Question

Given below are two statements
Statement I: Inverted siphon is not economical when a channel has to cross a wide depression or where road surface lies close to the field surface.
Statement II: Culverts are commonly used at channel crossing when the road fill is sufficiently high and channel bed lies on the field surface on either side.
In the light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are true
• B. Both Statement I and Statement II are false
• C. Statement I is true but Statement II is false
• D. Statement I is false but Statement II is true

Hint:

Cross drainage structures:
- Culverts: Canal passes through pipe under road.
- Siphons: Canal passes under drainage.
- Inverted siphons: Canal passes under depression.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
This question tests knowledge of cross drainage structures and their applications.

Step 2: Detailed Explanation:
Statement I:
Inverted siphon (also called depressed conduit) is used when a canal crosses a drainage channel at a lower level.
It becomes uneconomical when crossing a wide depression (requires long pipes and extensive excavation).
Also, if road surface is close to the field surface, construction is difficult and expensive.
This statement is true.
Statement II:
Culverts are used when a canal crosses a road or drainage at the same level.
They are suitable when road fill is sufficiently high (allowing passage of canal).
The channel bed lies on the field surface on either side.
This statement is true.

Step 3: Final Answer:
Thus, both statements are true.
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