Chemical Engineering Answers

The average Heat transfer coefficient for drop-wise condensation is______

(greater than/less than/equal to) the average heat transfer coefficient for film type condensation?

Comparing the flow arrangement in a heat exchnager, LMTD in parallel flow is (greater than/less than/equal to) LMTD in counter-flow?

What is the thermal diffusivity (in m³/s) of the material having properties, p-7500 kg/m³, Cp 400 J/(kg-K), k-15 W/(m-K).?

Heat transfer coefficient in laminar flow of a given fluid is (greater /smaller) than than the turbulent flow?

What is the heat flux (in W/m²) through the slab of 10cm thick if temperature drop across the slab is 40°C and the thermal conductivity of slab is 35 W/m.°C.?

a black body of total area 0.05 m² is completely enclosed in a space bounded by 15 cm thick walls. the walls have a surface area 0.5 m² and the thermal conductivity 1.07 w/m.°c. if the inner surface on the enveloping wall is to be maintained at 225 celsius and the outer wall surface is at 30 celsius , calculate the temperature of the black body. neglect the difference between inner and outer surfaces area of enveloping material.

Define the term unit operation & unit process?

Which power law states that the work required for crushing is proportional to size reduction ratio?

a) Kick's law

b). Rittengers law

c) Bond's law d) Stokes law

e) Newton's law

To store the solids short period, which storage vessel useful..........

a) Silo

b) Bin

c) Hopper

d)- All of the above

e) None of the above

In a rotary-drum filter, the fractional submergence of the drum in the slurry is about

a) 0.03 b) 0.30

c) 0.50

d) 0.90