Chemical Heat Transfer

In which mode of heat transfer, the Biot number is important ?

Byadmin March 3, 2019August 24, 2021

In which mode of heat transfer, the Biot number is important ?

A. Transient heat conduction
B. Natural convection
C. Forced convection
D. Radiation

Chemical Heat Transfer

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?

Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?

A. Boiling point
B. Dynamic viscosity
C. Kinematic viscosity
D. Density

Read More Boiling point elevation for a strong and concentrated solution is found by Duhring’s rule, which states that at the same pressure, the boiling point of a solution is a linear function of the _______________ of pure water?
Chemical Heat Transfer

Heat flux through several resistances in series in analogous to the current flowing through several_____________________?

Heat flux through several resistances in series in analogous to the current flowing through several_____________________?

A. Resistances in parallel
B. Capacitors in series
C. Resistances in series
D. None of these

Read More Heat flux through several resistances in series in analogous to the current flowing through several_____________________?
Chemical Heat Transfer

In a backward feed multiple effect evaporator ___________________ ?

In a backward feed multiple effect evaporator ___________________ ?

A. Feed is introduced in the first effect
B. Feed flows from low pressure to high pressure
C. No pumps are required between successive effects
D. None of these

Read More In a backward feed multiple effect evaporator ___________________ ?
Chemical Heat Transfer

Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately ?

Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately ?

A. 32
B. 37
C. 45
D. 50

Read More Hot water (0.01 m3 /min) enters the tube side of a counter current shell and tube heat exchanger at 80°C and leaves at 50°C. Cold oil (0.05 m3/min) of density 800 kg/m3 and specific heat of 2 kJ/kg.K enters at 20°C. The log mean temperature difference in °C is approximately ?
Chemical Heat Transfer

Fouling 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

Read More Fouling factor_____________________?
Chemical Heat Transfer

Cpμ/K is termed as the ______________ number?

Cpμ/K is termed as the ______________ number?

A. Grashoff
B. Nusselt
C. Prandtl
D. Stanton

Read More Cpμ/K is termed as the ______________ number?

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