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Worksheets29/12 AE Irrigation Engineering Quiz
Total questions: 10
Worksheet time: 5mins
Which of the below statements is/are correct?
* Statement I: Lining of an irrigation canal significantly reduces the Delta (Δ) for a specific crop by minimizing conveyance losses.
* Statement II: In hot and arid climates, the Duty (D) of water is generally lower compared to cooler climates for the same crop and soil type.
* Statement III: For a fixed base period, if the Delta (Δ) of a crop is doubled, the Duty (D) of water is also doubled.
I and III only
II only
II and III only
I, II, and III
A soil sample analysis reveals an Electrical Conductivity (EC) of 4500 µmhos/cm and a pH of 7.8. How would this soil be classified?
Saline soil
Sodic soil
Saline-alkali soil
Normal soil
A condition known as "physiological drought" occurs when:
The soil moisture level drops below the permanent wilting point.
High sodium concentration disperses clay particles, preventing water infiltration.
The soil solution has such a high salt concentration that the plant's roots cannot overcome the osmotic pressure to absorb water, even when the soil is moist.
The groundwater table is at its lowest level, preventing capillary rise into the root zone.
An irrigation canal is designed to serve a wheat crop with a base period of 120 days and a delta of 40 cm. If the canal has a discharge of 2 cumecs, what is the total area, in hectares, that can be irrigated?
2592 hectares
4320 hectares
5184 hectares
6480 hectares
Which of the following represents the correct hierarchical order of Duty, from the lowest value to the highest value, as water travels through an irrigation system?
Net Quantity < Outlet Factor < Lateral Quantity < Gross Quantity
Gross Quantity < Lateral Quantity < Outlet Factor < Net Quantity
Outlet Factor < Gross Quantity < Net Quantity < Lateral Quantity
Gross Quantity < Net Quantity < Outlet Factor < Lateral Quantity
The primary engineering purpose of establishing a "Crop Ratio" (Area irrigated in Rabi / Area irrigated in Kharif) in canal design is to:
Maximize the cultivation of high-value cash crops.
Ensure soil fertility is maintained through crop rotation.
Account for the higher water requirement of Kharif crops due to monsoon variability.
Balance seasonal water demands to maintain a nearly uniform discharge in the canal throughout the year.
If a crop has a consumptive use (CU) of 9 mm/day and the effective root zone depth is 60 cm, how often should irrigation be applied if the Field Capacity (FC) is 30% and the Permanent Wilting Point (PWP) is 15%?
12 days
10 days
8 days
5 days
If a farmer wants to irrigate a field of rice with a base period of 150 days and a delta of 50 cm, and the irrigation system has a discharge of 3 cumecs, what is the total area, in hectares, that can be irrigated?
7776 hectares
6480 hectares
4320 hectares
5400 hectares
A sandy soil has a field capacity of 15%, a permanent wilting point of 5%, and a dry bulk density of 1.6 g/cc. If the root zone depth is 1 m, what is the storage capacity of the soil in cm?
25 cm
10 cm
15 cm
16 cm
Which of the following statements is/are true regarding irrigation efficiency?
* Statement I: The efficiency of surface irrigation systems is generally lower than that of drip irrigation systems.
* Statement II: Irrigation efficiency can be improved by reducing evaporation losses.
* Statement III: High irrigation efficiency always leads to higher crop yields.
I and III only
I, II, and III
II only
I and II only
