Cross Sectional Elements Questions and Answers

Q: As per IRC52 : 2019, the maximum camber that should be provided on earth road is :-

The maximum camber for an earth road is 1 in 25.Camber depends on the surface and the rainfall: the more pervious and rough the surface, the steeper the camber needed to shed water. IRC recommends 3 to 4 percent for earth roads, the steepest of all surfaces, so the maximum is 4 percent, or 1 in 25.1 in 40 (2.5 percent) suits a paved or gravel surface, and 1 in 20 (5 percent) and 1 in 16.7 (6 percent) are steeper than the recommended range and would cause erosion of the road surface.

Q: The convexity provided to the carriage way between the crown and edge of pavement is known as:-

The convexity is called the Camber.Camber (cross slope) is the slope given to the carriageway from the crown to the edges, so that rainwater drains off the surface quickly. It is usually shaped as two straight slopes or a parabola.Gradient is the longitudinal slope along the road, kerbs are the raised edging along the pavement, and a vertical curve joins two different gradients.

Q: A modern roadway which is made of three layers, its second layer is termed as :

The second layer is the base and sub-base.A modern flexible road pavement is built in three parts. At the top is the wearing surface (surface course) of bituminous or concrete material that carries traffic directly. Beneath it is the base and sub-base of compacted crushed stone or granular material, which spreads the wheel loads and drains water. At the bottom is the subgrade, the prepared natural soil on which the pavement rests.The wearing surface is the first layer and the subgrade the third. Geomembranes are synthetic sheets used as barriers in landfills, canals and some road works, not one of the three standard layers.

What is the recommended range of camber for cement concrete roads in areas with heavy rainfall?

A.1 in 50
B.1 in 40
C.1 in 33
D.1 in 25

Exam Year(s)

DSSSB JE - 2023,

Answer: A

For cement concrete roads in areas with heavy rainfall, the recommended camber is 1 in 50, which is steeper than the 1 in 60 sometimes allowed in light rain. A cross-slope of this order drains the surface quickly, while a flatter one lets water stand. The values of 1 in 40, 1 in 33 and 1 in 25 are the cambers that are used for lower types of surface such as gravel, WBM and earth roads, which need a steeper slope because they are more permeable and rougher.

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As per IRC52 : 2019, the maximum camber that should be provided on earth road is :-

A.1 in 20
B.1 in 25
C.1 in 40
D.1 in 16.7

Exam Year(s)

RSMSSB JE - 2025, RSMSSB JE Agriculture - 2025, RSMSSB - 2025,

Answer: B

The maximum camber for an earth road is 1 in 25.

Camber depends on the surface and the rainfall: the more pervious and rough the surface, the steeper the camber needed to shed water. IRC recommends 3 to 4 percent for earth roads, the steepest of all surfaces, so the maximum is 4 percent, or 1 in 25.

1 in 40 (2.5 percent) suits a paved or gravel surface, and 1 in 20 (5 percent) and 1 in 16.7 (6 percent) are steeper than the recommended range and would cause erosion of the road surface.

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The convexity provided to the carriage way between the crown and edge of pavement is known as:-

A.Gradient
B.Camber
C.Kerbs
D.Vertical curve

Exam Year(s)

RSMSSB JE - 2025, RSMSSB JE Agriculture - 2025, RSMSSB - 2025,

Answer: B

The convexity is called the Camber.

Camber (cross slope) is the slope given to the carriageway from the crown to the edges, so that rainwater drains off the surface quickly. It is usually shaped as two straight slopes or a parabola.

Gradient is the longitudinal slope along the road, kerbs are the raised edging along the pavement, and a vertical curve joins two different gradients.

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A modern roadway which is made of three layers, its second layer is termed as :

A.Base and sub-base
B.Wearing surface
C.Subgrade surface
D.Geomembranes

Exam Year(s)

MH SET - 2025, SET Exam - 2025,

Answer: A

The second layer is the base and sub-base.

A modern flexible road pavement is built in three parts. At the top is the wearing surface (surface course) of bituminous or concrete material that carries traffic directly. Beneath it is the base and sub-base of compacted crushed stone or granular material, which spreads the wheel loads and drains water. At the bottom is the subgrade, the prepared natural soil on which the pavement rests.

The wearing surface is the first layer and the subgrade the third. Geomembranes are synthetic sheets used as barriers in landfills, canals and some road works, not one of the three standard layers.

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