Deck 10: Water Engineering and Irrigation Systems

Question 1

Distributary head regulators are provided

A)to control the supplies to the off-taking channel
B)to control the silt entry in the off-taking canal
C)to stop the supply, when not needed, in the off-taking canal
D)all of the above

Answer 1

all of the above

Question 2

Which of the following is a type of semi-module outlet?

A)Submerged pipe outlet
B)Open flume outlet
C)Kennedy's gauge outlet
D)all of these

Answer 2

Kennedy's gauge outlet

Question 3

The opening in the weir wall with a crest at low level on the canal side is known as under sluice or scouring sluice.

Answer 3

True

Question 4

The optimum depth of kor watering for wheat in the plains of north India is

A)13.5 cm
B)16.5 cm
C)19 cm
D)21 cm

Question 5

The flexibility of a hyper-proportional outlet is

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

Question 6

In a proportional outlet, the rate of change of its discharge is

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

Question 7

A weir fails due to

A)rupture of floor due to uplift
B)rupture of floor due to suction caused by standing wave
C)scour on the upstream and downstream of the weir
D)all of the above

Question 8

The average delta of rice crop is nearly

A)30 cm
B)60 cm
C)120 cm
D)150 cm

Question 9

The science which deals with the physical features and conditions of water on the earth surface is called

A)hydrometry
B)hydrography
C)hydrosphere
D)hydraulics

Question 10

A groyne with a curved head is known as

A)hockey groyne
B)burma groyne
C)denehy groyne
D)none of these

Question 11

The slope of a canal, for a discharge of 300 cumecs, should be

A)1 in 4000
B)1 in 6000
C)1 in 8000
D)1 in 10000

Question 12

The precipitation caused by natural rising of warmer lighter air in colder and denser surroundings, is called

A)convective precipitation
B)orographic precipitation
C)cyclonic precipitation
D)none of these

Question 13

The sensitivity of a rigid module is

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

Question 14

The Sarda canal has a

A)glacis type fall
B)vertical drop fall
C)Ogee fall
D)rapid fall

Question 15

When discharge of an outlet is independent of the water levels in the water course and the distributary, the outlet is termed as a

A)flexible outlet
B)non-modular outlet
C)semi-module outlet
D)rigid module

Question 16

For low navigation dams, the type of gate used is

A)rolling gate
B)bear trap gate
C)vertical lift gate
D)drum gate

Question 17

The coefficient of creep is the reciprocal of percolation coefficient.

Question 18

Cross regulators are provided

A)to raise the water level to its upstream during the periods of low discharges in the parent channel
B)to help in closing the supply to down stream of the parent channel
C)to absorb fluctuation in various sections of the canal system
D)all of the above

Question 19

The commonly used rain gauge is

A)weighing bucket type
B)tipping bucket type
C)float type
D)none of these

Question 20

Which of the following statement is wrong?

A)In Kennedy's wilt theory, no account was taken of silt concentration and bed load.
B)Kennedy did not gave any slope equation.
C)In Kennedy's theory, silt grade and silt charge were not defined.
D)none of the above

Question 21

The sensitivity of an outlet is defined as the ratio of the

A)rate of change of discharge of an outlet to the rate of change of discharge of the distributing channel
B)rate of change of discharge of an outlet to the rate of change in level of the distributing surface, referred to normal depth of the channel
C)depth of the sill or the crest level of the module below the full supply of the distributing channel to the full supply depth of the distributing channel
D)head recovered to the head put in an outlet

Question 22

Crop ratio is the ratio of area irrigated

A)in Rabi season to Kharif season
B)in Kharif season to Rabi season
C)under perennial crop to total crop
D)under perennial crop to non-perennial crop

Question 23

The depth of root zone is 90 cm for

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

Question 24

A parabolic glacis type fall is commonly known as

A)Montague fall
B)Inglis fall
C)Sarda fall
D)vertical type fall

Question 25

For Madras catchments, the flood discharge is estimated from Q = CA^2/3. This formula is known as

A)Dicken's formula
B)Ryve's formula
C)Nawab Jang Bahadur formula
D)Inglis formula