Related Questions

An equipment which converts the latent or sensible heat of one fluid into the latent heat of vaporisation of another, is called a
A Boiler
B Heat exchanger
C Recuperator
D Regenerator
The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation
A Increases with pressure rise
B Decreases with increasing pressure
C Becomes zero at the critical point
D Both B & C
Heat sensitive materials with very high latent heat of vaporisation may be economically separated using
A Liquid extraction
B Distillation
C Evaporation
D Absorption
At lower temperatures and pressures, the latent heat of vaporisation of a refrigerant
A Decreases
B Increases
C Remains same
D Depends on other factors
The solvent used in liquid extraction should not have high latent heat of vaporisation, because
A The pressure drop and hence the pumping cost will be very high
B It cannot be recovered by distillation
C Its recovery cost by distillation may be prohibitatively high
D It will decompose while recovering by distillation
Which of the following is not used for computing latent heat of vaporisation?
A Clausius-Clayperon equation
B Reference substance plots based on Durhing & Othmer plots
C Kistyakowasky's equation
D Hess
The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is
A Less
B More
C Equal
D May be less or more depending on temperature
The heat of vaporisation __________ with increase in pressure.
A Increases
B Decreases
C Becomes zero at critical pressure
D Both B and C
Rate of heat transfer by vaporisation from pools of water is affected by the
A Nature of heating surface and distribution of bubbles
B Surface tension of water
C Viscosity of water
D All of the above
To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than
A 2.4 m above the hydraulic gradient
B 6.4 m above the hydraulic gradient
C 10.0 m above the hydraulic gradient
D 5.0 m above the hydraulic gradient

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