The irrigation is necessary in an area

where there is a scanty rainfall

where the rainfall is non-uniform

where commercial crops require more water

A weir is generally aligned at right angle to the direction of the main river flow because

less length of weir is required

it gives better discharge capacity

The infertility of the soil in water-logged areas is due to

inhibiting activity of the soil bacteria

The river training works are adopted on a river

to pass high flood discharge safely and quickly through the breach

to direct and guide the river flow

to reduce bank erosion to a minimum

The berms when fully formed

reduce the absorption losses and prevents leaks

protect the bank from erosion because of wave action

provide a scope for future widening the channel

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

more cross drainage works are required

a costly head regulator is required

more falls are necessary to dissipate the energy

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

much below the bottom of the canal trough

much higher above the canal bed

The width of meandering belt is the

transverse distance between the apex point of one curve and apex point on reverse curve

axial distance along the river between tangent point of one curve and tangent point of other curve of same order

axial distance along the river between the apex point of one curve and apex point on reverse curve

transverse distance along the river between tangent point of one curve and tangent point of other curve of same order

The function of a scouring sluice is

to control the silt entry into the canal

to scour the silt deposited in the river bed above the approach channel

to pass the low floods without dropping the shutters of the main weir

The hydrology is a science which deals with the

occurrence of water on the earth

distribution of water on the earth

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

rate of change of discharge of an outlet to the rate of change of discharge of the distributing channel

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

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

head recovered to the head put in an outlet

246 + Mcqs in General in Irrigation Engineering Page 2 McqOptions

51.	A solid construction put across the river to raise its water level and divert the water into the canal, is known as
A.	marginal bund
B.	weir
C.	barrage
D.	dam
Answer» C. barrage

Discussion

52.	Which of the following is a type of non-modular outlet?
A.	Submerged pipe outlet
B.	Open-flume outlet
C.	Kennedy's gauge outlet
D.	all of these
Answer» B. Open-flume outlet

Discussion

53.	The irrigation is necessary in an area
A.	where there is a scanty rainfall
B.	where the rainfall is non-uniform
C.	where commercial crops require more water
D.	all of the above
Answer» E.

Discussion

54.	A deflecting groyne in a river is
A.	inclined towards upstream
B.	perpendicular to bank
C.	inclined towards downstream
D.	none of these
Answer» C. inclined towards downstream

Discussion

55.	Sprinklar irrigation is adopted for
A.	level
B.	uneven
C.	hilly
Answer» C. hilly

Discussion

56.	A weir is generally aligned at right angle to the direction of the main river flow because
A.	it is economical
B.	less length of weir is required
C.	it gives better discharge capacity
D.	all of these
Answer» E.

Discussion

57.	The infertility of the soil in water-logged areas is due to
A.	inhibiting activity of the soil bacteria
B.	growth of weeds
C.	increasing of harmful salts
D.	all of these
Answer» E.

Discussion

58.	For the pipe outlet to be proportional, the outlet is set at
A.	0.3 times
B.	0.5 times
C.	0.8 times
Answer» B. 0.5 times

Discussion

59.	A useful soil moisture for plant growth is
A.	capillary water
B.	gravitational water
C.	hygroscopic water
D.	all of these
Answer» B. gravitational water

Discussion

60.	The smooth entry, the regulators are aligned at an angle of
A.	60?
B.	80?
C.	110?
D.	130?
Answer» D. 130?

Discussion

61.	The length of groyne depends upon the magnitude of river training required.
A.	Right
B.	Wrong
Answer» B. Wrong

Discussion

62.	Irrigation is supplementary to rainfall.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

63.	In a Sarda type fall, the trapezoidal crest is used for discharges over 14 m3/s.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

64.	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
Answer» E.

Discussion

65.	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
Answer» E.

Discussion

66.	Non-silting, non-scouring velocity is called
A.	mean
B.	critical
Answer» C.

Discussion

67.	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» E.

Discussion

68.	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
Answer» E.

Discussion

69.	Irrigation
A.	increases
B.	decreases
Answer» B. decreases

Discussion

70.	Trough stage of river is most suitable location for diversion head works.
A.	Yes
B.	No
Answer» B. No

Discussion

71.	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
Answer» C. in level with the canal bed

Discussion

72.	The flexibility of a sub-proportional outlet is less than one
A.	Yes
B.	No
Answer» B. No

Discussion

73.	In level crossing, the water level of canal is much higher than that of the drainage.
A.	True
B.	False
Answer» C.

Discussion

74.	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
Answer» B. axial distance along the river between tangent point of one curve and tangent point of other curve of same order

Discussion

75.	Lacey assumed a trapezoidal cross-section of a regime channel
A.	Yes
B.	No
Answer» C.

Discussion

76.	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
Answer» B. dowel

Discussion

77.	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
Answer» E.

Discussion

78.	The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, are
A.	Only (ii)
B.	(i), (ii) and (iii)
C.	(i), (ii) and (iv)
D.	(i), (ii), (iii) and (iv)
Answer» B. (i), (ii) and (iii)

Discussion

79.	When the critical velocity ratio is less than one, the channel is said to be in silting.
A.	True
B.	False
Answer» B. False

Discussion

80.	A canal aligned roughly at right angles to the contours of the country is called ridge canal.
A.	True
B.	False
Answer» C.

Discussion

81.	The hydrology is a science which deals with the
A.	occurrence of water on the earth
B.	distribution of water on the earth
C.	movement of water on the earth
D.	all of these
Answer» E.

Discussion

82.	The ratio between the depths of water levels over crest on the downstream and upstream of the module, is known as
A.	flexibility
B.	sensitivity
C.	drowning ratio
D.	module ratio
Answer» D. module ratio

Discussion

83.	The fall which can be used as a meter fall, is
A.	vertical drop fall
B.	flumed glacis fall
C.	unflumed glacis fall
D.	none of these
Answer» B. flumed glacis fall

Discussion

84.	The cylinder or well fall is quite suitable and economical for
A.	low discharges and low drops
B.	low discharges and high drops
C.	high discharges and low drops
D.	high discharges and high drops
Answer» C. high discharges and low drops

Discussion

85.	Super-fluous water is also called
A.	capillary water
B.	gravitational water
C.	hygroscopic water
D.	all of these
Answer» C. hygroscopic water

Discussion

86.	The standard height of a standard rain gauge is
A.	10 cm
B.	20 cm
C.	30 cm
D.	40 cm
Answer» D. 40 cm

Discussion

87.	According to Fanning's formula, the flood discharge (Q) in cumecs is given by
A.	Q = CA2/3
B.	Q = CA3/4
C.	Q = CA5/6
D.	Q = CA7/8
Answer» D. Q = CA7/8

Discussion

88.	Where steep land is available, the method of irrigation adopted is
A.	free flooding
B.	border flooding
C.	check flooding
D.	basin flooding
Answer» B. border flooding

Discussion

89.	A channel is said to be in scouring when the critical velocity ratio is
A.	equal to
B.	less than
C.	greater than
Answer» D.

Discussion

90.	The setting 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
Answer» D. head recovered to the head put in an outlet

Discussion

91.	For potato, sugarcane and groundnut, the furrow method of irrigation is adopted.
A.	Yes
B.	No
Answer» B. No

Discussion

92.	For the repairing of an old but sound concrete lining, the lining preferred is
A.	shotcrete lining
B.	precast concrete lining
C.	soil cement lining
D.	sodium carbonate lining
Answer» B. precast concrete lining

Discussion

93.	The saturation gradient in an ordinary loam soil is
A.	1 ; 1
B.	2 ; 1
C.	3 ; 1
D.	4 ; 1
Answer» E.

Discussion

94.	The duty of irrigation water will be less if
A.	area irrigated is more
B.	water supply required is less
C.	water supply required is more
D.	none of these
Answer» D. none of these

Discussion

95.	Capillary water is a useful soil moisture for the growth of plants.
A.	Yes
B.	No
Answer» B. No

Discussion

96.	The width and length of mender as well as width of river, vary approximately with
A.	discharge
B.	square of discharge
C.	square root of discharge
D.	cube root of discharge
Answer» D. cube root of discharge

Discussion

97.	Garret's diagram gives the graphical method of designing a channel based on
A.	Lacey's theory
B.	Gibb's theory
C.	Kennedy's theory
D.	Khosla's theory
Answer» D. Khosla's theory

Discussion

98.	The method of irrigation used for orchards is
A.	free flooding
B.	border flooding
C.	check flooding
D.	basin flooding
Answer» E.

Discussion

99.	A sudden fall of level of ground along the alignment of a canal joined by an inclined bed is called a
A.	rapid fall
B.	cylinder fall
C.	sudden fall
D.	hydraulic jump
Answer» B. cylinder fall

Discussion

100.	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
Answer» C. pipe fall

Discussion

Explore topic-wise MCQs in Irrigation Engineering.

A solid construction put across the river to raise its water level and divert the water into the canal, is known as

Which of the following is a type of non-modular outlet?

The irrigation is necessary in an area

A deflecting groyne in a river is

Sprinklar irrigation is adopted for

A weir is generally aligned at right angle to the direction of the main river flow because

The infertility of the soil in water-logged areas is due to

For the pipe outlet to be proportional, the outlet is set at

A useful soil moisture for plant growth is

The smooth entry, the regulators are aligned at an angle of

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

Irrigation is supplementary to rainfall.

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

The river training works are adopted on a river

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

Non-silting, non-scouring velocity is called

The berms when fully formed

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

Irrigation

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

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

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

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

The width of meandering belt is the

Lacey assumed a trapezoidal cross-section of a regime channel

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

The function of a scouring sluice is

The forces, which are considered for the analysis of an elementary profile of a gravity dam under empty reservoir condition, are

When the critical velocity ratio is less than one, the channel is said to be in silting.

A canal aligned roughly at right angles to the contours of the country is called ridge canal.

The hydrology is a science which deals with the

The ratio between the depths of water levels over crest on the downstream and upstream of the module, is known as

The fall which can be used as a meter fall, is

The cylinder or well fall is quite suitable and economical for

Super-fluous water is also called

The standard height of a standard rain gauge is

According to Fanning's formula, the flood discharge (Q) in cumecs is given by

Where steep land is available, the method of irrigation adopted is

A channel is said to be in scouring when the critical velocity ratio is

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

For potato, sugarcane and groundnut, the furrow method of irrigation is adopted.

For the repairing of an old but sound concrete lining, the lining preferred is

The saturation gradient in an ordinary loam soil is

The duty of irrigation water will be less if

Capillary water is a useful soil moisture for the growth of plants.

The width and length of mender as well as width of river, vary approximately with

Garret's diagram gives the graphical method of designing a channel based on

The method of irrigation used for orchards is

A sudden fall of level of ground along the alignment of a canal joined by an inclined bed is called a

When the water is thrown into a well over a crest from where it escapes near its bottom, the type of fall is called