The value of critical Reynolds number for pipe flow is_________________?
A. 1,300
B. 10,000
C. 100,000
D. None of these
Fluid Mechanics for Chemical
The range of a particular Rotameter can be increased by__________________?
The range of a particular Rotameter can be increased by__________________?
A. Use of floats of different densities
B. No means
C. Increasing the diameter of the float
D. Decreasing the diameter of the float
Propellers are____________________?
Propellers are____________________?
A. Axial flow mixers
B. Low speed impeller
C. Used for mixing liquids of high viscosity
D. Radial flow mixers
Cavitation occurs in a centrifugal pump when the suction pressure is________________?
Cavitation occurs in a centrifugal pump when the suction pressure is________________?
A. Less than the vapour pressure of the liquid at that temperature
B. Greater than the vapour pressure of the liquid at that temperature
C. Equal to the vapour pressure
D. Equal to the developed head
Erosion and pits formation on the impeller of a centrifugal pump may be due to________________?
Erosion and pits formation on the impeller of a centrifugal pump may be due to________________?
A. Cavitation
B. Low speed of impeller
C. Its operation with delivery valve closed for considerable time after starting the pump
D. Off centering of pump with motor
What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe) ?
What is the ratio of total kinetic energy of fluid passing per second to the value obtained on the basis of average velocity (for laminar flow through a circular pipe) ?
A. 0.5
B. 1
C. 1.5
D. 2
The curve of metacentre for a floating body ____________ the curve of buoyancy?
The curve of metacentre for a floating body ____________ the curve of buoyancy?
A. Is always below
B. Is the evolute of
C. Intersects at right angle
D. Is tangential to
Slugging occurs in a fluidised bed, if the bed is___________________?
Slugging occurs in a fluidised bed, if the bed is___________________?
A. Narrow
B. Deep
C. Both A. & B.
D. Neither A. nor B.
Unsteady non-uniform flow is represented by flow through a/an_________________?
Unsteady non-uniform flow is represented by flow through a/an_________________?
A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate
In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?
In case of turbulent flow of a Newtonian fluid in a straight pipe, the maximum velocity is equal to (where, Vavg = average fluid velocity)?
A. Vavg
B. 1.2 Vavg
C. 1.5 Vavg
D. 1.8 Vavg