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181.

The sub-base course is placed immediately above the

A.	sub-grade	B.	base
C.	wearing course	D.	none of these

182.

The wearing course in the case of flexible pavements consist of

A.	hard well burnt clinker	B.	broken stone and granular material mixed with tar
C.	a mixture of bituminous material and aggregate	D.	all of the above

183.

The sub-grade is the final load carrying part of the structure.

True

False

184.

The selection of design curve in Wyoming method of flexible pavement design, is based upon

A.	annual precipitation	B.	water-table
C.	frost action	D.	all of these

185.

Which of the following statement is correct?

A.	The sub-base course is composed of hard well burnt clinker natural gravel or any other suitable material excavated at or near the site.	B.	The base is composed of broken stone and granular material with tar.
C.	The wearing surface in the case of flexible pavement consists of a mixture of bituminous material and aggregate.	D.	all of the above

186.

The universally recognized factor which affects the flexible pavement design, is the

A.	characteristics of the natural soil which underlies the pavement	B.	volume and character of traffic that will use the highway
C.	drainage condition of the area	D.	all of the above

187.

The California bearing ratio (CBR) method of flexible pavement design gives an idean about

A.	the quality of road making material	B.	the traffic intensities
C.	the characteristics of soil	D.	all of these

188.

In CBR test, the value of CBR is calculated at

A.	2.5 mm penetration only	B.	5 mm penetration only
C.	both 2.5 and 5 mm penetration	D.	none of these

189.

Which of the following method is recommended by I.R.C. for design of flexible pavement?

A.	Group index method	B.	CBR method
C.	Westergaard method	D.	none of these

190.

The group index method of designing flexible pavement is

A.	an empirical method based on the physical properties of the sub-grade woil	B.	an empirical method based on the strength characteristics of the sub-grade woil
C.	a semi-empirical method	D.	none of these