Match the following lists :
| List-I (Size of the tunnel) | List-II (Purpose of the tunnel) |
|---|---|
| P.Circular | 1.Water and sewage mains |
| Q.Elliptical | 2.Roads and Railways |
| R.Horseshoe | 3.Water and sewage |
Select the correct answer using the code given below :
- A2 1 3
- B3 1 2Correct
- C3 2 1
- D2 3 1
Solution
Concept
Shapes of tunnel cross-sections and their uses
Step-by-step solution
1. Horseshoe sections are used for roads and railways → 2. 2. Circular sections suit water and sewage conveyance → 3. 3. Elliptical sections are used for water and sewage mains → 1.
Explanation
The shape is chosen for the flow or traffic carried and the ground pressure.
Why the other options are wrong
The other codes give roads and railways to circular or elliptical tunnels.
Shortcut
Horseshoe = roads/railways; circular/elliptical = water/sewage.
Correct answer: B) 3 1 2