- (A) Less corrosion problems
- (B) Flexibility possible in the baffle arrangement
- (C) Low pressure drop
- (D) High heat transfer co-efficient
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- (A) Increase the heating load
- (B) Impart structural strength
- (C) Account for the uneven expansion of shell and tube bundles
- (D) Facilitate increase of shell length, if needed
- (A) Because of simplicity of fabrication
- (B) For low heat load
- (C) To obtain higher heat transfer co-efficient and shorter tube
- (D) To reduce the pressure drop
- (A) > 0.75
- (B) < 0.75
- (C) < 0.50
- (D) < 0.25
- (A) Give larger area per tube
- (B) Use metal fins of low thermal conductivity
- (C) Facilitate very large temperature drop through tube wall
- (D) Are used for smaller heat load
- (A) Long tube
- (B) Falling film
- (C) High pressure
- (D) None of these
- (A) D-1.8
- (B) D-0.2
- (C) D0.2
- (D) D1.8
- (A) Is inversely proportional to the resistance across which the drop occurs
- (B) And the wall are proportional to individual resistances
- (C) And the wall is not related
- (D) None of these
- (A) Solution has an elevation of boiling point
- (B) Evaporators operate under vacuum
- (C) Evaporators operate at atmospheric pressure
- (D) None of these
- (A) Grashoff
- (B) Biot
- (C) Stanton
- (D) Reynolds
