Online Quiz Irrigation,Water Resources Engineering and Hydrology Test1

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1. Which of the following methods of applying water may be used on rolling land ?
boarder flooding	check flooding
furrow flooding	free flooding

2. The value of Sodium Absorption Ratio for high sodium water lies between _____.
0 to 10	10 to 18
18 to 26	26 to 34

3. Optimum depth of kor watering for rice is _____.
135 mm	165 mm
190 mm	215 mm

4. Irrigation water having the concentration of Na++ , Ca++ and Mg++ as 20, 3 and 1 milliequivalent per litre respectively will be classified as
low sodium water	medium sodium water
high sodium water	very high sodium water

5. The duty is largest ________.
at the head of water course	on the field
at the head of a main canal	same at all places

6. The "outlet discharge factor" is the duty at the head of ______.
main canal	branch canal
watercourse	distributory

7. The kor depth for rice is 190 mm and kor period is 14 days. The outlet factor for this will be ______.
637 hectares/m3/sec	837 hectares/m3/sec
972 hectares/m3/sec	1172 hectares/m3/sec

8. 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 or kharif	rabi and kharif or sugarcane
rabi and sugarcane or kharif and sugarcane	rabi or kharif or sugarcane

9. The ratio of the quantity of water stored in the root zone of the crops to the quantity of water actually delivered in the field is known as ______.
water conveyance efficiency	water application efficiency
water use efficiency	none of the above

10. The water utilizable by plants is available in soils mainly in the form of ______.
gravity water	capillary water
hydroscopic water	chemical water

11. The amount of irrigation water required to meet the evapotranspiration needs of the crop during its full growth is called _______.
effective rainfall	consumptive use
consumptive irrigation requirement	net irrigation requirement

12. With the increase in the quantity of water supplied, the yield of most crops
increases continuously	decreases continuously
increases upto a certain limit and then becomes constant	increases upto a certain limit and then decreases

13. Hydrograph is the graphical representation of ______.
runoff and time	surface runoff and time
ground waterflow and time	rainfall and time

14. Infiltration rate is always
more than the infiltration capacity	less than the infiltration capacity
equal to or less than the infiltration capacity	equal to or more than the infiltration capacity

15. The depth of water required to bring the soil moisture content of a given soil upto its field capacity is called
hygroscopic water	equivalent moisture
soil moisture deficiency	pellicular water

16. Infiltration capacity _______.
is a constant factor	changes with time
changes with location	changes with both time and location

17. Infiltration is the _____.
movement of water through the soil	absorption of water by soil surface
both (a) and (b)	none of the above

18. If the intensity of rainfall is more than the infiltration capacity of soil, then the infiltration rate will be ______.
equal to rate of rainfall	equal to infiltration capacity
more than rate of rainfall	more than infiltration capacity

19. Cyclonic precipitation is caused by lifting of an air mass due to _____.
pressure difference	temperature difference
natural topographical barriers	all of the above

20. Which of the following is a non-recording raingauge ?
tipping bucket type raingauge	Simon's raingauge
Steven's weighing type raingauge	floating type raingauge

free Model Online Irrigation,Water Resources Engineering and Hydrology Test2

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1. For wave action in dams, the maximum height of freeboard is generally taken to be equal to _____.
0.5 hw	0.75 hw
1.25 hw	1.50 hw

2. As compared to gravity dams, earthen dams
are costlier	are less susceptible to failure
require sound rock foundations	require less skilled labour

3. The most suitable material for the central impervious core of a zoned embankment type dam is _____.
clay	coarse sand
silty clay	clay mixed with fine sand

4. Seepage through embankments in an earthen dam is controlled by ______.
drainage filters	relief wells
drain trenches	provision of downstream berms

5. Seepage through foundation in an earthen dam is controlled by providing _____.
rock toe	horizontal blanket
impervious cut off	chimney drain

6. The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are _____.
at right angle and parallel to weir crest	parallel and at right angle to weir crest
parallel to weir crest in both	at right angle to weir crest in both

7. The discharge passing over an ogee spillway is given by ______.
CLH3/2	CHL3/2
CLH5/2	CLH1/2

8. Coefficient of discharge of an ogee spillway
depends on depth of approach and upstream slope	depends on downstream apron interference and downstream submergence
remains constant	both (a) and (b)

9. Which of the following spillways is least suitable for an earthen dam ?
ogee spillway	chute spillway
side channel spillway	shaft spillway

10. In case of non-availability of space due to topography, the most suitable spillway is _____.
straight drop spillway	shaft spillway
chute spillway	ogee spillway

11. In a chute spillway, the flow is usually ______.
uniform	subcritical
critical	super critical

12. For the upstream face of an earthen dam, the most adverse condition for stability of slope is _____.
sudden drawdown	steady seepage
during construction	sloughing of slope

13. If there are two canals taking off from each flank of a river, then there will be _____.
one divide wall and one undersluice	one divide wall and two undersluices
two divide walls and one undersluice	two divide walls and two undersluices

14. Generally the weir is aligned at right angles to the direction of the main river current because
it ensures less length of the weir	it gives better discharging capacity
it is economical	all of the above

15. The main function of a divide wall is to _____.
control the silt entry in the canal	prevent river floods from entering the canal
separate the undersluices from weir proper	provide smooth flow at sufficiently low velocity

16. A divide wall is provided
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

17. As compared to crest of the normal portion of the weir, the crest of the undersluice portion of weir is kept at
lower level	higher level
same level	any of the above depending on the design

18. Silt ex-cluders are constructed on the
river bed upstream of head regulator	river bed downstream of head regulator
canal bed upstream of head regulator	canal bed downstream of head regulator

19. According to Khosla's theory, the exit gradient in the absence of a downstream cutoff is _____.
0	unity
infinity	very large

20. The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by _____.
4 RS	11 RS
7 RS	15 RS

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