Related Questions

In a annutal behavior experiment , 50 tagged white pigeons and 200 tagged gray pigeons were released from a laboratory. Within one week, 88 percent of the white pigeons and 80.5 percent of the gray pigeons had returned to the laboratory. what percent of the total number of piegens returned to the laboratory?
A 80.5%
B 82.5%
C 82%
D 85%
A vapor whose partial pressure is less than its equilibrium vapor pressure is called a __________ vapor.
A Saturated
B Supersaturated
C Superheated
D None of these
A vapor whose partial pressure is less than its equilibrium vapor pressure is called the __________ vapor.
A Saturated
B Superheated
C Unsaturated
D Dry gaseous
The ratio of momentum diffusivity to thermal diffusivity is the __________ number.
A Prandtl
B Nusselt
C Stanton
D Grashoff
If the catalyst pore size is small in comparison with the mean free path, collisions with the pore wall controls the process'. The diffusivity under this condition is called 'Knudsen diffusivity', which is affected by the
A Pressure
B Temperature
C Both A & B
D Neither A nor B
If mass diffusivity in a mixture is equal to the thermal diffusivity, then the Lewis number is
A 0
B 1
C > 1
A vapor that exists above its critical temperature is termed as a __________ vapor.
A Saturated
B Unsaturated
C Gaseous
D Sub-cooled
If air (a non-condensing gas) is present in a condensing vapor stream, it will __________ the condensation rate of vapor.
A Increase
B Decrease
C Not affect
D Increase the condensing film co-efficient as well as
The pressure under which liquid and vapor can co-exit at equilibrium is called the __________ vapor pressure.
A Limiting
B Real
C Saturated
D Normal
The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is
A More
B Less
C Some
D Either more or less ; depends on the nature of vapor

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