Free Irrigation and Water Management MCQs with Answers

• A. 65%
• B. 70%
• C. 80%
• D. 40%

Explanation: About 70 to 71 percent of Earth’s surface is covered by water, while the remaining area is land.

• A. Catchmento protection
• B. Agriculture conservation
• C. Soil protection
• D. Saw logs

Explanation: Catchment protection manages runoff so that water is conserved for supply and irrigation while erosion and fertility loss are reduced.

• A. High water requirements
• B. High pump pressure
• C. High cost on pipes
• D. Unavailable of technology

Explanation: Close-spaced crops require closely spaced drip lines or emitters, increasing the amount of pipe and installation cost.

• A. Water frequency
• B. Water depletion
• C. Water balance
• D. Crop Water requirement

Explanation: Crop water requirement is the total water a crop needs from sowing until maturity, including water lost through evapotranspiration and…

• A. Crop water use efficiency
• B. Soil water use
• C. Soil plant water relationship
• D. Water intensity

Explanation: Crop water-use efficiency expresses the yield obtained per unit of water used by the crop.

• A. 30 acre inches
• B. 25 acre inches
• C. 18 acre inches
• D. non of these

Explanation: Cotton generally requires about 25 acre-inches of seasonal water under the standard irrigation classification used in such agronomy…

• A. An area of woody plantation
• B. An area which drains in to pond
• C. Ail area of waterlogged condition
• D. None of the above

Explanation: A catchment is the land area from which rainfall or runoff is collected and drains into a pond, reservoir, stream or other receiving body.

• A. Evaporation
• B. Transpiration
• C. Both A and B
• D. Translocation

Explanation: Evaporation removes water vapour from the soil or water surface, while transpiration releases vapour through plant stomata.

• A. 11 Barrages
• B. 19 Barrages
• C. 25 Barrages
• D. 41 Barrages

Explanation: The commonly cited Indus Basin irrigation system of Pakistan includes 19 major barrages.

• A. 59000 Km
• B. 52000 Km
• C. 58000 Km
• D. 60000 Km

Explanation: Pakistan’s extensive canal network, including main canals and distributaries, exceeds approximately 58,000 km.

• A. Transpiration
• B. Evaporation
• C. Seepage
• D. Erosion

Explanation: Canal and watercourse lining reduces the loss of irrigation water through seepage into the surrounding soil.

• A. 3000 Km
• B. 2500 Km
• C. 2900 Km
• D. 3200 Km

Explanation: The Indus River is conventionally given a length of about 2,900 km, flowing from the Tibetan Plateau through Pakistan to the Arabian Sea.

• A. Delta of water
• B. Acre inch
• C. Duty of water
• D. Frequency of water

Explanation: Delta is the total depth of irrigation water required by a crop throughout its base period.

• A. Equal
• B. More
• C. Lesser
• D. Zero

Explanation: The coefficient of discharge equals the coefficient of velocity multiplied by the coefficient of contraction.

• A. Seepage losses
• B. Percolation losses
• C. Evaporation losses
• D. Absorption losses

Explanation: Absorption losses occur when seeped irrigation water is retained by the surrounding soil and does not reach the groundwater reservoir.

• A. Reduce level
• B. Positive level
• C. Soil level
• D. Negative level

Explanation: A reduced level is the elevation of a point above or below an adopted datum, commonly mean sea level.

• A. Cohesive
• B. Pug
• C. Seal
• D. Repair

Explanation: Pugging means compacting or packing wet clay to make a relatively impermeable layer.

• A. Failure
• B. Suitability
• C. Overturning
• D. Stability

Explanation: A stability analysis checks whether an earth dam foundation can resist shear failure under the applied loads and pore-water conditions.

• A. H3/2
• B. H1/3
• C. H1/2
• D. H1/4

Explanation: For an ogee spillway, discharge follows the relation Q = C L H^(3/2), where H is the effective head over the crest.

• A. Thin layer
• B. Nappe
• C. Water sheet
• D. Water spillway

Explanation: The sheet of water flowing over a spillway crest is called a nappe. This term is used for the overflowing water sheet in weirs and…