Chemical Heat Transfer

Maximum heat transfer rate is achieved in _____________ flow?

Byadmin March 2, 2019August 24, 2021

Maximum heat transfer rate is achieved in _____________ flow?

A. Co-current
B. Counter-current
C. Turbulent
D. Laminar

Chemical Heat Transfer

Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is__________________?

Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is__________________?

A. 0.4
B. 0.5
C. 0.6
D. 0.7

Read More Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is__________________?
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

The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid_________________?

The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid_________________?

A. Its evaporation loss
B. Excessive corrosion
C. Uneconomic LMTD
D. Decrease in heat exchanger efficiency

Read More The outlet temperature of cooling water in a heat exchanger is generally not allowed to exceed above 50°C in industrial practice mainly to avoid_________________?
Chemical Heat Transfer

Crystallisation of solids from a homogeneous solution is a/an ______________ process?

Crystallisation of solids from a homogeneous solution is a/an ______________ process?

A. Exothermic
B. Mildly endothermic
C. Highly endothermic
D. None of these

Read More Crystallisation of solids from a homogeneous solution is a/an ______________ process?
Chemical Heat Transfer

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?

A. Square pitch
B. Triangular pitch
C. Diagonal square pitch
D. None of these

Read More Which is the best tube arrangement (in a shell and tube heat exchanger) if the fluids are clean and non-fouling ?
Chemical Heat Transfer

Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?

Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?

A. Thin walled having the value of Ao Ai/< 2
B. Thick walled
C. Having the value of Ao/Ai > 2
D. Both B. and C.

Read More Arithmetic mean area can be used in heat transfer problem to calculate the heat flow by conduction through a cylinder which is ____________________?

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