Deck 3: Irrigation and Water Management: Part C

Question 1

Lacey assumed a trapezoidal cross-section of a regime channel

Answer 1

False

Question 2

Lining of a canal

A)increases
B)decreases
C)does not effect

Answer 2

decreases

Question 3

The berms when fully formed

A)reduce the absorption losses and prevents leaks
B)protect the bank from erosion because of wave action
C)provide a scope for future widening the channel
D)all of the above

Answer 3

all of the above

Question 4

Irrigation is supplementary to rainfall.

Question 5

Trough stage of river is most suitable location for diversion head works.

Question 6

A useful soil moisture for plant growth is

A)capillary water
B)gravitational water
C)hygroscopic water
D)all of these

Question 7

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

Question 8

The river training works are adopted on a river

A)to pass high flood discharge safely and quickly through the breach
B)to direct and guide the river flow
C)to reduce bank erosion to a minimum
D)all of the above

Question 9

The science which deals with the measurement of water is called hydrometry.

Question 10

The gap or margin of height, between full supply level (F.S.L.) and top of the bank is called

A)free board
B)dowel
C)inspection roadway
D)berm

Question 11

The optimum depth of kot watering is 19 cm for

A)wheat
B)sugar-cane
C)rice
D)cotton

Question 12

The width of meandering belt is the

A)transverse distance between the apex point of one curve and apex point on reverse curve
B)axial distance along the river between tangent point of one curve and tangent point of other curve of same order
C)axial distance along the river between the apex point of one curve and apex point on reverse curve
D)transverse distance along the river between tangent point of one curve and tangent point of other curve of same order

Question 13

The function of a scouring sluice is

A)to control the silt entry into the canal
B)to scour the silt deposited in the river bed above the approach channel
C)to pass the low floods without dropping the shutters of the main weir
D)all of the above

Question 14

In case of syphon aqueduct, the H.F.L. of the drain is

A)much below the bottom of the canal trough
B)much higher above the canal bed
C)in level with the canal bed
D)none of the above

Question 15

A canal head work in rocky stage of a river is not suitable because

A)more cross drainage works are required
B)a costly head regulator is required
C)more falls are necessary to dissipate the energy
D)all of the above

Question 16

Non-silting, non-scouring velocity is called

A)mean
B)critical

Question 17

Sprinklar irrigation is adopted for

A)level
B)uneven
C)hilly

Question 18

In a Sarda type fall, the trapezoidal crest is used for discharges over 14 m³/s.

Question 19

The flexibility of a sub-proportional outlet is less than one

Question 20

A part of water which will move out of the soil, if proper drainage is provided, is known as gravitational water.

Question 21

In level crossing, the water level of canal is much higher than that of the drainage.

Question 22

The length of groyne depends upon the magnitude of river training required.

Question 23

When the quantity of the earth is much in excess of the quantity required for filling, it has to be deposited in the form of spoil banks. The spoil banks are made on

A)the right side
B)the left side
C)both the sides
D)all of these

Question 24

Irrigation

A)increases
B)decreases