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Civil Engineering (CE) Exam  >  Civil Engineering (CE) Test  >  Irrigation Engineering  >  Test: Duty and Delta of a Crop - Civil Engineering (CE) MCQ

Duty and Delta of a Crop - Free MCQ Practice Test with solutions, GATE


MCQ Practice Test & Solutions: Test: Duty and Delta of a Crop (10 Questions)

You can prepare effectively for Civil Engineering (CE) Irrigation Engineering with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Duty and Delta of a Crop". These 10 questions have been designed by the experts with the latest curriculum of Civil Engineering (CE) 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 30 minutes
  • - Number of Questions: 10

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Test: Duty and Delta of a Crop - Question 1
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What is the time interval between two consecutive watering called?

Detailed Solution: Question 1

Every type of crop requires different amount of water for its complete growth in certain fixed intervals of time. The time interval between two consecutive intervals is called a rotation period.

Test: Duty and Delta of a Crop - Question 2
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Find the delta for a crop if the duty for a base period of 110 days is 1400 hectares/cumec.

Detailed Solution: Question 2

Duty: It is the number of hectares of land irrigated for full growth of a given crop by a supply of 1 cumec of water continuously during the entire base period of that crop.
Delta: The total water depth required by a crop to attain its full maturity in its base period.
Base Period: The time period that elapsed for the instant of the showing of crop to the instant of its harvesting is called base period or crop period.
The relation between Duty (D), Delta (Δ) and Base period (B) is given as:

Calculation:
Given data,
B = 110 days
D = 1400 hectares/cumec
Hence, the delta for a crop

Δ = 0.678 m = 68 cm

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Test: Duty and Delta of a Crop - Question 3
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The delta of a crop is 0.864 m and the base period is 130 days. What is the duty of the crop (in hectares/cumec)?

Detailed Solution: Question 3

Duty: It is the number of hectares of land irrigated for full growth of a given crop by a supply of 1 cumec of water continuously during the entire base period of that crop.
Delta: The total water depth required by a crop to attain its full maturity in its base period.
Base Period: The time period that elapsed for the instant of the showing of crop to the instant of its harvesting is called base period or crop period.
The relation between Duty in hectares/cumec (D), Delta in meter (Δ) and Base period in days (B) is given as:

Calculation:
Given data,
B = 130 days
Δ = 0.864 m
Hence, the delta for a crop

D = 1300 hectares/cumec

Test: Duty and Delta of a Crop - Question 4
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Find the delta for a crop when its duty is 1728 hectares/cumec on the field, the base period for the crop is 240 days.

Detailed Solution: Question 4

The relation between Duty (D), Delta (Δ), and Base period (B) is given as:

Calculation:
Base period (B) = 240 days
Duty (D) = 1728 hec/cumec

Δ = 1.2 m = 120 cm

Test: Duty and Delta of a Crop - Question 5
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What is the delta for a crop when its duty is 864 hectares/cumec on the field and the base period of the same crop is 140 days?

Detailed Solution: Question 5

Duty: It is the number of hectares of land irrigated for full growth of a given crop by a supply of 1 cumec of water continuously during the entire base period of that crop.
Delta: The total water depth required by a crop to attain its full maturity in its base period.
Base Period: The time period that elapsed for the instant of the showing of crop to the instant of its harvesting is called base period or crop period.
The relation between Duty (D), Delta (Δ) and Base period (B) is given as:

Δ = 1.4 m = 140 cm

Test: Duty and Delta of a Crop - Question 6
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What is the delta for a crop when its duty is 864 hectares/cumec on the field and the base period of this crop is 120 days?

Detailed Solution: Question 6

Relation between Delta (Δ), Duty (D), and Base period (B) is given by:

Where
Δ is in cm, D is in hectares per cumec, and B is in days
Calculation:
Given data,
D = 864 hectares/cumecs
B = 120 days
The delta for a crop 

Test: Duty and Delta of a Crop - Question 7
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What is total depth of water, for complete growth of crop called?

Detailed Solution: Question 7

The total quantity of water required by the crop for its complete growth can be expressed in terms of depth of water standing on the field. This total depth expressed in cm is called delta.

Test: Duty and Delta of a Crop - Question 8
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What is the name of duty called as in direct irrigation?

Detailed Solution: Question 8

When direct irrigation is used, then the units of duty, always expressed in hectares/cumec. Then duty is called flow duty.

Test: Duty and Delta of a Crop - Question 9
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Which type of units is used to define high and low duty?

Detailed Solution: Question 9

According to the number of hectares/cumec, if the irrigated area is large or small then it is called high or low duty respectively.

Test: Duty and Delta of a Crop - Question 10
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In what type of area crop is not sown for a particular season?

Detailed Solution: Question 10

This type of area is not kept under cultivation because, to restore the fertility of the soil, to provide pasture land for animals, to prevent water logging in the land.

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About this Civil Engineering (CE) Practice Test

This test contains 10 MCQs on Duty and Delta of a Crop with detailed solutions for each question. It is part of the Irrigation Engineering course on EduRev, designed to align with the current Civil Engineering (CE) syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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