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WorksheetsD36 MASTER THE DAY
Total questions: 112
Worksheet time: 2hrs 52mins
Name
Class
Date
1.
Which of the following is considered 'available water' for plants?
a)
Gravitational water
b)
Capillary water
c)
Hygroscopic water
d)
None of these
2.
Which water is held tightly around soil particles and is unavailable to plants?
a)
Gravitational water
b)
Capillary water
c)
Hygroscopic water
d)
Field capacity water
3.
What is the typical soil moisture tension at field capacity for clay?
a)
1 atm
b)
0.3 atm
c)
1/3 atm
d)
3 atm
4.
Which soil has the highest water holding capacity?
a)
Sandy soil
b)
Loamy soil
c)
Clayey soil
d)
Gravel soil
5.
In which zone does evapotranspiration primarily occur?
a)
Capillary zone
b)
Saturation zone
c)
Root zone
d)
Intermediate zone
6.
Which of the following is not a type of soil water?
a)
Hygroscopic
b)
Capillary
c)
Adhesive
d)
Gravitational
7.
What is the approximate composition of a typical loamy soil?
a)
60% sand, 30% silt, 10% clay
b)
40% sand, 40% silt, 20% clay
c)
50% sand, 25% silt, 25% clay
d)
30% sand, 50% silt, 20% clay
8.
What is the term for water held in the micropores of soil?
a)
Capillary water
b)
Gravitational water
c)
Hygroscopic water
d)
Available moisture
9.
Which soil moisture constant represents the upper limit of capillary water?
a)
Permanent wilting point
b)
Field capacity
c)
Saturation capacity
d)
Moisture equivalent
10.
The moisture equivalent of a soil is approximately equal to:
a)
Field capacity
b)
2 × Permanent wilting point
c)
Hygroscopic coefficient
d)
Saturation capacity
11.
Which force holds hygroscopic water in the soil?
a)
Cohesive force
b)
Gravitational force
c)
Adhesive force
d)
Capillary force
12.
What is the depth of root zone for wheat crop typically considered in irrigation?
a)
60 cm
b)
75 cm
c)
90 cm
d)
110 cm
13.
The zone where water is held by both air and water in the pores is called:
a)
Zone of saturation
b)
Zone of aeration
c)
Capillary zone
d)
Root zone
14.
Which of the following represents the storage capacity of the soil?
a)
Available moisture
b)
Hygroscopic water
c)
Gravitational water
d)
Field capacity
15.
The thickness of capillary zone in soil can vary from:
a)
Few mm to 10 cm
b)
Few cm to 600 m
c)
1 m to 2 m
d)
Few cm to 1 m
16.
Soil moisture stress is defined as:
a)
Osmotic pressure only
b)
Moisture content at PWP
c)
Sum of soil moisture tension and osmotic pressure
d)
Field capacity
17.
Which type of water is held at a tension of more than 31 atm?
a)
Gravitational water
b)
Capillary water
c)
Hygroscopic water
d)
Available water
18.
At what soil moisture content does a plant permanently wilt and not recover?
a)
Temporary wilting point
b)
Field capacity
c)
Available moisture
d)
Permanent wilting point
19.
Which soil is best suited for irrigation due to its balanced texture?
a)
Sandy soil
b)
Clay soil
c)
Loamy soil
d)
Gravel soil
20.
Which soil property is indicated by 'moisture equivalent'?
a)
Capillarity
b)
Water retention at saturation
c)
Water retention under centrifugal force
d)
Field capacity
21.
What is the soil moisture content at which all pores are completely filled with water?
a)
Field capacity
b)
Saturation capacity
c)
Permanent wilting point
d)
Capillary zone
22.
Which zone lies between the soil water zone and capillary water zone?
a)
Saturation zone
b)
Intermediate zone
c)
Root zone
d)
Aeration zone
23.
Which soil is formed by volcanic eruptions?
a)
Alluvial soil
b)
Colluvial soil
c)
Volcanic ash
d)
Residual soil
24.
Which soil classification is based on calcium carbonate content?
a)
Ped-al-fer
b)
Ped-o-cal
c)
Humus
d)
Aeolian
25.
What is the unit weight of soil used to calculate storage capacity?
a)
Bulk density
b)
Dry unit weight
c)
Saturated density
d)
Wet density
26.
Water held in large pores and drains freely by gravity is called:
a)
Hygroscopic water
b)
Gravitational water
c)
Capillary water
d)
Osmotic water
27.
Which instrument is used to measure soil moisture tension?
a)
Infiltrometer
b)
Tensiometer
c)
Manometer
d)
Psychrometer
28.
The soil water zone extends from ground surface to a depth of about:
a)
5 m
b)
10 m
c)
15 m
d)
20 m
29.
The osmotic pressure in soil arises due to:
a)
Capillary action
b)
Presence of salts
c)
Evaporation
d)
Soil permeability
30.
The portion of available moisture easily extracted by plants is:
a)
Gravitational water
b)
Readily available moisture
c)
Hygroscopic water
d)
Temporary moisture
31.
The zone in which water is held by capillary action above the water table is:
a)
Zone of aeration
b)
Zone of saturation
c)
Capillary zone
d)
Intermediate zone
32.
Which term refers to the water required to raise soil to field capacity?
a)
Soil moisture stress
b)
Moisture equivalent
c)
Soil moisture deficiency
d)
Saturation capacity
33.
Which zone lies just below the water table?
a)
Zone of saturation
b)
Zone of aeration
c)
Capillary zone
d)
Intermediate zone
34.
Field capacity is higher for which type of soil?
a)
Clay
b)
Silt
c)
Sand
d)
Gravel
35.
Available moisture is the difference between:
a)
Saturation and Field capacity
b)
Field capacity and PWP
c)
PWP and hygroscopic water
d)
Gravitational and capillary water
36.
Water table is the top of which zone?
a)
Aeration zone
b)
Capillary zone
c)
Saturation zone
d)
Intermediate zone
37.
Which zone contains pores partially filled with air and water?
a)
Saturation zone
b)
Capillary zone
c)
Zone of aeration
d)
Root zone
38.
The capillary rise depends on:
a)
Soil color
b)
Soil density
c)
Pore size
d)
Root depth
39.
Which method is used to evaluate the salinity level in irrigation water?
a)
Tensiometer method
b)
Electrical conductivity method
c)
Infiltration method
d)
Lysimeter method
40.
The quality of irrigation water is affected by the presence of:
a)
Air
b)
Sodium ions
c)
Hydrogen ions
d)
Nitrogen gas
41.
What is the unit for expressing electrical conductivity of irrigation water?
a)
Ohm-cm
b)
Volt/m
c)
Micro mhos/cm
d)
Amps/m
42.
Which classification of water is considered suitable for all types of crops?
a)
C1
b)
C3
c)
C4
d)
C2
43.
Sodium Absorption Ratio (SAR) represents the proportion of:
a)
Chlorides
b)
Sodium ions
c)
Carbonates
d)
Silicates
44.
Which type of soil is classified as alkali soil?
a)
pH < 8.5 and EC > 4000
b)
pH > 8.5 and EC < 4000
c)
pH < 8.5 and EC < 4000
d)
pH > 7 and EC > 5000
45.
What is the typical delta for rice crop?
a)
37.5 cm
b)
45 cm
c)
120 cm
d)
90 cm
46.
The time between sowing and last irrigation of a crop is called:
a)
Crop period
b)
Base period
c)
Delta
d)
Duty
47.
Duty of water is expressed as:
a)
Liters per day
b)
Cumec per hectare
c)
Hectares per cumec
d)
Meters per hectare
48.
Which crop has the highest delta among the following?
a)
Wheat
b)
Cotton
c)
Rice
d)
Tobacco
49.
Kor watering is the first watering done when the plant is:
a)
Fully mature
b)
Few cm high
c)
Germinating
d)
Drying
50.
The depth of water applied during kor watering for wheat is:
a)
13.5 cm
b)
16.5 cm
c)
19 cm
d)
10 cm
51.
Consumptive use of water includes:
a)
Runoff losses
b)
Evapotranspiration
c)
Conveyance losses
d)
Deep percolation
52.
What is the ratio used to express crop ratio?
a)
Base period / Delta
b)
Kharif area / Rabi area
c)
Rabi area / Kharif area
d)
Crop area / Water requirement
53.
Overlap allowance is usually taken as:
a)
2%
b)
3%
c)
5%
d)
10%
54.
The base period of sugarcane is generally:
a)
90 days
b)
180 days
c)
120 days
d)
365 days
55.
Kharif crops are sown during which month?
a)
October
b)
June
c)
April
d)
January
56.
Leaching is used to remove:
a)
Salts from soil
b)
Excess water
c)
Nutrients
d)
Weeds
57.
The salinity level of saline soil is:
a)
pH > 8.5 and EC < 4000
b)
pH < 8.5 and EC > 4000
c)
pH > 7.5 and EC < 3000
d)
pH > 9 and EC > 3000
58.
Which crop requires 2 to 3 times more water than rabi crops?
a)
Wheat
b)
Maize
c)
Kharif crops
d)
Zaid crops
59.
Which of the following is a hot weather crop?
a)
Pumpkin
b)
Wheat
c)
Mustard
d)
Tobacco
60.
The term 'perennial crop' refers to:
a)
Crops that grow in monsoon
b)
Crops needing water occasionally
c)
Crops requiring irrigation all year
d)
Crops that need zero irrigation
61.
Which season comes between rabi and kharif in India?
a)
Summer
b)
Winter
c)
Monsoon
d)
Zaid
62.
The purpose of kor watering is to:
a)
Aid germination
b)
Cool the soil
c)
Support young plant
d)
Control weeds
63.
Which of the following is an indicator of water requirement of a crop?
a)
Humidity
b)
Duty
c)
Delta
d)
Slope
64.
The crop period is:
a)
Shorter than base period
b)
Always equal to base period
c)
Longer than base period
d)
Unrelated to base period
65.
Which of these crops is typically grown in the rabi season?
a)
Maize
b)
Jowar
c)
Barley
d)
Turmeric
66.
Which of the following is a plantation crop?
a)
Onion
b)
Rice
c)
Coffee
d)
Maize
67.
Which crop season's crops are known as monsoon crops?
a)
Rabi
b)
Zaid
c)
Perennial
d)
Kharif
68.
Sugarcane is an example of which type of crop?
a)
Zaid
b)
Rabi
c)
Perennial
d)
Dry crop
69.
Which crops are cultivated for commercial value and not consumed directly?
a)
Food crops
b)
Dry crops
c)
Cash crops
d)
Zaid crops
70.
Crop rotation improves:
a)
Pest control
b)
Weed control
c)
Soil fertility
d)
Water efficiency
71.
How is water requirement of high salt resistant crops managed after leaching?
a)
With drip irrigation
b)
Using rainfed methods
c)
By immediate irrigation
d)
By growing in unwashed soil
72.
Which crop requires a delta of 90 cm?
a)
Tobacco
b)
Wheat
c)
Sugarcane
d)
Cotton
73.
What is meant by 'duty' in irrigation?
a)
Depth of water applied
b)
Number of times irrigation is needed
c)
Area irrigated per unit water
d)
Crop duration
74.
Fertigation is:
a)
Fertilizing before sowing
b)
Mixing fertilizer with water
c)
Drilling fertilizer deep into soil
d)
Flooding fields with manure
75.
Which method of irrigation gives highest water application efficiency?
a)
Flooding
b)
Sprinkler
c)
Drip
d)
Contour farming
76.
In leaching, what replaces sodium in sodic soils?
a)
Magnesium
b)
Silica
c)
Calcium
d)
Iron
77.
Which season crops generally require 2 to 3 times more water than others?
a)
Rabi
b)
Zaid
c)
Kharif
d)
Perennial
78.
Crop period is always _____ base period.
a)
less than
b)
equal to
c)
greater than
d)
not related to
79.
Statement I: Kharif crops are harvested in autumn.
Statement II: Kharif crops are sown in April.
Choose the correct option.
a)
Both statements are correct
b)
Only Statement I is correct
c)
Only Statement II is correct
d)
Both statements are incorrect
80.
Match the crop with its typical season:
A. Wheat
B. Maize
C. Pumpkin
D. Cotton
a)
A-Rabi, B-Kharif, C-Zaid, D-Kharif
b)
A-Kharif, B-Rabi, C-Kharif, D-Zaid
c)
A-Zaid, B-Rabi, C-Rabi, D-Kharif
d)
A-Kharif, B-Kharif, C-Zaid, D-Rabi
81.
Duty of water is expressed in:
a)
litres/second
b)
hectares/cumec
c)
hectares/meter
d)
cusecs/hectare
82.
Calculate the duty (ha/cumec) if base period is 120 days and delta is 80 cm.
a)
2592
b)
1296
c)
648
d)
864
83.
Assertion: Rainfed crops do not require artificial irrigation.
Reason: These crops mature with rainfall only.
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
c)
A is true, R is false
d)
A is false, R is true
84.
A field receives 1 cumec discharge for 1 day. What is the volume of water received in hectare-meters?
a)
8.64
b)
1
c)
10
d)
100
85.
Which of the following correctly defines base period?
a)
Total crop duration
b)
Time from sowing to maturity
c)
Time from first to last irrigation
d)
Water application time
86.
Which of the following expresses the delta (∆) in irrigation planning?
a)
Depth of rainfall
b)
Depth of irrigation water
c)
Volume of water
d)
Crop water use
87.
Statement I: Delta depends on duty and base period.
Statement II: Delta and duty are directly proportional.
a)
Both statements are true
b)
Statement I is true, Statement II is false
c)
Statement I is false, Statement II is true
d)
Both statements are false
88.
If the base period is doubled and delta remains constant, the duty will:
a)
Remain same
b)
Double
c)
Halve
d)
Be zero
89.
Duty and delta are related by the equation:
a)
Duty = ∆ / 864
b)
∆ = Duty × Base period
c)
∆ = 864 × B / D
d)
D = ∆ × B × 864
90.
Which crop has the shortest base period?
a)
Wheat
b)
Cotton
c)
Rice
d)
Tobacco
91.
The term 'Kor watering' refers to:
a)
Watering before harvesting
b)
Heavy watering at early stages
c)
Light irrigation at mid stage
d)
Supplementary irrigation during rain
92.
The kor water depth for sugarcane is typically:
a)
13.5 cm
b)
16.5 cm
c)
19.0 cm
d)
10.0 cm
93.
Which is not a factor affecting water requirement of crops?
a)
Soil type
b)
Crop type
c)
Rainfall
d)
Road width
94.
The term 'consumptive use' includes:
a)
Runoff losses
b)
Only transpiration
c)
Evaporation + Transpiration
d)
Seepage losses
95.
Which of the following instruments is used to determine evapotranspiration?
a)
Tensiometer
b)
Rain gauge
c)
Lysimeter
d)
Anemometer
96.
Water required to meet evapotranspiration is called:
a)
Effective rainfall
b)
Irrigation requirement
c)
Consumptive use
d)
Net irrigation requirement
97.
Statement: Sugarcane is a perennial crop. Reason: It requires irrigation throughout the year.
a)
Both statement and reason are true, and reason explains statement
b)
Both are true but unrelated
c)
Statement is true, reason is false
d)
Statement is false, reason is true
98.
What is the crop ratio if rabi area is 60,000 ha and kharif area is 40,000 ha?
a)
1.5
b)
0.67
c)
2.0
d)
1.25
99.
The base period for cotton is generally:
a)
120 days
b)
160 days
c)
180 days
d)
365 days
100.
Which term represents water applied in excess of consumptive use?
a)
Effective rainfall
b)
Leaching requirement
c)
Percolation
d)
Net irrigation
101.
What does the term 'duty' depend on?
a)
Delta and crop period
b)
Base period and delta
c)
Soil fertility
d)
Sowing method
102.
Which crop is NOT a cash crop?
a)
Cotton
b)
Sugarcane
c)
Barley
d)
Coffee
103.
Which factor directly influences the evapotranspiration rate in crops?
a)
Soil structure
b)
Wind speed
c)
Fertilizer type
d)
Seeding rate
104.
Delta is highest for which type of crop?
a)
Cereal crops
b)
Cash crops
c)
Fodder crops
d)
Perennial crops
105.
Duty of water is inversely proportional to:
a)
Base period
b)
Effective rainfall
c)
Delta
d)
Water table
106.
Which crop requires kor watering of 13.5 cm?
a)
Wheat
b)
Rice
c)
Cotton
d)
Barley
107.
If the duty is 1728 ha/cumec and base period is 120 days, calculate the delta.
a)
60 cm
b)
80 cm
c)
40 cm
d)
30 cm
108.
Which is the most water-efficient irrigation method?
a)
Furrow
b)
Sprinkler
c)
Drip
d)
Basin
109.
The net irrigation requirement is defined as:
a)
Water lost to runoff
b)
Water applied minus effective rainfall
c)
Water supplied by canal
d)
Water stored in reservoir
110.
For an irrigation duty of 1296 ha/cumec and base period 180 days, the delta is:
a)
120 cm
b)
100 cm
c)
60 cm
d)
180 cm
111.
Which of the following does NOT affect consumptive use?
a)
Humidity
b)
Wind speed
c)
Soil moisture
d)
Crop color
112.
Water use efficiency (WUE) is defined as:
a)
Yield per area
b)
Water applied per yield
c)
Yield per unit water used
d)
Water lost in field
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