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191.

The value of group index of a soil varies from

A.	0 to 10	B.	0 to 20
C.	20 to 30	D.	30 to 40

192.

Which of the following statement is correct?

A.	The sub-base thickness is directly proportional to the group index of the soil	B.	The higher the group index of the soil, the larger is the thickness of the sub-base.
C.	If the group index value of the sub-base is between 5 and 9, then the sub-base is poor.	D.	all of the above

193.

The minimum thickness of the base of a flexible pavement is kept as

A.	5 cm	B.	10 cm
C.	15 cm	D.	20 cm

194.

As per IRC recommendations, the sub-grade or sub-base layer whatever underlies the concrete wearing slab, in concrete pavements, must confirm to the requirement that

A.	no soft spots are present in the sub-grade or sub-base	B.	the base or sub-base extends to atleast 30 cm wider on either side of the width to be concreted
C.	the sub-grade is properly drained	D.	all of the above

195.

Coment concrete pavements are classified as flexible pavements.

Agree

Disagree

196.

The main advantage of concrete pavements is that

A.	it offers less resistance to traffic	B.	it is not slippery when clean
C.	it has low maintenance cost	D.	all of these

197.

The main advantage of concrete pavements is that

A.	it offers less resistance to traffic	B.	it is not slippery when clean
C.	it has low maintenance cost	D.	all of these

198.

The main disadvantage of concrete roads is that

A.	the initial cost is high	B.	it requires skilled personnel for construction
C.	it requires cautious handling of the material	D.	all of the above

199.

The depth of relinforcement, below the surface of pavement, is kept as

A.	25 mm	B.	50 mm
C.	75 mm

200.

The major function of reinforcement, in concrete pavements, is

A.	to strengthen the slab	B.	to hold together the cracks
C.	to control the development of cracks	D.	all of these