Test: Irrigation Techniques & Water Requirement of Crops - 1


10 Questions MCQ Test Topicwise Question Bank for Civil Engineering | Test: Irrigation Techniques & Water Requirement of Crops - 1


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Attempt Test: Irrigation Techniques & Water Requirement of Crops - 1 | 10 questions in 30 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Topicwise Question Bank for Civil Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
QUESTION: 1

With the increase in supplied irrigation water, the yield of crops

Solution:

Initially, when supply increases plants will get adequate water depth for their growth but ager certain limit water will cause water logging thus, degrading the growth of plants.

QUESTION: 2

The duty of irrigation water for a given crop is maximum

Solution:

Duty of irrigation canal increases as one moves from main canal to the field because losses at main canal will be higher than on field leading to lesser area irrigated for same volume of water.

QUESTION: 3

Consumptive use of water for a crop represents

Solution:

Crop consumptive water use is the amount of water transpired during plant growth plus what evaporates from the soil surface and foliage in the crop area. In short, evapotranspiration needs of cropped area plus the minor quantity required in plant metabolism. 

QUESTION: 4

Permanent wilting point moisture content for a crop represents the

Solution:

Permanent wilting point is the point beyond which the roots of plant cannot access water. It is the hygroscopic water. 
Useful soil moisture for plant growth is capillary water.

QUESTION: 5

The efficiency of water application does not depend upon

Solution:
QUESTION: 6

The efficiency of water conveyance does not depend upon

Solution:
QUESTION: 7

The table given below the details for a particular crop, with a crop factor 0.5. The consumptive water requirement of the crop will be,

Solution:

Correct Answer :- b

Explanation : Cu = kΣf 

= kΣ p/40(1.8t + 32)

= 0.5[8/40(1.8*20+32) + 8/40(1.8*20+32)]

= 13.6 cm

QUESTION: 8

Commonly adopted moisture tension, in atmosphere, of a soil at permanent wilting point is

Solution:

QUESTION: 9

At field capacity, water is held in most of the soils at a tension of

Solution:

QUESTION: 10

Irrigation frequency is a function of

Solution:
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