Deck 2: Irrigation and Water Management: Part B

Question 1

Gibb's module is a type of

A)non-moduler outlet
B)semi-modular outlet
C)rigid modular outlet
D)upon flume outlet

Answer 1

rigid modular outlet

Question 2

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

Answer 2

unit hydrograph

Question 3

The duty of a crop is 432 hectares per cumec when the base period of the crop is 100 days. The delta for the crop will be

A)100
B)200
C)432
D)864

Answer 3

200

Question 4

The first watering before sowing the crop, is known as

A)kor watering
B)paleo
C)delta
D)none of these

Question 5

The measure adopted to reclaim the water-logged area is

A)installation of lift irrigation schemes
B)lining of canals
C)lowering the full supply level
D)all of these

Question 6

Water logging is caused due to

A)inadequate drainage facilities
B)over irrigation
C)presence of impermeable strata
D)all of these

Question 7

In Sarda type fall, the length of the crest is kept

A)more than
B)equal to
C)less than

Question 8

In a super-passage, the F.S.L. of the canal is

A)lower than the underside of the trough carrying drainage water
B)above the bed level of the drainage trough
C)in level with the drainage trough
D)none of the above

Question 9

Which of the following statement is correct?

A)In free flooding, the field is divided into a number of small sized plots which are pratically level.
B)In border strip method, the strips are separated by low levels.
C)In furrow irrigation, the water is admitted between the rows of plants in the field.
D)all of the above

Question 10

The total depth of water required by a crop during the entire period the crop is in the field, is known as

A)delta
B)duty
C)base period
D)crop period

Question 11

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

Question 12

A hydraulic jump is formed when

A)a sub-critical flow strikes against a super-critical flow
B)a super-critical flow strikes against a sub-critical flow
C)the two flows of super-critical velocity meet each other
D)the two flows of sub-critical velocity meet each other

Question 13

When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the under side of the supporting structure, the structure provided is super-passage.

Question 14

According to Kennedy, the silt supporting power is

A)directly proportional to
B)inversely proportional to

Question 15

Which of the following statements is correct?

A)The aggrading type of river builds up its bed to a certain slope.
B)The degrading type of river looses its bed gradually in the form of sediment load of the stream.
C)The pattern of meander is altered by variation in discharge slope and bed forming material
D)all of the above

Question 16

A part of water which exists in the porous space of the soil by molecular attraction, is known as

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

Question 17

For a discharge of 4m³/s in Sarda type fall,

A)rectangular
B)trapezoidal

Question 18

A contour canal

A)is most suitable in hilly areas
B)irrigates only on one side
C)is aligned parallel to the contour of the country
D)all of the above

Question 19

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

Question 20

When an oven-dried sample of soil is kept open in the atmosphere, it absorbs some amount of water. This water is known as

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

Question 21

The level of a canal diversion head work depends upon

A)discharge perimeter
B)pond level
C)full supply level of canal
D)all of these

Question 22

An outlet is said to be proportional, if its flexibility is

A)equal to zero
B)less than unity
C)equal to unity
D)more than unity

Question 23

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

Question 24

Sandy soils with good drainage become impermeable after prolonged use, if it is irrigated with a water containing

A)25%
B)50%
C)75%
D)85%

Question 25

The ratio of the rate of change of discharge of an outlet to the rate of change of the discharge of the distributing channel, is termed as

A)proportionality
B)flexibility
C)sensitivity
D)efficiency