Irrigation Layout and Design MCQs

25 Score: 0 Attempted: 0/25 Subscribe

1. : The primary objective of irrigation layout design is:
(A) To supply water efficiently to crops with minimum loss
(B) To increase labor only
(C) To reduce crop yield
(D) To randomize water application

2. : In canal design, the term “discharge” refers to:
(A) Volume of water flowing per unit time
(B) Soil moisture content
(C) Crop evapotranspiration
(D) Fertilizer dose

3. : The critical velocity in irrigation channels is designed to:
(A) Prevent sedimentation and erosion
(B) Increase waterlogging
(C) Reduce crop yield
(D) Reduce soil fertility

4. : The main factors considered in irrigation layout planning include:
(A) Topography, soil type, crop water requirements, and water source
(B) Seed variety only
(C) Tractor size
(D) Labor availability only

5. : The term “base period” in irrigation design means:
(A) Number of days a crop needs water from sowing to harvesting
(B) Crop rotation schedule
(C) Tractor operation period
(D) Fertilizer application period

6. : In sprinkler irrigation, spacing of sprinklers depends on:
(A) Throw radius and overlap for uniform distribution
(B) Tractor size
(C) Soil pH only
(D) Fertilizer dose

7. : In drip irrigation, the main design parameter is:
(A) Emitter discharge and spacing
(B) Pump horsepower only
(C) Soil texture only
(D) Crop variety only

8. : The field efficiency of an irrigation system is defined as:
(A) Ratio of water beneficially used by crops to water applied
(B) Pump discharge × Head
(C) Area × Rainfall
(D) Crop yield ÷ Fertilizer applied

9. : In surface irrigation, furrow length is limited by:
(A) Soil infiltration rate and slope
(B) Crop spacing only
(C) Pump size
(D) Fertilizer type

10. : The term “duty” of water in irrigation means:
(A) Area irrigated per unit discharge of water
(B) Tractor fuel consumption
(C) Crop weight
(D) Soil compaction

11. : Canal cross-section is usually designed as:
(A) Trapezoidal or rectangular for efficient flow
(B) Circular only
(C) Random shape
(D) Square only

12. : In irrigation layout, the factor of safety is considered to:
(A) Account for variation in water availability
(B) Increase soil moisture
(C) Reduce crop yield
(D) Increase labor cost

13. : The gross command area refers to:
(A) Total area served by the irrigation system
(B) Area irrigated per day
(C) Pump capacity
(D) Crop spacing

14. : In sprinkler irrigation, the optimum spacing is about:
(A) 0.5 to 0.7 times the throw radius
(B) Equal to the tractor width
(C) Soil depth
(D) Crop height

15. : In canal design, the Manning’s roughness coefficient “n” represents:
(A) Channel surface roughness
(B) Crop water requirement
(C) Pump efficiency
(D) Soil type only

16. : The hydraulic gradient in irrigation channels is used to:
(A) Maintain required velocity for flow
(B) Control fertilizer application
(C) Schedule labor
(D) Determine soil type

17. : Check basins are used in:
(A) Basin irrigation for level fields
(B) Drip irrigation only
(C) Furrow irrigation only
(D) Sprinkler irrigation only

18. : The purpose of a tailwater return system is to:
(A) Reuse water from the field
(B) Increase soil salinity
(C) Increase evaporation
(D) Reduce labor

19. : In drip irrigation, pressure-compensating emitters are used to:
(A) Maintain uniform flow under varying pressures
(B) Increase fertilizer dose
(C) Reduce crop yield
(D) Increase labor requirement

20. : The term “base flow” in canal irrigation refers to:
(A) Minimum discharge required to meet crop needs
(B) Pumping hours only
(C) Soil moisture deficit
(D) Fertilizer rate

21. : In field layout, contour farming is practiced to:
(A) Reduce soil erosion on slopes
(B) Increase pump energy
(C) Increase labor
(D) Reduce crop spacing

22. : In sprinkler irrigation, uniformity coefficient indicates:
(A) Evenness of water application over the field
(B) Pump efficiency
(C) Crop weight
(D) Soil compaction

23. : The size of the main canal is determined by:
(A) Total water requirement of the command area
(B) Tractor width
(C) Fertilizer dose
(D) Crop variety

24. : Furrow irrigation is mostly suitable for:
(A) Row crops like maize, cotton, and sugarcane
(B) Paddy fields only
(C) Orchards only
(D) Pastures only

25. : The main advantage of drip irrigation layout is:
(A) High water use efficiency and targeted delivery
(B) Reduced yield
(C) Increased labor cost
(D) Increased soil erosion