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ISRO ME Quiz 2: Fluid Mechanics

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Question 1

For a Newtonian fluid

Question 2

A wooden block of density 450 kg/m³ floats on the surface of a pool of stationary liquid water. Which of the following is a correct free body diagram for this situation, where F=buoyant force, N= normal force, and w = weight?

Question 3

A centrifugal pump has an efficiency of 80%. The specifications of the pump are: discharge = 70m³/hr, Head = 7m, speed = 1450 rpm and diameter = 200mm. If the speed of this pump is increased to 1750 rpm, calculate the discharge, head developed and power input required at this speed without loss in efficiency.Density of water= 998 kg/m³.

Question 4

A venturimeter of 20 mm throat diameter is used to measure the velocity of water in a horizontal pipe of 40 mm diameter. If the pressure difference between the pipe and throat sections is found to be 30 kPa then, neglecting frictional losses, the flow velocity is

Question 5

A siphon draws water from a reservoir and discharges it out at atmospheric pressure. Assuming ideal fluid and the reservoir is large, the velocity at point P in the siphon tube is:

Question 6

What will be the gauge pressure of water at point A that delivers through pump which is flowing through pipe bore of 50 mm to a tank at rate of 2.7 dm³/s. The density of water being 1000 kg/m³ with loss of pressure due to friction being 70 kPa.

Question 7

Is the static pressure more one meter below the surface of Lake or one meter below the surface of pond?

Question 8

Within a boundary layer for a steady incompressible flow, the Bernoulli equation

Question 9

The discharge velocity at pipe exit shown in figure
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Question 10

A rectangular plate of width b and a submerged depth H has its centre of gravity coinciding with level of water. For what value of b, the plate will be in a stable equilibrium? Consider H= $Description: Description: E:\Gate\SSC JE Mechanical Part 1\Made Easy Questions\07_Fluid-Mechanics_BLok_files\image031.png$ m.

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ESE & GATE ME Fluid Mechanics & Machinery

Mar 11ESE & GATE ME