A. Heat conduction to viscosity of a fluid
B. Cp/Cv of a fluid
C. Elastic force to pressure force in the fluid flow
D. Inertial force to elastic force in the fluid flow
Related Mcqs:
- The Prandtl Pitot tube measures the__________________?
A. Velocity at a point in the flow
B. Pressure at a point
C. Average flow velocity
D. Pressure difference in pipe flow - Prandtl mixing length is___________________?
A. Applicable to laminar flow problems
B. A universal constant
C. Zero at the pipe wall
D. None of these - The Prandtl mixing length is_________________?
A. Zero at the pipe wall and is a universal constant
B. Independent of radial distance from the pipe axis
C. Independent of the shear stress
D. Useful for computing laminar flow problems - For turbulent fluid flow in pipe, the expression for Prandtl one seventh power law is (where, r = pipe radius, x = distance) ?
A. V/Vmax = (x/r)1/7
B. V/Vmax = (r/x)1/7
C. V/Vmax = (x.r)1/7
D. None of these - In turbulent flow, the__________________?
A. Fluid particles move in an orderly manner
B. Momentum transfer is on molecular scale only
C. Shear stress is caused more effectively by cohesion than momentum transfer
D. Shear stresses are generally larger than in a similar laminar flow - Momentum correction factor used in fluid flow problems accounts for the__________________?
A. Change in direction of flow
B. Change in total energy
C. Change in pressure
D. Non uniform direction of velocities at inlet & outlet sections - Cavitation in a centrifugal pump can be avoided by keeping the__________________?
A. Inlet pressure high
B. Outlet pressure low
C. Inlet pressure low
D. Outlet pressure high - Fluidised beds are formed, when the__________________?
A. Fluid friction is zero
B. Gravity force is less than the fluid friction
C. Pressure forces equal gravity forces
D. Sum of the fluid friction and pressure forces is equal and opposite to gravity forces - During ageing of fluid carrying pipes, the__________________?
A. Pipe becomes smoother with use
B. Friction factor increases linearly with time
C. Absolute roughness decreases with time
D. Absolute roughness increases linearly with time - Bernoulli’s equation is dependent on the__________________?
A. First law of thermodynamics
B. Third law of thermodynamics
C. Law of conservation of momentum
D. None of these
