Select the correct option with regard to the following statements (S1, S2) pertaining to pavements.

S1: Present serviceability index is used for the functional evaluation of pavement surface condition.

S2: Rigid pavements are less affected by temperature variations than flexible pavements.

Question

Select the correct option with regard to the following statements (S1, S2) pertaining to pavements.

S1: Present serviceability index is used for the functional evaluation of pavement surface condition.

S2: Rigid pavements are less affected by temperature variations than flexible pavements.

RRB Paper · Accepted Answer

Present serviceability index defines pavement performance in terms of the present serviceability index (PSI), which varies from 0 to 5 Where 5 represent excellent.

Rigid pavements are made up of Portland cement concrete, and may or may not have a base course between the pavement and the subgrade.

The difference between rigid and flexible pavement is given by:

Flexible pavement	Rigid Pavement
The load is transferred from top to bottom by grain to grain contact.	The load is transferred through slab action
Low or negligible flexural strength.	High flexural strength.
Joints are absent.	Expansion and contraction joints are provided
Low initial cost but high maintenance cost.	High Initial cost but low maintenance cost.
It includes- Surface, base, sub-base, and subgrade layers.	It includes – Concrete slab, base course, and subgrade layers.
Deformation in the top layers is transferred to under- laid layers	Deformation is only in the top layer of the concrete slab.
Less suitable for stage construction	More Suitable for stage construction.
Very less effect of temperature stress.	Effected by temperature and frictional stresses.

Select the correct option with regard to the following statements (S1, S2) pertaining to pavements.

S1: Present serviceability index is used for the functional evaluation of pavement surface condition.

S2: Rigid pavements are less affected by temperature variations than flexible pavements.

Both statements S1 and S2 are true

Statement S1 is true and Statement S2 is false

Statement S1 is false and Statement S2 is true

Both statements S1 and S2 are false

The correct answer is `No. 2: Statement S1 is true and Statement S2 is false`

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Select the correct option with regard to the following statements (S1, S2) pertaining to pavements. S1: Present serviceability index is used for the functional evaluation of pavement surface condition. S2: Rigid pavements are less affected by temperature variations than flexible pavements.

Both statements S1 and S2 are true

Statement S1 is true and Statement S2 is false

Statement S1 is false and Statement S2 is true

Both statements S1 and S2 are false

The correct answer is No. 2: Statement S1 is true and Statement S2 is false

Select the correct option with regard to the following statements (S1, S2) pertaining to pavements.

S1: Present serviceability index is used for the functional evaluation of pavement surface condition.

S2: Rigid pavements are less affected by temperature variations than flexible pavements.

The correct answer is `No. 2: Statement S1 is true and Statement S2 is false`