Civil Engineering (CE) Exam  >  Civil Engineering (CE) Tests  >  Irrigation Engineering  >  Test: Soil Moisture Relationship - Civil Engineering (CE) MCQ

Test: Soil Moisture Relationship - Civil Engineering (CE) MCQ


Test Description

10 Questions MCQ Test Irrigation Engineering - Test: Soil Moisture Relationship

Test: Soil Moisture Relationship for Civil Engineering (CE) 2024 is part of Irrigation Engineering preparation. The Test: Soil Moisture Relationship questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Soil Moisture Relationship MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Soil Moisture Relationship below.
Solutions of Test: Soil Moisture Relationship questions in English are available as part of our Irrigation Engineering for Civil Engineering (CE) & Test: Soil Moisture Relationship solutions in Hindi for Irrigation Engineering course. Download more important topics, notes, lectures and mock test series for Civil Engineering (CE) Exam by signing up for free. Attempt Test: Soil Moisture Relationship | 10 questions in 30 minutes | Mock test for Civil Engineering (CE) preparation | Free important questions MCQ to study Irrigation Engineering for Civil Engineering (CE) Exam | Download free PDF with solutions
Test: Soil Moisture Relationship - Question 1

What is the name of water which flows under gravity?

Detailed Solution for Test: Soil Moisture Relationship - Question 1

When water flows over the land, some water is absorbed in the root zone and remaining water flows underground due to the action of gravity, hence the name gravity water.

Test: Soil Moisture Relationship - Question 2

Which zone is the most important from an irrigation point of view?

Detailed Solution for Test: Soil Moisture Relationship - Question 2

From this soil zone plants take their water requirements which are needed during their growth. As in this zone roots of the plants are present.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Soil Moisture Relationship - Question 3

By what type of forces the soil grains retain water on their surfaces?

Detailed Solution for Test: Soil Moisture Relationship - Question 3

Due to these forces like molecular attraction between adjacent soil grains and by their loose chemical bonds, i.e adsorption, the soil grains are able to retain water against the action of gravity on their surfaces.

Test: Soil Moisture Relationship - Question 4

How many days are generally taken to obtain field capacity after free gravity drainage?

Detailed Solution for Test: Soil Moisture Relationship - Question 4

Generally field capacity is defined as the water content of soil that is left after free gravity drainage for certain period of time. This period of free gravity drainage is generally taken as 2 to 5 days.

Test: Soil Moisture Relationship - Question 5

Based on loose chemical bonds, what is the name of the part of field capacity water?

Detailed Solution for Test: Soil Moisture Relationship - Question 5

The water which is attached to the soil molecules due to the influence of their loose chemical bonds is called hygroscopic water. This is a part of field capacity water.

Test: Soil Moisture Relationship - Question 6

Based on surface tension, what is the name of the part of field capacity water?

Detailed Solution for Test: Soil Moisture Relationship - Question 6

Capillary water is that part of field capacity water, which is attached to the soil molecules by surface tension against the gravitational forces.

Test: Soil Moisture Relationship - Question 7

Determine the volume of water stored in unit area if unit weight of water is 9.8 KN/m3, dry unit of soil is 17 KN/m3, field capacity (F) is 2.35 m2, and depth of root zone of the plant is 9 m.

Detailed Solution for Test: Soil Moisture Relationship - Question 7

We have field capacity (F) = (γw x volume of stored in unit area of soil / γd x d)
Therefore volume of stored water = (γd. d. F / γw)
= (17 x 9 x 2.35 / 9.8) (where, γw = unit weight of water, γd = dry unit weight of soil)
= 359.55 / 9.8
= 36.69 m3.

Test: Soil Moisture Relationship - Question 8

Determine the field capacity, when the unit weight of water is 9.8 KN/m3, and volume of water stored in unit area of soil is 28 m3, the dry unit weight of soil is 18 KN/m3, and the depth of root zone of the plant is 7 m.

Detailed Solution for Test: Soil Moisture Relationship - Question 8

We have, field capacity (F) = (weight of water retained in unit area of soil / weight of same volume of dry soil)
Weight of water retained in unit area of soil = γw x volume of water stored in unit area
= 9.8 x 28
= 274.4 KN
Weight of same volume of dry soil = γd x d (where, γw = unit weight of water, γd = dry unit weight of soil)
= 18 x 7
= 126 KN/m2
Now field capacity (F) = (274.4 / 126)
= 2.178 m2.

Test: Soil Moisture Relationship - Question 9

What is the name of actual available water to the plants?

Detailed Solution for Test: Soil Moisture Relationship - Question 9

The amount water available to the plants is the difference between field capacity water and permanent wilting point water. This amount of water is known as Available moisture or maximum storage capacity of soil.

Test: Soil Moisture Relationship - Question 10

Up to which point plants can extract water?

Detailed Solution for Test: Soil Moisture Relationship - Question 10

At permanent wilting point plants can no longer extract sufficient water for its growth and wilts up. Plants are able to extract water from the soil till this point is reached. This is the point at which permanent wilting of plants take place.

7 videos|35 docs|31 tests
Information about Test: Soil Moisture Relationship Page
In this test you can find the Exam questions for Test: Soil Moisture Relationship solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Soil Moisture Relationship, EduRev gives you an ample number of Online tests for practice

Up next

7 videos|35 docs|31 tests
Download as PDF

Up next