A. 1
B. -1
C. 0.5
D. -0.5
Related Mcqs:
- For motion of spherical particles in a stationary fluid, the drag co-efficient in hindered settling compared to that in free settling is _______________?
A. More
B. Less
C. Equal
D. More or less, depending on the type of particle - A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke’s law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity ?
A. Same as that of A
B. One fourth as that of A
C. Twice as that of A
D. Four times as that of A - Bernoulli’s equation for fluid flow is derived following certain assumptions. Out of the assumptions listed below, which set of assumptions is used in derivation of Bernoulli’s equation? A. Fluid flow is frictionless & irrotational. B. Fluid flow is steady. C. Fluid flow is uniform & turbulent. D. Fluid is compressible. E. Fluid is incompressible ?
A. A, C, D
B. B, D, E
C. A, B, E
D. A, D, E - Brownian movement is prominent in the particle size range of _____________ microns in case of settling of a particle in a fluid?
A. 2 to 3
B. 0.01 to 0.10
C. 200 to 300
D. 100 to 1000 - 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 - 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 - Drag co-efficient in hindered settling is _____________ that in free settling?
A. Less than
B. Equal to
C. Not necessarily greater than
D. Always greater than - Friction factor for a hydraulically smooth pipe at NRe = 2100 is f1. If the pipe is further smoothened (i.e., roughness is reduced), the friction factor at the same value of NRe, will_______________?
A. Increase
B. Decrease
C. Remain unchanged
D. Increase or decrease depending on the pipe material - Forces acting on a particle settling in fluid are _____________ forces?
A. Gravitational & buoyant
B. Centrifugal & drag
C. Gravitational or centrifugal buoyant drag
D. External, drag & viscous - 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
