Single pass, fixed tube sheet
U-tube
Three pass, fixed tube sheet
None of these
✅ The correct answer is option B.
Engineering MCQs
Agitated film evaporator is suitable for concentrating __________ liquids.
Foaming
Viscous
Very thin
Corrosive
✅ The correct answer is option B.
Reason for operating an evaporator in multiple effect is to secure
Increased steam economy
Decreased steam consumption
Both A and B
Increased capacity
✅ The correct answer is option C.
One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to
Heat the water from 0°C to 100°C
Evaporate the water
To superheat the steam
Data insufficient, can
✅ The correct answer is option B.
A perfect black body is a perfect __________ of radiation.
Absorber
Emitter
Both A & B
Neither A nor B
✅ The correct answer is option C.
At what value of Prandtl number, the hydrodynamic and thermal boundary layers are identical?
0.5
1
1.5
80
✅ The correct answer is option B.
In SI units, fouling factor is expressed in
m²°K/W
W/m²°K
m²°K
m°K/W
✅ The correct answer is option A.
The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is
Nusselt number
Sherwood number
Schmidt number
Stanton number
✅ The correct answer is option C.
In case of a supercooled solution, which is on the verge of crystallisation, the free energy of the solution as compared to that of the solid is
More
Less
Same
More or less; depends on the nature of solution
✅ The correct answer is option A.
The most conducive surface for dropwise condensation to occur is the __________ surface.
Coated
Oily
Glazed & polished
Smooth
✅ The correct answer is option B.