GATE CE 2017 Set 1 — Question 30

MCQ+1 / -0.33EasyCanal Regulation WorksCanals & Hydraulic StructuresWater Resources Engineering

Water Resources Engineering → Canals & Hydraulic Structures → Canal Regulation Works

Last updated 5 September 2026

Question

Group I contains three broad classes of irrigation supply canal outlets. Group II presents hydraulic performance attributes. Group I Group II P. Non-modular outlet 1. Outlet discharge depends on the water levels in both the supply canal as well as the receiving water course Q. Semi-modular outlet 2. Outlet discharge is fixed and is independent of the water levels in both the supply canal as well as the receiving water course R. Modular outlet 3. Outlet discharge depends only on the water level in the supply canal The correct match of the items in Group I with the items in Group II is

Group I	Group II
P. Non-modular outlet	1. Outlet discharge depends on the water levels in both the supply canal as well as the receiving water course
Q. Semi-modular outlet	2. Outlet discharge is fixed and is independent of the water levels in both the supply canal as well as the receiving water course
R. Modular outlet	3. Outlet discharge depends only on the water level in the supply canal

Correct answer (D) P - 1; Q - 3; R - 2 Solution Non-modular outlet: The discharge depends on the difference in water levels between the parent canal and the field channel (receiving water course). (P-1) Semi-modular outlet: The discharge depends only on the water level in the parent canal, provided a minimum working head is maintained. (Q-3) Modular outlet: The discharge is independent of the water levels in both the parent canal and the field channel. (R-2) Therefore, the correct match is P-1, Q-3, R-2, which corresponds to option (D). Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (D) P - 1; Q - 3; R - 2 Solution Non-modular outlet: The discharge depends on the difference in water levels between the parent canal and the field channel (receiving water course). (P-1) Semi-modular outlet: The discharge depends only on the water level in the parent canal, provided a minimum working head is maintained. (Q-3) Modular outlet: The discharge is independent of the water levels in both the parent canal and the field channel. (R-2) Therefore, the correct match is P-1, Q-3, R-2, which corresponds to option (D).

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