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41.

When the bearing capacity of soil is poor and the intensity of traffic is high, an additional layer is provided between the soling and sub-grade. This additional layer is called

A.	wearing layer	B.	sub-base
C.	road surfacing	D.	all of these

42.

The strength and durability of a road depends upon its sub-grade.

True

False

43.

The thickness of base, in no case, whould be more than

A.	10 cm	B.	15 cm
C.	20 cm	D.	30 cm

44.

The highest point on road surface is called

A.	crown	B.	camber
C.	gradient	D.	berm

45.

The function of a road base is to transmit load of the traffic from the

soling

surfacing

46.

The road surfacing should be

A.	impervious	B.	durable
C.	stable	D.	all of these

47.

The slope of the line joining the crown and edge of the road surface is known as

A.	cross-fall	B.	corss-slope
C.	camber	D.	any one of these

48.

A camber of 1 in 30 means that for a 30 m wide road, the crown of the road will be

0.5 m

1 m

49.

The thickness of road surfacing depends upon the

A.	type of traffic	B.	intensity of traffic
C.	type of material	D.	all of these

50.

The main object of providing a camber is

A.	to make the road surface impervious	B.	to make the road surface durable
C.	to drain off rain water from road surface, as quickly as possible	D.	all of the above