Question 1

The braking efficiency for a vehicle moving with a speed of 18kmph, having a lag distance of 14m and coefficient of longitudinal friction is 0.36.

Accepted Answer

braking efficiency=100*f'/f

Question 2

If the longitude coefficient of friction is 0.4, then the resultant retardation in m/sec² as per IRC will be ___________

Accepted Answer

the deceleration of the vehicle mainly depends on the speed of the vehicle and coefficient of friction; however irc has calculated the average value is 3.93 m/sec² from equations of motion.

Question 3

The unevenness index for a good pavement surface of high speed should be ___________

Accepted Answer

the unevenness index for a good pavement surface should be kept as low as possible, because they may cause discomfort to passengers and increase the rate of accidents.

Question 4

If the camber is x%, then cross slope is ___________

Accepted Answer

the cross slope is generally expressed in n in 100 terms, so the cross slope is x/100.

Question 5

The camber required depends on ___________

Accepted Answer

the camber to be provided changes depending on the type of rainfall and the type of pavement surface.

Question 6

The minimum camber required in heavy rainfall area for bituminous roads as per IRC is ___________

Accepted Answer

the minimum camber to be provided in heavy rainfall areas is 2.5%. if there is heavy flood then provision of this camber will be sufficient to drain of flood water.

Question 7

The camber is not provided in which of the following shape?

Accepted Answer

the camber is a raised portion, it has to be either straight or parabolic no other shape of camber is possible.

Question 8

The rise of crown for pavement of 7m wide having 1 in 50 slopes with respect to edges is ___________

Accepted Answer

width of pavement=7m

Question 9

The equation of parabolic camber is given by ___________

Accepted Answer

the general equation is expressed as y=x² /a, where a=nw/2 for a pavement width of w and cross slope of 1 in n.

Question 10

The minimum width of carriage way in urban roads is ___________

Accepted Answer

the minimum width of carriage way is 3.75m in urban roads; this value may be less in towns and villages depending on the requirement like 3.5 m.

Question 11

A median is also called as ___________

Accepted Answer

the median may be a physical marking, divided area or protected by physical structure to avoid head on collisions.

Question 12

The desirable width as per IRC for median on rural roads is ___________

Accepted Answer

the desirable width is 5m on rural roads which can be reduced to 3m if there is a restriction of land.

Question 13

The height of low kerb is kept about ___________

Accepted Answer

a kerb is a structure used to separate pavement and median, pavement and shoulder, pavement and footpath. in low kerb height is restricted to 100mm only.

Question 14

The minimum shoulder width recommended by IRC is ___________

Accepted Answer

the minimum shoulder width is 2.5m recommended by irc, the shoulder provides lateral stability and act as emergency lanes for vehicles.

Question 15

The width of drive way should be ___________

Accepted Answer

the width of drive way should be kept as minimum as possible to reduce the crossing distance of pedestrians.

Question 16

A road running parallel to highway for some selected areas with grade separator are called ___________

Accepted Answer

a frontage road is a road that is mainly laid in urban areas to connect some parts of the city without disturbing the highway.

Question 17

The width of formation is calculated by adding?

Accepted Answer

the width of formation or roadway is the sum of pavements, shoulders and separator excluding side drains.

Question 18

The boundary till which building activities are prohibited is called ___________

Accepted Answer

the space left over for future expansion of roads without allowing any building activities is called as building line.

Question 19

The normal width recommended in rural areas by IRC for a national highway is ___________

Accepted Answer

the average width required for a national highway is 45m, it may be between 30m-60m for plain and rolling terrains.

Question 20

The length visible to driver at any instance of time is called ___________

Accepted Answer

the length of the road that is visible to the driver at any time is called sight distance, in night visibility it is headlight sight distance and in zone which it can be overtaken is called overtaking sight distance.

Quiz 1: Road Design and Safety Standards: Camber, Slope, Width, and Distance Requirements