GATE PI concept:laminar PYQs & Answers

Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–3 of 3. Imported answers require independent review unless marked reviewed.

Topic practice 3 questionsPage 1 of 1

Water flows through a smooth circular pipe of diameter 10 cm and length 10 m. The pressure drop across the length of the pipe is 0.2 Pa. Kinematic viscosity and density of water are 1×10⁻⁶ m²/s and 1000 kg/m³, respectively. Assuming laminar and fully developed flow throughout the pipe, the velocity of water (in m/s) at the center of the pipe is __________. (Rounded off to one decimal place)

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An irrigation pump is used to draw water from a pond. One end of a 5.05 cm diameter hose pipe is connected to the outlet of the pump at 1.02 m below the surface level, and just after the pump, the static gauge pressure and flow rate of the water are 50 kPa and 8 kg/s, respectively. The pumped water is discharged at the ground level through a nozzle. Assume that the flow through the hose pipe and nozzle is steady and laminar, and friction and viscous losses are negligible. The density of water is 1000 kg/m

and the acceleration due to gravity is 9.81 m/s

. If the static pressure at the nozzle exit of the nozzle jet reduces to atmospheric pressure then the nozzle diameter (in cm) of the nozzle is __________. (Rounded off to 2 decimal places)

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Water (kinematic viscosity

) is flowing through a circular horizontal pipe of diameter 8 mm. If the flow is laminar and fully developed with a maximum axial velocity of 0.5 m/s, the Reynolds number is____________. [round off to nearest integer]

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GATE PI concept:laminar PYQs

How to practice concept:laminar

Question 64

Question 48

Question 27