Related Questions

Particle size range in which dust catcher (gravity settling chamber) works most effectively and efficiently is __________ microns.
A [

A.

B. 10 to 25

B > 1000
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
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 process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as
A Conduction
B Free convection
C Forced convection
D Radiation
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
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
Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.
A 1 to 100
B 0.5 to 50
C 10 to 100
D 100 to 1000
The range of electromagnetic spectrum important in heat transfer by radiation is __________ microns.
A 0.38-0.78
B 0.5-50
C 100-1000
D 5-50
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
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as
A Conduction
B Free convection
C Forced convection
D Radiation

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