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GATE 2021: Fluid Mechanics Rapid Quiz 2 (App update required to attempt this test)

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Question 1

It was observed that the difference of heads between the two ends of a pipe 300m long and 0.25 m diameter is 1.8 m. Taking Darcy’s friction factor as 0.01 and neglecting minor losses, calculate the discharge flowing through pipe.

Question 2

A circulator jet of water emanating from a nozzle strikes a stationary velocity plate normally. The force exerted is measured as 635 N. If the discharge from the nozzle is measured as 42.4 Liters/sec the diameter of the nozzle at the exit is _________ cm.

Question 3

For the flow through nozzle match the correct parameters
PASSAGE Effect on Mach number

Question 4

Air (ρ= 1.2 kg/m3 and kinematic viscosity. v = 2 × 10-5m2/s) with a velocity of 2 m/s flows over the top surface of a flat plate of length 2.5 m. If the average value of friction coefficient is , the total drag force (in N) per unit width of the plate is_______

Question 5

The water flows through a 50 mm diameter pipe with a velocity of 1 m/s at 20. The viscosity of water at 20 is 0.001 kg/ms. The length of the pipe (in m) required for the establishment of fully developed flow is

Question 6

Consider steady, incompressible and irrotational flow through a reducer in a horizontal pipe where the diameter is reduced from 20 cm to 10 cm. The pressure in the 20 cm pipe just upstream of the reducer is 150 kPa. The fluid has a vapour pressure of 50 kPa and a specific weight of 5 kN/m3. Neglecting frictional effects, the maximum discharge (in m3/s) that can pass through the reducer without causing cavitation is
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