Section 4: Soil and Water Conservation Engineering
Fluid Mechanics
Subtopic: Flow in open channels
Question Statement:
A discharge of 10 m³ s⁻¹ passes through a 4 m wide rectangular channel at a depth of 1.25 m. The slope of the channel is 9.08 × 10⁻³. The specific energy of flowing water is
Options:
(A) 1.25 m
(B) 1.45 m
(C) 2.25 m
(D) 3.25 m
Official Answer Key:
B
Step-by-Step Solution & Explanation
Velocity, v = Q/A = 10/(4×1.25) = 2.0 m/s. Specific energy, E = y + v²/2g = 1.25 + (2.0)²/(2×9.81) = 1.25+0.204 = 1.45 m.
Practice This in Real CBT Exam Interface
Test yourself with the official TCS-iON palette, virtual calculator, and immediate performance analytics.