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.Management Sciences
Category: Fluid Mechanics for Chemical
For one dimensional flow of an incompressible fluid in unsteady state in x-direction, the continuity equation is given by_______________?
0
A. ∂u/∂x = 0
B. ∂(ρu)/∂x = 0
C. (∂u/∂x) = – (∂ρ/∂t)
D. ∂ρ/∂t = 0
Co-efficient of velocity is ___________________ the coefficient of discharge?
A. Less than
B. More than
C. Equal to
D. Not related to
What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air ?
A. 4πg/3
B. 0.01 πgH/4
C. 0.01 πgH/8
D. 0.04 πgH/3
For laminar flow through a closed conduit____________________?
A. Vmax = 2Vav
B. Vmax = Vav
C. Vmax = 1.5Vav
D. Vmax = 0.5Vav
Hydraulic _____________ works on the principle of Pascal’s law of transmission of fluid pressure?
A. Press
B. Turbine
C. Pump
D. Coupling
Viscosity of water at 40°C lies in the range of___________________?
A. 1 × 10-3 to 2 × 10-3 kg/m.s
B. 0.5 × 10-3 to 1 × 10-3 kg/m.s
C. 1 to 2 kg/m.s
D. 0.5 to 1 kg/m.s
The head developed by a centrifugal pump is largely determined by the____________________?
A. Power of the pump
B. Nature of the liquid being pumped
C. Angle of the vanes and the speed of the tip of the impeller
D. Vapour pressure of the liquid
Boundary layer separation occurs when the____________________?
A. Pressure reaches a minimum
B. Cross-section of the channel is reduced
C. Valve is closed in a pipeline
D. Velocity of sound is reached
Most commonly used joint in the underground pipe lines is the________________?
A. Sleeve joint
B. Coupling
C. Flange
D. Expansion joint
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