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Engineering :: Heat Transfer

181.  For handling severely scaling liquids which of the following evaporator will be preferred?
A. Horizontal tube type B. Long vertical tube type
C. Agitated film type D. Short vertical tube
E. None of the above    
182.  The rate of energy stored in the wall will be
A. 50 kcal/min B. 50 kcal/sec
C. 50 kcal/hr D. 200 kcal/hr
E. 200 kcal/min    
183.  The range of diffusivity of gases in cm2/sec at atmospheric pressure is
A. Less than 1 B. 1
C. 5 to 1 D. 10 to 5
E. More than 10    
184.  Which of the following is a minimum boiling azeotrope?
A. Iso-butanol-water B. Molasses-water
C. Carbon disulphide-acetone D. Acetone-chloroform
E. Benzene-toluene    
185.  Which of the following is used as entrainer in acetic acid - water separation?
A. Methyl alcohol B. Hexane
C. Phosphorous D. Butyl acetate
E. Benzene.    
186.  Which of the following provides maximum contact surface for a liquid vapour system?
A. Bubble cap tower B. Packed tower
C. Sieve plant column D. Wetted wall column
187.  Diffusion coefficient of water into air at 26?C is nearly
A. 0.026 cm2/s B. 0.26 cm2/s
C. 2.6 cm2/s D. 5.2 cm2/s
E. 2.6 cm2/sec    
188.  DBA = DAB, in case of
A. Stagnet diffusion B. Equimolar counter diffusion
C. Either of (A) and (B) above D. None of the above
189.  The process of separation of solutes of different molecular sizes in a liquid solution by use of a sutable membrane is known as
A. Hyper sorption B. Distillation
C. Adsorption D. Leaching
E. Dialysis    
190.  Which of the following is an example of absorption?
A. Extraction of sugarcane juice B. Dechlorination of water
C. Removal of oil from cake D. Removal of moisture from gasoline
E. None of the above    

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