Question

Match List-I with List-II. List-I Process of field drainage: A. The process of changing the natural topography so as to control the movement of water on to surface, B. Flat lands where there are only minor difference in field levels, C. The grade in the direction of drains can be \(0.05\) to \(0.5%\), D. Suitable for soils with poor conductivity with slopes not exceeding \(1.5%\). List-II Terminology of field drainage: I. Land forming, II. Land smoothing, III. Land grading, IV. Bedding system.

• A. A-II, B-III, C-I, D-IV
• B. A-III, B-II, C-IV, D-I
• C. A-I, B-II, C-III, D-IV
• D. A-IV, B-II, C-III, D-I

Hint:

Land forming changes natural topography, while land grading provides a planned field slope for drainage.

Answer 1

The Correct Option is C

Concept:
Field drainage operations include land forming, land smoothing, land grading and bedding systems.

Step 1: Land forming.
Changing natural topography to control water movement on the surface is called land forming. \[ A\rightarrow I \]

Step 2: Land smoothing.
Land smoothing is done on flat lands where only minor differences in field levels exist. \[ B\rightarrow II \]

Step 3: Land grading.
Land grading provides a desired grade in the direction of drains, generally \(0.05\) to \(0.5%\). \[ C\rightarrow III \]

Step 4: Bedding system.
Bedding system is suitable for soils with poor conductivity and slopes not exceeding \(1.5%\). \[ D\rightarrow IV \] Therefore: \[ A-I,\ B-II,\ C-III,\ D-IV \] \[ \therefore \text{Correct Answer is (C)} \]