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Fluid Mechanics Quiz 1

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Question 1

The stability of a floating body is obtained when its

Question 2

The stream function in a two-dimensional flow field is given by Ψ = x2 –y.Then the magnitude of velocity at point (1, 1) is ___________.

Question 3

When the pressure on a given mass of liquid is increased from 3.0MPa to 3.5 MPa, the density of the liquid increases from 500 kg/m3 to 501 kg/m3. What is the average value of bulk modulus of liquid over the given pressure range?

Question 4

The velocity potential function is given by an expression The velocity component in x direction is

Question 5

The force in (newton) required to lift a thin wire ring of diameter 2cm from a water surface of given surface tension at 21 C is 2N/cm

Question 6

If a workpiece is moved by 50 mm in 10 s by a piston of diameter 100 mm, the hydraulic liquid flow rate is nearly

Question 7

For a fully developed flow or water in a pipe having diameter 10 cm, velocity 0.1 m/s and kinematic viscosity Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-2014-Set-1_files\image146.png, the value of Darcy friction factor is ____

Question 8

The hydraulic diameter of a rectangular pipe having sides of 4 cm and 6 cm is ____.

Question 9

Water at 30°C is flowing between walls. The velocity distribution is given by u = 5(0.01y-y2) m/s, where y is measured in meters from the lower wall. The shear stress at the lower wall in N/m2 is? [Take viscosity of water as 1.005 Ns/m²]

Question 10

Match List I with List II and select the correct answer using the code given below the lists

List-I

P. Pelton Turbine

Q. Francis Turbine

R. Kaplan Turbine

List-II

1) Adjustable blade angles

2) No cavitation

3) Draft Tube

Codes:

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