Category: Chemical Heat Transfer

A. Non-dimensional factor
B. Factor of safety
C. Conversion factor for individual film heat transfer co-efficient to overall heat transfer coefficient
D. None of these

A. The condensing film co-efficient is about 3 times lower for vertical condenser as compared to the equivalent horizontal condenser for identical situation
B. Film co-efficient for vaporisation decreases as a result of vapor binding
C. In industrial practice, sub-cooling of condensate is required, when the condensate is a volatile
liquid and is to be transferred for storage
D. Overall heat transfer co-efficient in a heat exchanger is controlled by the value of the film coefficient,
which is higher

A. J/M2°K
B. W/m2°K
C. W/m°K
D. J/m°K

A. J.m-2.K-1
B. J.m-1.K-1
C. W.m-2.K-1
D. W-1m2K

A. Increases rapidly with temperature rise
B. Decreases rapidly with temperature rise
C. In independent of pressure
D. Both B. and C.

A. Get economical temperature difference by using moderate pressure steam
B. Facilitate forward feeding in multiple effect evaporation
C. Concentrate heat sensitive materials
D. Achieve very high concentration of the final product

A. Thermal conductivity
B. Thickness
C. Temperature difference
D. Heat transfer area

A. Boiler
B. Heat exchanger
C. Recuperator
D. Regenerator

A. Conduction
B. Radiation
C. Condensation
D. Natural convection

A. Decrease
B. Increase
C. First decrease and then increase
D. First increase and then decrease