- (A) Parallel
- (B) Counter
- (C) Cross
- (D) None of these
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- (A) Decreased capacity
- (B) Increase in liquor film co-efficient
- (C) Decreased effect of hydrostatic head
- (D) Increased true temperature drop
- (A) D/5 and D
- (B) D/2 and 2 D
- (C) D/4 and 2 D
- (D) D and 2 D
- (A) When heat transfer area required is very high
- (B) When heat transfer area required is very low, i.e. (100-200 ft2).
- (C) Because it occupies less floor area
- (D) Because it is less costly
- (A) Zero
- (B) Unity
- (C) Same for all wavelengths
- (D) Different for all wavelengths
- (A) Δt
- (B) Δt2
- (C) Δt3
- (D) √(Δt)
- (A) 50 -100 Kcal/hr.m2.°C
- (B) 50 -100 W/m2.°K
- (C) 50 -100 BTU/hr. ft.2°F
- (D) 1000 – 1500 BTU/hr. ft.2°F
- (A) Increases
- (B) Decreases
- (C) Is not affected
- (D) May increase or decrease; depends on the feed
- (A) Baffle spacing & shell diameter
- (B) Tube diameter & pitch
- (C) Viscosity, density & mass velocity of shell side fluid
- (D) None of these
- (A) Coated
- (B) Oily
- (C) Glazed & polished
- (D) Smooth
