Graetz number is given by__________________?
Graetz number is given by__________________?
A. mCp/kL
B. kL/mCp
C. mCp/kμ
D. kμ/mCp
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View factor is important in heat transfer by_____________________?
View factor is important in heat transfer by_____________________?A. Steady state conduction
B. Natural convection
C. Forced convection
D. RadiationIn a forward feed multiple effect evaporator, the pressure is ____________________?
In a forward feed multiple effect evaporator, the pressure is ____________________?A. Highest in last effect
B. Lowest in last effect
C. Same in all effects
D. Dependent on the number of effectsSteam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?
Steam is to be condensed in a shell and tube heat exchanger, 5 m long with a shell diameter of 1 m. Cooling water is to be used for removing the heat. Heat transfer co-efficient for the cooling water, whether on shell side or tube side is the same. The best arrangement is_____________?A. Vertical heat exchanger with steam on tube side
B. Vertical heat exchanger with steam on shell side
C. Horizontal heat exchanger with steam on tube side
D. Horizontal heat exchanger with steam on shell sideThe overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m2.K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m2.K. The overall heat transfer co-efficient at this time is _____________________?
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m2.K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m2.K. The overall heat transfer co-efficient at this time is _____________________?A. 1200 W/m2.K
B. 894 W/m2.K
C. 333 W/m2.K
D. 287 W/m2.K_______________ paint has the maximum absorption coefficient ?
_______________ paint has the maximum absorption coefficient ?A. Black
B. Yellow
C. White
D. GreyFouling factor_____________________?
Fouling factor_____________________?A. Is a dimensionless quantity
B. Does not provide a safety factor for design
C. Accounts for additional resistances to heat flow
D. None of these