GATE CE 2018 Paper 2 — page 20

Complete GATE CE 2018 Paper 2 overview, original pages and practice · Timed previous-paper practice

Questions 58–60 of 65. Imported answers require review unless explicitly marked reviewed.

Paper practice 65 questionsPage 20 of 22

A rough pipe of 0.5 m diameter, 300 m length and roughness height of 0.25 mm carries water (kinematic viscosity = 0.9×10⁻⁶ m²/s) with velocity of 3 m/s. Friction factor (f) for laminar flow is given by f = 64/Re, and for turbulent flow it is given by

, where, Re = Reynolds number, r = radius of pipe, k = roughness height and g = 9.81 m/s². The head loss (in m, up to three decimal places) in the pipe due to friction is ______

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A flocculation tank contains 1800 m³ of water, which is mixed using paddles at an average velocity gradient G of 100/s. The water temperature and the corresponding dynamic viscosity are 30°C and 0.798×10⁻³ N s/m², respectively. The theoretical power required to achieve the stated value of G (in kW, up to two decimal places) is ______

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A coal containing 2% sulfur is burned completely to ash in a brick kiln at a rate of 30 kg/min. The sulfur content in the ash was found to be 6% of the initial amount of sulfur present in the coal fed to the brick kiln. The molecular weights of S, H and O are 32, 1 and 16 g/mole, respectively. The annual rate of sulfur dioxide (SO₂) emission from the kiln (in tonnes/year, up to two decimal places) is ______

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2018 · Paper 2

Question 48

Question 49

Question 50