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161.

When the water is thrown into a well over a crest from where it escapes near its bottom, the type of fall is called

A.	rapid fall	B.	cylinder fall
C.	pipe fall	D.	glacis fall

162.

A sudden fall of level of ground along the alignment of a canal joined by an inclined bed is called a

A.	rapid fall	B.	cylinder fall
C.	sudden fall	D.	hydraulic jump

163.

The cylinder or well fall is quite suitable and economical for

A.	low discharges and low drops	B.	low discharges and high drops
C.	high discharges and low drops	D.	high discharges and high drops

164.

Which of the following statement is wrong?

A.	In a trapezoidal notch fall, the top width of the notch is kept between 3/4th to full water depth above the sill of the notch.	B.	The energy dissipation takes palce by the provision of roughening devices.
C.	The siphon fall is designed to maintain a fixed supply level in the channel.	D.	Energy dissipators are provided for small discharges.

165.

The discharge (Q) over trapezoidal crest of Sarda fall is

A.	same	B.	less
C.	more

166.

The Inglis type fall makes use of

A.	straight	B.	horizontl
C.	vertical

167.

The fall which can be used as a meter fall, is

A.	vertical drop fall	B.	flumed glacis fall
C.	unflumed glacis fall	D.	none of these

168.

A canal outlet should

A.	be so designed that the farmer cannot temper with its functioning	B.	be simple so that it can be constructed or fabricated by local masons
C.	draw its fare share of silt carried by the distributing channel	D.	all of the above

169.

A device which ensures a constant discharge of water passing from one channel to another irrespective of water level in each within certain specified limits, is called

A.	flume	B.	module
C.	meter	D.	none of these

170.

An outlet in which the discharge depends upon the difference in level between the water levels in distributing channel and the water course, is known as

A.	non-modular outlet	B.	semi-module outlet
C.	modular outlet	D.	rigid module