Engineering :: Irrigation Engineering

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121.

Lining of a canal

A.	assures economical water distribution	B.	reduces possibility of breaching
C.	increases available head for power generation	D.	all of the above

122.

In a lined canal, the resistance to flow decreases and velocity of flow increases.

Agree

Disagree

123.

The sodium carbonate lining consists of at lest

A.	6% sodium carbonate and 10% clay	B.	10% sodium carbonate and 6% clay
C.	1% sodium carbonate and 6% clay	D.	1% clay and 6% sodium carbonate

124.

For the repairing of an old but sound concrete lining, the lining preferred is

A.	shotcrete lining	B.	precast concrete lining
C.	soil cement lining	D.	sodium carbonate lining

125.

The weed growth in a canal leads to

A.	decrease in silting	B.	decrease in discharge
C.	increase in discharge	D.	increase in velocity of flow

126.

Garret's diagram gives the graphical method of designing a channel based on

A.	Lacey's theory	B.	Gibb's theory
C.	Kennedy's theory	D.	Khosla's theory

127.

Kennedy, in his silt theory, assumed that the silt is kept in suspension because of eddies generated from the

A.	bed only	B.	sides only
C.	whole perimeter	D.	any one of these

128.

According to Kennedy, the silt supporting power is

directly proportional to

inversely proportional to

129.

Non-silting, non-scouring velocity is called

mean

critical

130.

Kennedy gave a relation between

A.	velocity and hydraulic mean depth	B.	area and velocity
C.	critical velocity and the depth of flowing water	D.	all of the above