Deck 12: Water Circulation and Irrigation

Question 1

The earth's water circulatory system, is known as

A)water cycle
B)hydrologic cycle
C)precipitation cycle
D)all of these

Answer 1

hydrologic cycle

Question 2

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

A)same
B)less
C)more

Answer 2

more

Question 3

The channel after attaining its section and longitudinal slope, will be said to be in

A)initial
B)final
C)permanent

Answer 3

final

Question 4

The ratio of the hed recovered to the head put in an outlet, is called

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

Question 5

A diversion head work is constructed to

A)raise water level at the head of the canal
B)regulate the intake of water into the canal
C)reduce fluctuations in the supply level of the river
D)all of the above

Question 6

Irrigation canals are generally aligned along

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

Question 7

Kennedy gave his own formula for the determination of mean velocity.

Question 8

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

Question 9

Cyclonic precipitation results from

A)lifting of air masses converging into low pressure area
B)natural rising of warmer, lighter air in colder and denser surrondings
C)lifting of warm moisture-laden air masses due to topographic barriers
D)all of the above

Question 10

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.

Question 11

The gaps created in the bank of a canal is called a breach.

Question 12

In Lane's weighted creep theory, he proposed a weight of

A)three for vertical creep and one for horizontal creep
B)three for horizontal creep and one for vertical creep
C)two for vertical and two for horizontal creep
D)any one of the above

Question 13

Escapes are also known as

A)outlet
B)safety valves
C)regulators

Question 14

Inundation canals draw their supplies from rivers whenever there is a

A)low
B)high
C)medium

Question 15

The setting for a hyper-proportional outlet is

A)more
B)same

Question 16

The method of irrigation used for orchards is

A)free flooding
B)border flooding
C)check flooding
D)basin flooding

Question 17

For a canal which irrigate the area directly, the fall should be provided at a location where the F.S.L. outstrips the gound level, but before the bed of the canal comes into filling.

Question 18

The ratio of the head recovered to the head put in an outlet, is called

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

Question 19

Lining of a canal is necessary

A)to minimise the seepage lossses in canal
B)to prevent erosion of bed and sides due to high velocities
C)to increase the discharge in canal section by increasing the velocity
D)all of the above

Question 20

The movement of water through the soil surface into the soil, is called infilteration.

Question 21

Consumptive use of water by a crop is equal to

A)the depth of water consumed by evaporation
B)the depth of water consumed by transpiration
C)the depth of water consumed by evaporation and transpiration during crop growth, including water consumed by accompanying weed growth
D)none of the above

Question 22

The duty of irrigation water goes on

A)increasing
B)decreasing

Question 23

Which of the following is the correct sequence of the parts of a canal system?

A)Head works, distributary, branch canals and minor.
B)Head works, main canal, branch canal, distributary and minor.
C)Head works, main canal, branch canal, minor and distributary.
D)none of the above

Question 24

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

Question 25

The berms provide additional strength to banks and thus make it safe against breaches.