
C)product

Answer 3

summit

Question 4

Floating gradients are provided at

A)summit
B)valley

Question 5

The raising of outer edge of the road above the inner edge is known as

A)super-elevation
B)cant
C)banking
D)all of these

Question 6

The converence of chief engineers of all provinces was held at Nagpur in

A)1943
B)1947
C)1958
D)1960

Question 7

A wall constructed to retain the earth from slippage on the hill side of the roadway is called

A)breast wall
B)retaining wall
C)parapet wall
D)none of these

Question 8

Coment concrete pavements are classified as flexible pavements.

A)Agree
B)Disagree

Question 9

The gradients of trace cuts for hill roads are kept

A)10 to 20% easier than the ruling gradient
B)20 to 25% easier than the ruling gradient
C)10 to 20% steeper than the ruling gradient
D)20 to 25% steeper than the ruling gradient

Question 10

The size of a stone used on a road must be in due proportion to the space occupied by a wheel of ordinary dimensions on a smooth level surface. This point of contact will be found to be longitudinally about 25 mm and every piece of stone put into a road which exceeds 25 mm in any of its dimensions is mischievous. This statement is according to Macadam.

A)Correct
B)Incorrect

Question 11

A transition curve can not be a

A)true spiral
B)cubic spiral
C)compound curve
D)cubic parabola

Question 12

Which of the following statement is correct?

A)The sub-base course is composed of hard well burnt clinker natural gravel or any other suitable material excavated at or near the site.
B)The base is composed of broken stone and granular material with tar.
C)The wearing surface in the case of flexible pavement consists of a mixture of bituminous material and aggregate.
D)all of the above

Question 13

As per IRC recommendations, traffic volume study is carried out for rural roads for

A)7
B)14
C)21
D)28

Question 14

In Nagpur conference, the minimum width of village roads was recommended as

A)2 m
B)2.25 m
C)2.45 m
D)3.2 m

Question 15

Which of the following statement is correct?

A)In rocky areas and dense jungles, the trace cut may be avoided and some suitable arrangement may be made so as to gain access for ascertaining details.
B)Reconnaissance is best done by topographical surveys.
C)The detailed survey should be conducted for a strip covering on either side of the chosen centre line a width of about 15 m in case of straight stretches and 30 m in case of sharp curves.
D)all of the above

Question 16

The traffic manoeuvre means

A)diverging
B)merging
C)crossing
D)all of these

Question 17

Which of the following is not a transition curve?

A)Compound curve
B)cubic spiral
C)Cubic parabola
D)True spiral

Question 18

According to IRC specifications, the length of any tie bar in concrete pavements should atleast be equal to

A)one-half
B)twice
C)thrice

Question 19

The prevailing conditions referred to under the possible capacity of a traffic lane are ideal if

A)there are at least two lanes for the exclusive use to traffic moving in one direction
B)all the vehicles move at the same uniform speed
C)the widths of lanes, shoulders and clearances to vertical obstructions beyond the edge of the traffic lane are adequate
D)all of the above

Question 20

Which of the following method is recommended by I.R.C. for design of flexible pavement?

A)Group index method
B)CBR method
C)Westergaard method
D)none of these

Question 21

Valley curves are required to be introduced at the situations where

A)a negative grade meets a positive grade
B)a negative grade meets another milder negative grade
C)a negative grade meets a steeper positive grade
D)all of the above

Question 22

End of speed limit' is a

A)regulatory sign
B)warning sign
C)informatory sign
D)none of these

Question 23

The function of a road base is to transmit load of the traffic from the

A)soling
B)surfacing

Question 24

The difference of levels between two points A and B is 1 metre and their distance apart is 50 metres, the gradient is said to be

A)1 in 50 or 2%
B)1 in 5 or 20%
C)1 in 20 or 5%
D)none of these

Question 25

In the initial stage of construction of hill roads, no curve should have a radius less than

A)20 m
B)30 m
C)40 m
D)50 m