Hydrology Newsletter

Click here to download Dr. Mrinmoy Majumder’s Hydrology for Beginners: A Video Book is an ambitious attempt to make introductory hydrology more accessible through a combination of concise reading materials and video-based instruction. Instead of presenting hydrology solely through equations and descriptive text, the book adopts a multimedia format intended to help learners observe calculations, diagrams and problem-solving procedures in a guided manner. This makes the work particularly relevant to undergraduate students, early-stage researchers and practising engineers who need a structured introduction or rapid refresher. Content and organisation The book addresses several foundational areas of engineering hydrology. The associated learning series includes methods for estimating mean precipitation, testing rainfall-data consistency, correcting and estimating missing rainfall records, analysing hydrological risk, understanding floods, interpreting hydrographs and performing reservoir ...

Click here to access the full post : https://hydrogeek.substack.com/p/interviewgate-questions-on-fluid?r=c8bxy Fluid Properties and Hydrostatics Q1. A Newtonian fluid has a dynamic viscosity of 0.5 Pa·s and a shear rate of 20 s⁻¹ at a point. What is the shear stress at that point? (a) 5 Pa (b) 10 Pa (c) 15 Pa (d) 25 Pa Answer: (b) 10 Pa — Shear stress = μ × (du/dy) = 0.5 × 20 = 10 Pa, following Newton’s law of viscosity. Q2. The pressure at a depth of 5 m below the free surface of water (density 1000 kg/m³) is approximately: (a) 5 kPa (b) 49 kPa (c) 98 kPa (d) 500 kPa Answer: (b) 49 kPa — Using , Pa ≈ 49 kPa. Q3. A cube of density 800 kg/m³ floats in water of density 1000 kg/m³. What fraction of the cube’s volume is submerged? (a) 0.6 (b) 0.7 (c) 0.8 (d) 0.9 Answer: (c) 0.8 — By Archimedes’ principle, submerged fraction = ρ_body/ρ_fluid = 800/1000 = 0.8. Q4. The excess pressure inside a spherical air bubble of radius r immersed in a liquid with surface tension σ is given by: (a) σ/r...