A. Thin walled having the value of Ao Ai/< 2
B. Thick walled
C. Having the value of Ao/Ai > 2
D. Both B. and C.
A. Reynolds
B. Nusselt
C. Grashoff
D. Both B. & C.
A. A section of the exchanger in which change in temperature of one stream equals the average
driving force in the section
B. The size of the exchanger in which heat transfer rate is 1 kcal/hr
C. Both A. and B.
D. None of these
A. Only counter-flow of fluids
B. Only parallel-flow of fluids
C. Both counter and parallel-flow of the fluids
D. Smaller pressure drop compared to 1-2 exchanger
A. 0.25 D
B. 0.50 D
C. 0.75 D
D. None of these
A. 180
B. 970
C. 3.97
D. None of these
A. Is not the same as baffle pitch
B. Should be less than one fifth the diameter of the shell
C. Should be less than the inside diameter of the shell
D. None of these
A. ∝ t
B. ∝ 1/t
C. ∝ √t
D. Independent of ‘t’
A. Avoid buckling of tubes
B. Provide support for tubes
C. Decrease the pressure drop
D. Facilitate its lengthening, if needed
A. Alcohol
B. Distilled water
C. Salt
D. Fruits jam