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BARC 2020: Fluid Mechanics Nuclear quiz 4

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Question 1

An inverted U-tube is connected across two pipes A and B carrying fluids as shown. What will be the pressure difference between the centre lines of the pipes ________ N/m². Liquid density=1.1 manometric fluid density=0.7

Question 2

Water in a pipe is flowing at speed of 25m/s with pressure 550kN/m² which is 45m above sea level. What will be the total head of water in meters?

Question 3

In figure, if the pressure of gas in bulb A is 50 cm Hg vacuum and p_atm = 76 cm Hg, the height of column H is equal to

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Question 4

A U-tube is made-up of two capillaries of diameters 1.0 mm and 1.5 mm respectively. The U-tube is kept vertically and partially filled with water of surface tension 0.0075 kg/m and zero contact angle. The differences in the level of meniscus caused by the capillarity is______ mm.

Question 5

In a laminar flow through a circular pipeline of 10 cm diameter, the flow velocity at a radial distance of 2.5 cm from the pipe axis is 0.5 m/s. The maximum flow velocity(in m/s) is ____________.

Question 6

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 7

For the stream friction Ψ=3x²y-y³ the velocity at point (2, 3) is _________.

Question 8

A smooth flat plate of size 2m × 2m is kept immersed in water that moves with a velocity of 0.4 m/s. Find the thickness of the boundary layer at a distance of 0.75 m from the leading edge. Take the kinematic viscosity of water to be 1×10^-4m²/s.

Question 9

A steady incompressible, two dimensional velocity field is given by

The distance of stagnation point from the origin of reference axes will be _______.

Question 10

A tank is moving with a velocity of 2 m/sec is placed on friction less pulleys due to orifice is fitted to one side of tank. Velocity of jet is 6 m/sec. Find propelling force acting on tank (N). Take orifice diameter is 200 mm.

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ESE & GATE ME Fluid Mechanics & Machinery

Apr 15ESE & GATE ME