Related Questions

The velocity profile exhibited by laminar flow of Newtonion fluids is such that the velocity distribution w.r.t. radius of the circular pipe is a/an __________ with the apex at the centre line of the pipe.
A Hyperbola
B Parabola
C Semi-circle
D Semi-ellipse
Two fluids are flowing through two similar pipes of the same diameter. The Reynold's number is same. For the same flow rate if the viscosity of a fluid is reduced to half the value of the first fluid, the pressure drop will
A Increase
B Decrease
C Remain unchanged
D Data insufficient to predict relative pressure drop
Which of the following is insensitive to changes in pressure?
A Heat of vaporisation
B Melting point
C Heat of fusion
D Both B & C
With increase in the shear rate, the apparent viscosity of pseudoplastic fluids
A Increases
B Decreases
C Remains same
D May increase or decrease; depends on the magnitude of shear rate
A Newtonion liquid (ρ = density, μ = viscosity) is flowing with velocity v in a tube of diameter 'D'. Let Δp be the pressure drop across the length 'L'. For a laminar flow, Δp is proportional to
A L ρv²/D
B L μ;V/D²
C D ρv²/L
D Μ V/L
The velocity at which the flow changes from laminar flow to turbulent flow is called
A Critical velocity
B Velocity of approach
C Sub-sonic velocity
D Super-sonic velocity
Which of the following mechanical properties of a material is most structure insensitive?
A Modulus of elasticity (young
B Toughness
C Percentage reduction of area
D Tensile strength
Media type names are case-insensitive. State true or false.
A True
B False
For flow of fluids through packed bed, the superficial velocity is
A Less than the average velocity through channels
B More than the average velocity through channels
C Dependent on the pressure drop across the bed
D Same as the average velocity through channels
For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.
A Logarithmic
B Linear
C Hyperbolic
D Parabolic

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