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

Head works, distributary, branch canals and minor.

Head works, main canal, branch canal, distributary and minor.

Head works, main canal, branch canal, minor and distributary.

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

three for vertical creep and one for horizontal creep

three for horizontal creep and one for vertical creep

two for vertical and two for horizontal creep

A diversion head work is constructed to

raise water level at the head of the canal

regulate the intake of water into the canal

reduce fluctuations in the supply level of the river

Cyclonic precipitation results from

lifting of air masses converging into low pressure area

natural rising of warmer, lighter air in colder and denser surrondings

lifting of warm moisture-laden air masses due to topographic barriers

Lining of a canal is necessary

to minimise the seepage lossses in canal

to prevent erosion of bed and sides due to high velocities

to increase the discharge in canal section by increasing the velocity

Consumptive use of water by a crop is equal to

the depth of water consumed by evaporation

the depth of water consumed by transpiration

the depth of water consumed by evaporation and transpiration during crop growth, including water consumed by accompanying weed growth

The alignment of a canal

should be such, so as to ensure minimum number of cross drainage works

on a water shed is the most economical

should avoid valuable properties

is most suitable in hilly areas

is aligned parallel to the contour of the country

In a super-passage, the F.S.L. of the canal is

above the bed level of the drainage trough

lower than the underside of the trough carrying drainage water

above the bed level of the drainage trough

in level with the drainage trough

The measure adopted to reclaim the water-logged area is

installation of lift irrigation schemes

A spoil bank is formed when the

volume of excavation is in excess of the embankment filling

increases the water surface elevation of the river at flood

decreases the surface slope of the stream above the leveed portion

increases the velocity and scouring action through leveed section

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

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

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 3 McqOptions

101.	The channel after attaining its section and longitudinal slope, will be said to be in
A.	initial
B.	final
C.	permanent
Answer» C. permanent

102.	The ratio of the hed recovered to the head put in an outlet, is called
A.	proportionality
B.	flexibility
C.	sensitivity
D.	efficiency
Answer» E.

103.	The berms provide additional strength to banks and thus make it safe against breaches.
A.	True
B.	False
Answer» B. False

104.	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
Answer» C. Head works, main canal, branch canal, minor and distributary.

105.	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
Answer» B. three for horizontal creep and one for vertical creep

106.	The gaps created in the bank of a canal is called a breach.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

107.	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
Answer» E.

108.	The duty of irrigation water goes on
A.	increasing
B.	decreasing
Answer» B. decreasing

109.	Inundation canals draw their supplies from rivers whenever there is a
A.	low
B.	high
C.	medium
Answer» C. medium

110.	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
Answer» B. natural rising of warmer, lighter air in colder and denser surrondings

111.	The earth's water circulatory system, is known as
A.	water cycle
B.	hydrologic cycle
C.	precipitation cycle
D.	all of these
Answer» C. precipitation cycle

112.	The discharge (Q) over trapezoidal crest of Sarda fall is
A.	same
B.	less
C.	more
Answer» D.

115.	Escapes are also known as
A.	outlet
B.	safety valves
C.	regulators
Answer» C. regulators

116.	The setting for a hyper-proportional outlet is
A.	more
B.	same
Answer» B. same

117.	Kennedy gave his own formula for the determination of mean velocity.
A.	Correct
B.	Incorrect
Answer» C.

113.	The ratio of the head recovered to the head put in an outlet, is called
A.	proportionality
B.	flexibility
C.	sensitivity
D.	efficiency
Answer» E.

114.	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
Answer» E.

118.	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
Answer» D. none of the above

119.	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
Answer» E.

120.	If the critical shear stress of a channel is xc, then the average value of shear stress required to move the grain on the bank is
A.	0.5 xc
B.	0.75 TC
C.	xc
D.	1.33 TC
Answer» C. xc

121.	An outlet is said to be proportional, if its flexibility is
A.	equal to zero
B.	less than unity
C.	equal to unity
D.	more than unity
Answer» D. more than unity

122.	A contour canal
A.	is most suitable in hilly areas
B.	irrigates only on one side
C.	is aligned parallel to the contour of the country
D.	all of the above
Answer» E.

123.	A hydrograph representing one cm of run off from a rainfall of some unit duration and specific area distribution is known as
A.	hyetograph
B.	flood hydrograph
C.	unit hydrograph
D.	S-hydrograph
Answer» D. S-hydrograph

124.	The level of a canal diversion head work depends upon
A.	discharge perimeter
B.	pond level
C.	full supply level of canal
D.	all of these
Answer» E.

125.	In Sarda type fall, the length of the crest is kept
A.	more than
B.	equal to
C.	less than
Answer» C. less than

Explore topic-wise MCQs in Irrigation Engineering.

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

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

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

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

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

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

A diversion head work is constructed to

The duty of irrigation water goes on

Inundation canals draw their supplies from rivers whenever there is a

Cyclonic precipitation results from

The earth's water circulatory system, is known as

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

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

Lining of a canal is necessary

Escapes are also known as

The setting for a hyper-proportional outlet is

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

Consumptive use of water by a crop is equal to

The alignment of a canal

If the critical shear stress of a channel is xc, then the average value of shear stress required to move the grain on the bank is

An outlet is said to be proportional, if its flexibility is

A contour canal

A hydrograph representing one cm of run off from a rainfall of some unit duration and specific area distribution is known as

The level of a canal diversion head work depends upon

In Sarda type fall, the length of the crest is kept

Kennedy, in his silt theory, assumed that the silt is kept in suspension because of eddies generated from the

A part of water which exists in the porous space of the soil by molecular attraction, is known as

Sandy soils with good drainage become impermeable after prolonged use, if it is irrigated with a water containing

According to Kennedy, the silt supporting power is

The weed growth in a canal leads to

Gibb's module is a type of

In a super-passage, the F.S.L. of the canal is

Water logging is caused due to

The measure adopted to reclaim the water-logged area is

When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the under side of the supporting structure, the structure provided is super-passage.

For a discharge of 4m3/s in Sarda type fall,

When an oven-dried sample of soil is kept open in the atmosphere, it absorbs some amount of water. This water is known as

A canal aligned at right angles to the contour of a country, is known as

Presence of tail water in a gravity dam

The uplift pressure on a dam can be controlled by

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 spoil bank is formed when the

When the full supply level (F.S.L.) of the canal is much below the bed level of the drainage trough, then the cross drainage provided is called syphon aqueduct.

When the drain is over the canal, the structure provided is known as

The primary cause of meandering is the excess of total charge during floods, when excess of turbulence is developed.

A levee on flood

The crest level in a barrage is kept at a

To estimate the magnitude of a flood with a return period of T years, Gumbel's distribution method requires the following data pertaining to annual flood series

In order to estimate the high flood discharge in fan-shaped catchment, the formula used is

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

126.	Kennedy, in his silt theory, assumed that the silt is kept in suspension because of eddies generated from the
A.	bed only
B.	sides only
C.	whole perimeter
D.	any one of these
Answer» B. sides only

127.	A part of water which exists in the porous space of the soil by molecular attraction, is known as
A.	capillary water
B.	gravitational water
C.	hygroscopic water
D.	all of these
Answer» B. gravitational water

128.	Sandy soils with good drainage become impermeable after prolonged use, if it is irrigated with a water containing
A.	25%
B.	50%
C.	75%
D.	85%
Answer» E.

129.	According to Kennedy, the silt supporting power is
A.	directly proportional to
B.	inversely proportional to
Answer» B. inversely proportional to

130.	The weed growth in a canal leads to
A.	decrease in silting
B.	decrease in discharge
C.	increase in discharge
D.	increase in velocity of flow
Answer» C. increase in discharge

131.	Gibb's module is a type of
A.	non-moduler outlet
B.	semi-modular outlet
C.	rigid modular outlet
D.	upon flume outlet
Answer» D. upon flume outlet

132.	In a super-passage, the F.S.L. of the canal is
A.	lower than the underside of the trough carrying drainage water
B.	above the bed level of the drainage trough
C.	in level with the drainage trough
D.	none of the above
Answer» B. above the bed level of the drainage trough

133.	Water logging is caused due to
A.	inadequate drainage facilities
B.	over irrigation
C.	presence of impermeable strata
D.	all of these
Answer» E.

134.	The measure adopted to reclaim the water-logged area is
A.	installation of lift irrigation schemes
B.	lining of canals
C.	lowering the full supply level
D.	all of these
Answer» B. lining of canals

135.	When a canal flowing under pressure is carried below a natural drainage such that its F.S.L. does not touch the under side of the supporting structure, the structure provided is super-passage.
A.	Correct
B.	Incorrect
Answer» B. Incorrect