A. A constant velocity with no acceleration
B. A fluctuating velocity
C. Attained after moving one-half of total distance
D. None of these
Related Mcqs:
- The ratio of average fluid velocity to the maximum velocity in case of laminar flow of a Newtonian fluid in a circular pipe is_____________________?
A. 0.5
B. 1
C. 2
D. 0.66 - Umf is the minimum fluidisation velocity for a bed of particles. An increase in the superficial gas velocity from 2 Umf to 2.5 Umf results in (all velocities are smaller than the entrainment velocity of the particles) no change in the_______________?
A. Drag on particles
B. Drag on column walls
C. Bed height
D. Bed voidage - Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient, Cc = co-efficient of contraction = (area of jet at vena-contracta/area of opening), Cv = co-efficient of velocity = (actual velocity at vena-contracta/theoretical velocity)?
A. Cd = Cc/Cv
B. Cd = Cc.Cv
C. Cd = Cv/ Cc
D. None of these - The terminal velocity of a particle moving through a fluid varies as dp n. The value of n is equal to _______________ in Stoke’s law regime?
A. 1
B. 0.5
C. 2
D. 1.5 - For a particle settling in water at its terminal settling velocity, which of the following is true ?
A. Buoyancy = weight + drag
B. Weight = buoyancy + drag
C. Drag = buoyancy + weight
D. Drag = weight - The terminal velocity of a solid spherical particle falling through a stationary fluid mass in the Stoke’s law range is proportional to the_____________________?
A. Inverse of fluid viscosity
B. Square of particle size
C. Difference in the densities of the particle & fluid
D. All A., B. and C. - The terminal velocity of a small sphere settling in a viscous fluid varies as the___________________?
A. First power of its diameter
B. Inverse of the fluid viscosity
C. Inverse square of the diameter
D. Square of the difference in specific weights of solid & fluid - The terminal velocity of a particle moving through a fluid varies as dp n. What is the value of n’ for Newton’s law regime ?
A. 0.5
B. 1
C. 1.5
D. 3 - In the Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is ______________ the fluid viscosity?
A. Directly proportional to
B. Inversely proportional to
C. Inversely proportional to the square root of
D. Independent of - In Newton’s law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the ______________ of its diameter?
A. Inverse
B. Square root
C. Second power
D. First power
