# Irrigation Engineering Set 12

This set of Irrigation Engineering Multiple Choice Questions & Answers (MCQs) focuses on Irrigation Engineering Set 12

Q1 | Garret's diagram gives the graphical method of designing a channel based on
• Lacey's theory
• Gibb's theory
• Kennedy's theory
• Khosla's theory
Q2 | The fall which can be used as a meter fall, is
• vertical drop fall
• flumed glacis fall
• unflumed glacis fall
• none of these
Q3 | A canal aligned roughly at right angles to the contours of the country is called ridge canal.
• TRUE
• FALSE
Q4 | According to Fanning's formula, the flood discharge (Q) in cumecs is given by
• Q = CA2/3
• Q = CA3/4
• Q = CA5/6
• Q = CA7/8
Q5 | Super-fluous water is also called
• capillary water
• gravitational water
• hygroscopic water
• all of these
Q6 | The hydrology is a science which deals with the
• occurrence of water on the earth
• distribution of water on the earth
• movement of water on the earth
• all of these
Q7 | The ratio between the depths of water levels over crest on the downstream and upstream of the module, is known as
• flexibility
• sensitivity
• drowning ratio
• module ratio
Q8 | The duty of irrigation water will be less if
• area irrigated is more
• water supply required is less
• water supply required is more
• none of these
Q9 | The width and length of mender as well as width of river, vary approximately with
• discharge
• square of discharge
• square root of discharge
• cube root of discharge
Q10 | In the case of a proportional outlet, the setting is equal to the ratio of outlet index to the channel index.
• Correct
• Incorrect
Q11 | The cylinder or well fall is quite suitable and economical for
• low discharges and low drops
• low discharges and high drops
• high discharges and low drops
• high discharges and high drops
Q12 | 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
Q13 | A sudden fall of level of ground along the alignment of a canal joined by an inclined bed is called a
• rapid fall
• cylinder fall
• sudden fall
• hydraulic jump
Q14 | Capillary water is a useful soil moisture for the growth of plants.
• Yes
• No
Q15 | The area in which crop is grown at a particular time or crop season, is called
• gross commanded area
• culturable commanded area
• culturable uncultivated area
• none of these
Q16 | The standard height of a standard rain gauge is
• 10 cm
• 20 cm
• 30 cm
• 40 cm
Q17 | The saturation gradient in an ordinary loam soil is
• 1 ; 1
• 2 ; 1
• 3 ; 1
• 4 ; 1
Q18 | The field capacity of a soil depends upon
• capillary tension in soil
• porosity of soil
• either (a) or (b)
• both (a) and (b)
Q19 | For the repairing of an old but sound concrete lining, the lining preferred is
• shotcrete lining
• precast concrete lining
• soil cement lining
• sodium carbonate lining
Q20 | The term balancing depth has the same meaning as the depth of water in canal.
• Right
• Wrong
Q21 | When the critical velocity ratio is less than one, the channel is said to be in silting.
• TRUE
• FALSE
Q22 | For potato, sugarcane and groundnut, the furrow method of irrigation is adopted.
• Yes
• No
Q23 | Where steep land is available, the method of irrigation adopted is
• free flooding
• border flooding
• check flooding
• basin flooding
Q24 | A channel is said to be in scouring when the critical velocity ratio is
• equal to
• less than
• greater than
Q25 | In case of small channels, the borrow pits should start from a distance not less than
• 2 m
• 3 m
• 4 m
• 5 m