GATE 2023 CE (CE2) – Question 20
Identify the cross-drainage work in the figure.
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Correct answer: (A) Super passage
Explanation
Identify the work from how the two waterways cross, as described in the figure: the natural drain is carried in a trough **above the canal**, and the canal flows freely below it (the canal full supply level is below the trough bottom).
- **Aqueduct:** the *canal* is carried over the drain.
- **Siphon aqueduct:** the canal is also carried over the drain, but the drain bed is below the canal's full supply level, so the water in the canal flows under pressure through barrels.
- **Super passage:** the *drain* is carried over the canal, and the canal flows freely beneath. ✓
- **Level crossing:** the canal and the drain meet at the same level and are connected by regulators.
Answer **Super passage** (A).