Deck 9: Irrigation and Hydraulic Engineering

Question 1

A baffle wall is a sort of low weir constructed at the end of the cistern to

A)head up water to its upstream to such a height that hydraulic jump is formed
B)withstand the actual impact of the high velocity jet to dissipate the energy
C)both (a) and (b)
D)none of the above

Answer 1

both (a) and (b)

Question 2

The function of a barrage is different to that a weir.

Answer 2

False

Question 3

The irrigation engineering may be defined as

A)the process of artificially supplying water to soil for raising crops
B)a science of planning and designing an efficient and economic irrigation system
C)the engineering of controlling and harnessing the various natural sources of water, by the construction of dams, canals and finally distributing the water to the agricultural fields
D)all of the above

Answer 3

all of the above

Question 4

Liquid precipitation consists of

A)snow
B)hail
C)sleet
D)rainfall

Question 5

The main cause of silting in channel is

A)non-regime section
B)inadequate slope
C)defective head regulator
D)all of these

Question 6

Lacey's theory as applied to channel design, involves trial and error procedure.

Question 7

The ratio between the area of a crop irrigated and the quantity of water required during its entire period of the growth, is known as

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

Question 8

The loss of head per unit length of creep is called

A)coefficient of creep
B)percolation coefficient
C)Lane's coefficient
D)none of these

Question 9

The basic factor which controls the process of meandering is

A)discharge
B)valley slope
C)bed and side resistance
D)all of these

Question 10

In a flexible outlet, the discharge depends upon the

A)water level in distributary
B)water level in water course
C)difference of water levels between distributary and water course
D)none of the above

Question 11

A river meandering through an alluvial plain has a series of consecutive curves of reversed order connected with short straight sketches, is called

A)crossing
B)meandering belt
C)meandering length
D)none of these

Question 12

The water shed canal is also called

A)side slope canal
B)contour canal
C)ridge canal
D)all of these

Question 13

In an Inglis type fall, the baffle holds the jump stable on a horizontal platform.

Question 14

The borrow pits should, preferably, be taken from

A)the field on the right side of canal
B)the field on the left side of the canal
C)the central half width of the section of the canal
D)any one of the above

Question 15

Rivers on alluvial plains may be

A)meandering type
B)aggrading type
C)degrading type
D)all of these

Question 16

A canal sligned nearly parallel to the contours of a country, is known as

A)side slope canal
B)contour canal
C)water shed canal
D)ridge canal

Question 17

The duty at outlet is called capacity factor.

Question 18

The duty is largest

A)at the head of the main canal
B)at the head of the water course
C)on the field
D)at all place

Question 19

The knowledge of hydrology is necessary in civil engineering for

A)designing and construction of irrigation structures
B)designing and construction of bridges and culverts
C)flood control works
D)all of these

Question 20

Nawab Jang Bahadur formula is used to estimate the flood discharge of American catchments

Question 21

For closed growing crops (such as wheat), the method of irrigation used is

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

Question 22

The crest of the under-sluices should be lower than the crest of the head regulator (if silt excluder is provided by at least

A)1 to 1.2 m
B)1.8 to 2 m
C)2 to 2.5 m
D)4 to 5 m

Question 23

In Bligh's creep theory, it is assumed that the percolation water creep

A)along the contact of the base profile of the apron with the sub-soil
B)in a straight path under the floor
C)in a straight path under the foundation work
D)none of the above

Question 24

When the irrigation canal and the drain are at the same level, then the cross drainage work is achieved by providing a

A)aqueduct
B)super-passage
C)level crossing
D)canal syphon

Question 25

The amount of precipitation is measured by

A)rain gauge
B)osmoscope
C)turbidimeter
D)all of these