GATE CE 2021: Fluid Mechanics Quiz 5 (App update required to attempt this test)

Water flows at the rate of 400 l/s. through the pipe inlet (1) diameter 35 cm and (2) outlet (2) diameter of 30 cm with 4 m level difference with point 1 above point 2. If P₁ = P₂ = 2 bar absolute, the direction of flow will be

In a water supply system, water flows in from pipes 1 and 2 and goes out from pipes 3 and 4 as shown. If all the pipes have the same diameter, which of the following must be correct.

A venturimeter in a oil (sp. Gr. = 0.8) pipe is connected to a differential manometer in which gauge liquid is mercury. For a flow of 0.16 m3/s, the manometer registered a gauge differential of 20 cm. The oil mercury manometer being unavailable, an air oil differential manometer is connected to the same venturimeter. What is the new gauge differential for a flow rate of 0.08 m3/s

A conical draft tube having inlet and outlet diameter 1 and 1.5m discharges water at outlet with velocity of 2.5 m/s. The total length of the draft tube is 6m and 1.20 m of the length of draft tube immersed in water. If the atmospheric pressure head is 10.3 m of water and loss of head due to friction in the draft tube is equal to 0.2 times velocity head at outlet of the tube, then calculate the pressure head at inlet in m.

A venturimeter, having a diameter of 7.5 cm at the throat and 1.5 cm at the enlarged end, is installed in a horizontal pipeline of 15 cm diametyer. The pipe carries an incompressible fluid at a steady rate of 30 litres per second. The difference of pressure head measured in terms of the moving fluid in between the enla4rged and the throat of the venturimeter is observed to be 2.45 m. Taking the acceleration due to gravity as 9.81 m/s², the coefficient of discharge of the venturimeter (correct up to two places of decimal) is __________

Water flows upwards in a vertical (plane) pipe line of gradually varying cross section from point 1 to point 2, which is 1.5 m above point 1, at the rate of 0.9 m³/s. At section 1 the pipe dia is 0.5 m and pressure is 800 kpa. If pressure at section 2 is 600 kpa determine the pipe diameter at that location.

(neglect the losses)