TRANSPORTATION ENGINEERING MCQs - 9 | GATE EXAM | CIVIL ENGINEERING

 

41. The unit for coefficient of subgrade modulus is ____.

A.  kN/m²

B.  kNm

C.  kN/m³

D.  kN/m

 

 

Answer: A        kN/m³

 

 

42. California Bearing Ratio (CBR) ____.

A.  is a method of soil identification

B.  is a measure to indicate the relative strengths of paving materials

C.  is a measure of soil strength

D.  is a procedure for designing flexible pavements

 

 

Answer: B      is a measure to indicate the relative strengths of paving materials

 

 

43. The position of base course in a flexible pavement is ____.

A.  below the sub-base

B.  over the sub-grade but below the sub-base

C.  over the wearing course when renewal of surface is needed

D.  over the sub-base

 

 

Answer: D     over the sub-base

Explanation:

The pavements which have low or negligible flexural strength and are rather flexible in their structural action under the loads are Flexible Pavements. A typical flexible pavement consists of four components:

·       Soil subgrade

·       Sub-Base course

·       Base course

·       Surface course

 

 

44. The Modulus of Subgrade Reaction is evaluated from ____.

A.  CBR test

B.  direct shear test

C.  triaxial test

D.  plate bearing test

 

 

Answer: D     plate bearing test

 

 

45. The load transfer to lower layers in flexible pavements is by ____.

A.  grain to grain contact

B.  consolidation of subgrade

C.  shear deformation

D.  bending action of layers

 

 

Answer: A       grain to grain contact

Explanation:

The flexible pavement layers transmit the vertical or compressive stress to the lower layers by grain to grain transfer through the points of contact in the granular structure.

 

 

 

 

 

 

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