141.Correction for capillary effect in manometers (used for pressure measurement) need not be applied, if diameter of the manometer tube is _________ mm.
< 4
> 4
> 12.5
< 10
Correct answer: (C) > 12.5
142.Cp/Cv is termed as
Adiabatic constant
Mach number
Weber number
Prandtl number
Correct answer: (A) Adiabatic constant
143.Creeping flow around a sphere is defined, when particle Reynolds number is
< 2100
< 0.1
> 2.5
< 500
Correct answer: (B) < 0.1
144.Critical velocity in a pipe flow
Increases as fluid viscosity increases
Increases as pipe diameter increases
Independent of fluid density
None of these
Correct answer: (B) Increases as pipe diameter increases
145.Dean number is concerned with the
Fluid-particle interaction
Fluid flow through helical pipes
Power consumption in agitated vessels
Psychrometry
Correct answer: (B) Fluid flow through helical pipes
146.Deformation drag, which is caused by widespread deformation of fluid around the immersed body
Occurs when NRe is very small
Is primarily a friction drag
Is independent of body length
Depends mainly on cross-sectional shape
Correct answer: (A)
Occurs when NRe is very small
147.Design of the casing of centrifugal pump should be such as to minimise the
Back flow through impeller
Loss of kinetic head
Loss of static head
None of these
Correct answer: (B) Loss of kinetic head
148.Diaphragm pumps are used to transport
Solids
Liquids
Fluids
Slurries
Correct answer: (D) Slurries
149.Diaphragm valves are used for handling _________ fluids.