Question

Match the LIST-I with LIST-II

LIST-I	LIST-II
A. Gradually varied flow with increasing discharge B. Turbulent flow C. Drop structures D. Gradually varied flow with decreasing discharge	I. Hilly river on steep slope II. Irrigation canal III. Pipe inlet IV. Drainage ditch

Choose the correct answer from the options given below:

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

Hint:

Important hydraulic associations: \[ \boxed{ \text{Turbulent flow} \rightarrow \text{Irrigation canal} } \] \[ \boxed{ \text{Drop structures} \rightarrow \text{Energy dissipation} } \] \[ \boxed{ \text{GVF increasing discharge} \rightarrow \text{Natural streams} } \]

Answer 1

The Correct Option is A

Concept: This question is based on:
• Open channel hydraulics
• Flow classifications
• Hydraulic structures Different hydraulic conditions are associated with specific field situations.

Step 1: Matching gradually varied flow with increasing discharge. Gradually varied flow with increasing discharge generally occurs in:
• Hilly rivers
• Steep natural streams This happens because tributaries continuously add water. Thus: \[ \boxed{ A \rightarrow I } \]

Step 2: Matching turbulent flow. Turbulent flow commonly occurs in:
• Irrigation canals
• Open channels with larger Reynolds number Thus: \[ \boxed{ B \rightarrow II } \]

Step 3: Matching drop structures. Drop structures are commonly associated with:
• Pipe inlet systems
• Hydraulic energy dissipation Hence: \[ \boxed{ C \rightarrow III } \]

Step 4: Matching gradually varied flow with decreasing discharge. Gradually varied flow with decreasing discharge occurs in:
• Drainage ditches
• Channels losing water by infiltration or diversion Thus: \[ \boxed{ D \rightarrow IV } \]

Step 5: Writing the final matching. Correct matching becomes: \[ \boxed{ A-I,\; B-II,\; C-III,\; D-IV } \]

Step 6: Comparing with options. Option (A): \[ A-I,\; B-II,\; C-III,\; D-IV \] This exactly matches the correct arrangement. Hence: \[ \boxed{ \text{Option (A) is correct} } \] Option (B): Incorrect matching. Hence: \[ \boxed{ \text{Option (B) is incorrect} } \] Option (C): Incorrect arrangement. Hence: \[ \boxed{ \text{Option (C) is incorrect} } \] Option (D): Incorrect association. Hence: \[ \boxed{ \text{Option (D) is incorrect} } \] Final Conclusion: Correct matching is: \[ \boxed{ A-I,\; B-II,\; C-III,\; D-IV } \] Hence the correct answer is: \[ \boxed{ (A) } \]