For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?

rabi and sugarcane or kharif and sugarcane

For a flood control reservoir, the effective storage is equal to_______________?

useful storage – valley storage

useful storage + surcharge storage

useful storage + surcharge storage + valley storage

useful storage + surcharge storage -valley storage

Coefficient of discharge of an ogee spillway________________?

depends on depth of approach and upstream slope

depends on downstream apron interference and downstream submergence

Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?

Both A and R are true but R is not the correct explanation of A

Both A and R are true and R is the correct explanation of A

Both A and R are true but R is not the correct explanation of A

As per Lacey’s theory, the silt factor is_________________?

not related to average particle size

directly proportional to average par¬ticle size

inversely proportional to average par¬ticle size

directly proportional to square root of average particle size

not related to average particle size

As compared to gravity dams, earthen dams__________________?

are less susceptible to failure

As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at_____________?

any of the above depending on the design

An artesian aquifer is the one where______________?

water table serves as upper surface of zone of saturation

water surface under the ground is at atmospheric pressure

water is under pressure between two impervious strata

water table serves as upper surface of zone of saturation

An aggrading river is a_________________?

both silting and scouring river

neither silting nor scouring river

A runoff river plant_________________?

generates power during peak hours only

is suitable only on a perennial river

A river bend characterized by silting_______________?

scouring on convex side and on concave side

scouring on concave side and silting on convex side

A multipurpose reservoir is the one which is_________________?

designed for one purpose but serves more than one purpose

planned and constructed to serve various purposes

A land is known as waterlogged_________________?

when the permanent wilting point is reached

when gravity drainage has ceased

capillary fringe reaches the root zone of plants

A divide wall is provided_______________?

parallel to the axis of weir and up-stream of it

at right angle to the axis of weir

parallel to the axis of weir and up-stream of it

parallel to the axis of weir and down-stream of it

at an inclination to the axis of weir

A deep well_________________?

is weaker structurally than a shallow well

is always deeper than a shallow well

has more discharge than a shallow well

is weaker structurally than a shallow well

If A is the area of the surface, x is the depth of its C.G. from the surface of the water and ω is the density of water, then

total pressure on the surface is equal to ω x

depth of the point at which total pressure acts is equal to its moment of inertia divided by A x

depth of the centre of pressure is 2/3H vertically below the surface

For a unique design of a channel by Kennedy's theory

its breadth and depth ratio must only be known

a sub-critical velocity meets a stream moving with a hyper-critical velocity.

its breadth and depth ratio must only be known

189 + Mcqs in Irrigation in Civil Engineering Page 3 McqOptions

101.	For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?
A.	rabi or kharif
B.	rabi and kharif or sugarcane
C.	rabi and sugarcane or kharif and sugarcane
D.	rabi or kharif or sugarcane
Answer» D. rabi or kharif or sugarcane

Discussion

102.	For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________________?
A.	N/(m+l)
B.	m/(N+l)
C.	m/N
D.	(N+l)/m
Answer» E.

Discussion

103.	For a proportional outlet, the flexibility is______________?
A.	zero
B.	between zero and 1
C.	1
D.	greater than 1
Answer» D. greater than 1

Discussion

104.	For a flood control reservoir, the effective storage is equal to_______________?
A.	useful storage – valley storage
B.	useful storage + surcharge storage
C.	useful storage + surcharge storage + valley storage
D.	useful storage + surcharge storage -valley storage
Answer» E.

Discussion

105.	For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?
A.	0.2 x 106
B.	0.6 x 106
C.	2.4 xlO6
D.	7.2 xlO6
Answer» B. 0.6 x 106

Discussion

106.	Dimensions of coefficient of transmissibility are______________?
A.	M°L°T°
B.	rvfL’T”1
C.	M° L2 T1
D.	M’LV
Answer» D. M’LV

Discussion

107.	Cyclonic precipitation is caused by lifting of an air mass due to________________?
A.	pressure difference
B.	temperature difference
C.	natural topographical barriers
D.	all of the above
Answer» B. temperature difference

Discussion

108.	Coefficient of discharge of an ogee spillway________________?
A.	depends on depth of approach and upstream slope
B.	depends on downstream apron interference and downstream submergence
C.	remains constant
D.	both (A) and (B)
Answer» E.

Discussion

109.	Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?
A.	Both A and R are true and R is the correct explanation of A
B.	Both A and R are true but R is not the correct explanation of A
C.	A is true but R is false
D.	A is false but R is true
Answer» B. Both A and R are true but R is not the correct explanation of A

Discussion

110.	As per Lacey’s theory, the silt factor is_________________?
A.	directly proportional to average par¬ticle size
B.	inversely proportional to average par¬ticle size
C.	directly proportional to square root of average particle size
D.	not related to average particle size
Answer» D. not related to average particle size

Discussion

111.	As compared to gravity dams, earthen dams__________________?
A.	are costlier
B.	are less susceptible to failure
C.	require sound rock foundations
D.	require less skilled labour
Answer» E.

Discussion

112.	As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at_____________?
A.	lower level
B.	higher level
C.	same level
D.	any of the above depending on the design
Answer» B. higher level

Discussion

113.	An artesian aquifer is the one where______________?
A.	water surface under the ground is at atmospheric pressure
B.	water is under pressure between two impervious strata
C.	water table serves as upper surface of zone of saturation
D.	none of the above
Answer» C. water table serves as upper surface of zone of saturation

Discussion

114.	An aggrading river is a_________________?
A.	silting river
B.	scouring river
C.	both silting and scouring river
D.	neither silting nor scouring river
Answer» B. scouring river

Discussion

115.	According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is_____________?
A.	0
B.	unity
C.	infinity
D.	very large
Answer» D. very large

Discussion

116.	A unit hydro graph has one unit of_______________?
A.	rainfall duration
B.	rainfall excess
C.	time base of direct runoff
D.	discharge
Answer» C. time base of direct runoff

Discussion

117.	A straight glacis type fall with a baffle platform and a baffle wall is called_____________?
A.	vertical dropfall
B.	glacis fall
C.	Montague type fall
D.	inglis fall
Answer» E.

Discussion

118.	A runoff river plant_________________?
A.	is a medium head scheme
B.	generates power during peak hours only
C.	is suitable only on a perennial river
D.	has no pondage at all
Answer» D. has no pondage at all

Discussion

119.	A runoff river plant is____________?
A.	a low head scheme
B.	a medium head scheme
C.	a high head scheme
D.	none of the above
Answer» B. a medium head scheme

Discussion

120.	A river training work is generally required when the river is_______________?
A.	aggrading type
B.	degrading type
C.	meandering type
D.	both (A) and (B)
Answer» D. both (A) and (B)

Discussion

121.	A river bend characterized by silting_______________?
A.	scouring on concave side
B.	silting on convex side
C.	scouring on convex side and on concave side
D.	scouring on concave side and silting on convex side
Answer» E.

Discussion

122.	A repelling groyne is aligned________________?
A.	pointing upstream
B.	pointing downstream
C.	perpendicular to bank
D.	parallel to bank
Answer» B. pointing downstream

Discussion

123.	A raingauge should preferably be fixed________________?
A.	near the building
B.	under the tree
C.	in an open space
D.	in a closed space
Answer» D. in a closed space

Discussion

124.	A multipurpose reservoir is the one which is_________________?
A.	designed for one purpose but serves more than one purpose
B.	planned and constructed to serve various purposes
C.	both (A. and (B.
D.	none of the above
Answer» C. both (A. and (B.

Discussion

125.	A land is known as waterlogged_________________?
A.	when the permanent wilting point is reached
B.	when gravity drainage has ceased
C.	capillary fringe reaches the root zone of plants
D.	none of the above
Answer» D. none of the above

Discussion

126.	A hyetograph is a graphical representation of___________________?
A.	rainfall intensity and time
B.	rainfall depth and time
C.	discharge and time
D.	cumulative rainfall and time
Answer» B. rainfall depth and time

Discussion

127.	A hydroelectric scheme operating under a head of 80 m will be classified as_____________?
A.	low head scheme
B.	medium head scheme
C.	high head scheme
D.	none of the above
Answer» D. none of the above

Discussion

128.	A divide wall is provided_______________?
A.	at right angle to the axis of weir
B.	parallel to the axis of weir and up-stream of it
C.	parallel to the axis of weir and down-stream of it
D.	at an inclination to the axis of weir
Answer» B. parallel to the axis of weir and up-stream of it

Discussion

129.	A deep well_________________?
A.	is always deeper than a shallow well
B.	has more discharge than a shallow well
C.	is weaker structurally than a shallow well
D.	both (A) and (B)
Answer» C. is weaker structurally than a shallow well

Discussion

130.	A current meter is used to measure the__________________?
A.	velocity of flow of water
B.	depth of flow of water
C.	discharge
D.	none of the above
Answer» B. depth of flow of water

Discussion

131.	A 70% index of wetness means_______________?
A.	rain excess of 30%
B.	rain deficiency of 30%
C.	rain deficiency of 70%
D.	none of the above
Answer» C. rain deficiency of 70%

Discussion

132.	If Dc is the critical depth, D is the depth of water down stream and HL is the total head loss at the cistern of a vertical fall, the depth x of the cistern below the bed level down stream suggested by Blench, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

133.	If q is the discharge per unit width of a channel and D1 D2 are the depths of water before and after hydraulic jump, the following relationship is true
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

134.	If D1 and D2 are depths of water upstream and down stream of a hydraulic jump, the loss of head at the jump, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» E.

Discussion

135.	If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor down stream of the crestwall, is given by the equation
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

136.	If A is the area of the surface, x is the depth of its C.G. from the surface of the water and ω is the density of water, then
A.	total pressure on the surface is equal to ω x
B.	depth of the point at which total pressure acts is equal to its moment of inertia divided by A x
C.	depth of the centre of pressure is 2/3H vertically below the surface
D.	all the above.
Answer» E.

Discussion

137.	If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle θ with horizontal, the hydraulic mean depth is
A.	D
B.	D/2
C.	D/3
D.	D/4
E.	D/5
Answer» C. D/3

Discussion

138.	If L is total length of a canal in kilometres, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is
A.	1000 PLC
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

Discussion

139.	V and R are the regime mean velocity and hydraulic mean depth respectively in metres. Lacey's silt factor f is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» D. [D].

Discussion

140.	If B and d are the bed width and depth of a channel in metres, the combined losses due to evaporation and seepage in cumecs per kilometre length of the channel, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» E.

Discussion

141.	If V0 is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	[E].
Answer» D. [D].

Discussion

142.	Trial procedure of canal design by Kennedy's theory is based upon the equation
A.	Q = A . Y
B.	[B].
C.	[C].
D.	all the above.
Answer» E.

Discussion

143.	According to Kennedy, the critical velocity (V0) in metres in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» C. [C].

Discussion

144.	If Δ is the depth of water in metres, B is the number of days of base period and D is the duty in hactare/cumec, the relationship which holds good, is
A.	[A].
B.	[B].
C.	[C].
D.	[D].
E.	none of these.
Answer» E. none of these.

Discussion

145.	For a unique design of a channel by Kennedy's theory
A.	a sub-critical velocity meets a stream moving with a hyper-critical velocity.
B.	its breadth must only be known
C.	its depth must only be known
D.	its breadth and depth ratio must only be known
Answer» D. its breadth and depth ratio must only be known

Discussion

146.	A minimum of 90 cm free board is provided if the discharge in the canal is between
A.	contour canals
B.	ridge canals.
C.	30 to 33 cumecs
D.	30 to 60 cumecs
Answer» D. 30 to 60 cumecs

Discussion

147.	Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less
A.	none of these.
B.	populated area
C.	alkaline area
D.	forest area
Answer» E.

Discussion

148.	When a canal is carried over a natural drainage, the structure provided, is known as
A.	25 cumecs.
B.	syphon
C.	aqueduct
D.	super passage
Answer» C. aqueduct

Discussion

149.	If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle Œ∏ with horizontal, the perimeter of the canal is
A.	none of these.
B.	R(Œ∏ + tan Œ∏)
C.	2R(Œ∏ + tan Œ∏)
D.	R(Œ∏ + cos Œ∏)
Answer» E.

Discussion

150.	The top soil of a water logged field becomes more alkaline and infertile if its pH value is
A.	none of these.
B.	6
C.	8
D.	9
Answer» E.

Discussion

Explore topic-wise MCQs in Civil Engineering.

For supplying water to rabi crop, kharif crop and sugarcane, the channel is designed for a capacity equal to the greater of the water requirement of_______________?

For an annual flood series arranged in descending order of magnitude, the return for a magnitude listed at position period m in a total data N is________________?

For a proportional outlet, the flexibility is______________?

For a flood control reservoir, the effective storage is equal to_______________?

For a catchment area of 120 km2, the equilibrium discharge in m3/hour of an S-curve obtained by the summation of 6 hour unit hydro graph is_______________?

Dimensions of coefficient of transmissibility are______________?

Cyclonic precipitation is caused by lifting of an air mass due to________________?

Coefficient of discharge of an ogee spillway________________?

Assertion A : To estimate the rainfall over a catchment, the number of raingauges required per unit area is large for hilly areas. Reason R : Rainfall gradient is steep. Select your correct answer according to the coding system given below ?

As per Lacey’s theory, the silt factor is_________________?

As compared to gravity dams, earthen dams__________________?

As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at_____________?

An artesian aquifer is the one where______________?

An aggrading river is a_________________?

According to Khosla’s theory, the exit gradient in the absence of a downstream cutoff is_____________?

A unit hydro graph has one unit of_______________?

A straight glacis type fall with a baffle platform and a baffle wall is called_____________?

A runoff river plant_________________?

A runoff river plant is____________?

A river training work is generally required when the river is_______________?

A river bend characterized by silting_______________?

A repelling groyne is aligned________________?

A raingauge should preferably be fixed________________?

A multipurpose reservoir is the one which is_________________?

A land is known as waterlogged_________________?

A hyetograph is a graphical representation of___________________?

A hydroelectric scheme operating under a head of 80 m will be classified as_____________?

A divide wall is provided_______________?

A deep well_________________?

A current meter is used to measure the__________________?

A 70% index of wetness means_______________?

If Dc is the critical depth, D is the depth of water down stream and HL is the total head loss at the cistern of a vertical fall, the depth x of the cistern below the bed level down stream suggested by Blench, is

If q is the discharge per unit width of a channel and D1 D2 are the depths of water before and after hydraulic jump, the following relationship is true

If D1 and D2 are depths of water upstream and down stream of a hydraulic jump, the loss of head at the jump, is

If the height of the hydraulic gradient line above the floor of thickness t is h and the specific gravity of the material of the floor is G, the minimum thickness t of the floor down stream of the crestwall, is given by the equation

If A is the area of the surface, x is the depth of its C.G. from the surface of the water and ω is the density of water, then

If the straight sides of a triangular section of a lined canal with circular bottom of radius D, make an angle θ with horizontal, the hydraulic mean depth is

If L is total length of a canal in kilometres, P is total perimeter of its lining in metres and C is the cost of lining per square metre, the additional expenditure involved on lining, is

V and R are the regime mean velocity and hydraulic mean depth respectively in metres. Lacey's silt factor f is

If B and d are the bed width and depth of a channel in metres, the combined losses due to evaporation and seepage in cumecs per kilometre length of the channel, is

If V0 is the critical velocity of a channel, its silt transporting power, according to Kennedy, is proportional to

Trial procedure of canal design by Kennedy's theory is based upon the equation

According to Kennedy, the critical velocity (V0) in metres in a channel is the mean velocity which keeps the channel free from silting or scouring. Its value is given by (where m is critical velocity ratio and D is the depth of the channel).

If Δ is the depth of water in metres, B is the number of days of base period and D is the duty in hactare/cumec, the relationship which holds good, is

For a unique design of a channel by Kennedy's theory

A minimum of 90 cm free board is provided if the discharge in the canal is between

Pick up the incorrect statement from the following. Culturable commanded area is the gross area of an irrigation canal system less

When a canal is carried over a natural drainage, the structure provided, is known as

If the straight sides of a triangular section of a lined canal with circular bottom of radius R, make an angle Œ∏ with horizontal, the perimeter of the canal is

The top soil of a water logged field becomes more alkaline and infertile if its pH value is