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BARC 2020: Fluid Mechanics Nuclear quiz 1

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Question 1

A simple and accurate viscometer can be made from a length of capillary tubing. If the flow rate and pressure drop are measured, and the tube geometry is known, the viscosity of Newtonian liquid can be computed. A test of a certain liquid in a capillary viscometer gave the following data:
Flow rate: 880 mm3/s, Tube length: 1 m, Tube diameter: 0.50 mm, Pressure drop: 1.0 MPa
The viscosity of liquid will be (), assuming the flow to be laminar.

Question 2

The velocity of fluid 2.234 m/s having a viscosity 0.023 Pa.s with density 2.345 is measured at a distance of 95 mm from the boundary. Find the shear stress at the boundary?

Question 3

If H is the head available at nozzle entry and is the Coefficient of velocity, the head loss in the nozzle is given by

Question 4

The effect of Cavitations is due to:

Question 5

A rectangular sheet of breadth 2m and length 15m moves through water in the longitudinal direction. The drag force on the two faces is estimated to be 9kN. Calculate the drag coefficient and boundary layer thickness at the trailing edge of the plate. Velocity of plate = 10m/s.

( Water )

Question 6

The Newtonian fluid has the following velocity fields: .  The rate of shear deformation at εyz the point X=–3, Y=–2 and Z=3 for the given flow is ___________.

Question 7

The velocity components in x and y direction are given by u = λxy3 - x2y; v = xy2 – 3/4 y4. The value of λ for a possible flow field involving an incompressible fluid is:

Question 8

If the surface tension of water in contact with air is 0.075 N/m, the correction (in mm) need to be applied towards capillary rise in the manometric reading in tubes of 2.5 mm diameter will be ____.

Question 9

The pressure difference of two very light gasses in two rigid vessels is being measured by a vertical U-tube water filled manometer. The reading is found to be 12 cm. what is the pressure difference?

Question 10

A liquid with specific gravity of 0.94 undergoes a reduction in volume of 0.22% when subjected to an increase in pressure of 1400 kPa. The velocity of propagation of sound in this liquid will be ___________m/s.
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