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MCQs

Total Questions : 140 | Page 2 of 14 pages
Question 11. What is the correct representation for the calculation of NIR?
  1.    Cᵤ – Rₑ
  2.    CIR + leaching losses
  3.    FIR + conveyance losses
  4.    FIR + leaching losses + conveyance losses
 Discuss Question
Answer: Option B. -> CIR + leaching losses
Answer: (b).CIR + leaching losses
Question 12. Determine the Gross irrigation requirement for an irrigation system if consumptive use of crop is 200 cm in terms of depth and the rainfall excess is 30 cm. assume water application efficiency = 50% and conveyance efficiency = 90%.
  1.    370 cm
  2.    380.79 cm
  3.    355.56 cm
  4.    377.77 cm
 Discuss Question
Answer: Option D. -> 377.77 cm
Answer: (d).377.77 cm
Question 13. The moisture holding capacity of the soil in a 100-hectare farm is 20 cm/m. The root zone depth of the crop is 1.0 m and peak rate to moisture use is 5 mm/day. The field is to be irrigated when 40% of the available moisture in the root zone is depleted. Calculate the frequency of irrigation.
  1.    16 days
  2.    18 days
  3.    20 days
  4.    25 days
 Discuss Question
Answer: Option A. -> 16 days
Answer: (a).16 days
Question 14. An outlet irrigates an area of 40 ha. The discharge required at this outlet to meet the evapotranspiration requirement of 40 mm occurring uniformly in 40 days neglecting other field losses is _________
  1.    4.52 litres / sec
  2.    2.31 litres / sec
  3.    4.01 litres / sec
  4.    1.52 litres / sec
 Discuss Question
Answer: Option A. -> 4.52 litres / sec
Answer: (a).4.52 litres / sec
Question 15. What is the correct formula for Gross irrigation requirement?
  1.    Cᵤ – Rₑ
  2.    CIR + leaching losses
  3.    NIR/Na
  4.    FIR/Nc
 Discuss Question
Answer: Option D. -> FIR/Nc
Answer: (d).FIR/Nc
Question 16. Up to which point plants can extract water?
  1.    Saturation Point
  2.    Permanent Wilting Point
  3.    Hydration Point
  4.    Dissolution Point
 Discuss Question
Answer: Option B. -> Permanent Wilting Point
Answer: (b).Permanent Wilting Point
Question 17. By what percentage of available moisture is easily extracted by plants?
  1.    80 to 90%
  2.    75 to 80%
  3.    70 to 80%
  4.    65 to 70%
 Discuss Question
Answer: Option B. -> 75 to 80%
Answer: (b).75 to 80%
Question 18. Which type of moisture is slightly less or most equal to field capacity?
  1.    Equivalent Moisture
  2.    Soil Moisture Deficiency
  3.    Available Moisture
  4.    Readily Available Moisture
 Discuss Question
Answer: Option A. -> Equivalent Moisture
Answer: (a).Equivalent Moisture
Question 19. Which type of moisture acts as a bridge between soil moisture content and field capacity?
  1.    Equivalent Moisture
  2.    Soil Moisture Deficiency
  3.    Available Moisture
  4.    Readily Available Moisture
 Discuss Question
Answer: Option B. -> Soil Moisture Deficiency
Answer: (b).Soil Moisture Deficiency
Question 20. What is the name of actual available water to the plants?
  1.    Available Moisture
  2.    Moisture
  3.    Capillary Water
  4.    Hygroscopic Water
 Discuss Question
Answer: Option A. -> Available Moisture
Answer: (a).Available Moisture

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