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81.

A hydrograph representing one cm of run off from a rainfall of some unit duration and specific area distribution is known as

A.	hyetograph	B.	flood hydrograph
C.	unit hydrograph	D.	S-hydrograph

82.

Run-off is measured in

A.	m3/s	B.	m3/min
C.	m3/h	D.	none of these

83.

Flood frequency denotes the likelyhood of flood being equalled or exceeded.

Yes

84.

A canal sligned nearly parallel to the contours of a country, is known as

A.	side slope canal	B.	contour canal
C.	water shed canal	D.	ridge canal

85.

A canal aligned roughly at right angles to the contours of the country is called ridge canal.

True

False

86.

The water shed canal is also called

A.	side slope canal	B.	contour canal
C.	ridge canal	D.	all of these

87.

Irrigation canals are generally aligned along

A.	contour line	B.	water shed
C.	straight line	D.	valley line

88.

A canal aligned at right angles to the contour of a country, is known as

A.	side slope canal	B.	contour canal
C.	water shed canal	D.	branch canal

89.

The alignment of a canal

A.	should be such, so as to ensure minimum number of cross drainage works	B.	on a water shed is the most economical
C.	should avoid valuable properties	D.	all of the above

90.

Inundation canals draw their supplies from rivers whenever there is a

A.	low	B.	high
C.	medium