A. Rises in the tube
B. Rotates at higher speed
C. Rotates at lower speed
D. Drops down in the tube
Related Mcqs:
- Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the___________________?
A. Length of the pipe
B. Diameter of the pipe
C. Density of the fluid
D. Velocity of the fluid - In a counter flow heat exchanger, hot fluid enters at 170°C & leaves at 150°C, while the cold fluid enters at 50°C & leaves at 70°C. The arithmetic mean temperature difference in this case is ______________ °C?
A. 20
B. 60
C. 120
D. ∞ - The most economical channel section for the fluid flow is the one for which the discharge is maximum for a given cross-sectional area. Vertical velocity distribution in an open channel for laminar flow can be assumed to be_______________?
A. Parabolic
B. Hyperbolic
C. Straight line
D. None of these - Gage pressure within a spherical droplet of a fluid is ‘p’. What will be gage pressure within a bubble of the same size & of the same fluid ?
A. p
B. 2 p
C. 0.5 p
D. 0.25 p - A fluid is termed as the Newtonian fluid, when the shear stress is _________________ the velocity gradient ?
A. Independent of
B. Inversely proportional to
C. Directly proportional to
D. None of these - Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30% ?
A. 9,100
B. 13,000
C. 7,000
D. 2,550 - At the point of boundary layer separation in fluid flow, the _____________________?
A. Shear stress is maximum
B. Velocity gradient is flat
C. Density variation is maximum
D. Shear stress is zero - Friction factor for fluid flow in pipe does not depend upon the________________?
A. Pipe length
B. Pipe roughness
C. Fluid density & viscosity
D. Mass flow rate of fluid - _______________ number determines whether the fluid flow in an open channel is super-critical, critical or sub-critical ?
A. Mach
B. Reynolds
C. Froude
D. Weber - The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where, A = cross-sectional area of the pipe & D = Diameter of the pipe) ?
A. A
B. D
C. 1/A
D. 1/A2
