Chemical Heat Transfer

Circulation pump is located below the evaporator to___________________?

Byadmin March 3, 2019August 24, 2021

Circulation pump is located below the evaporator to___________________?

A. Avoid cavitation
B. Avoid frequent priming
C. Create more suction head
D. None of these

Chemical Heat Transfer

Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?

Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?

A. Low density
B. High viscosity
C. Partial ionisation
D. Dense structure

Read More Among liquids, water has a comparatively high value of thermal conductivity, due to its__________________?
Chemical Heat Transfer

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?

A. U1 = U2
B. U2 > U1
C. U1 > U2
D. U1 = dirt factor – U2

Read More Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirt deposited on either side has coefficient U2, then_________________?
Chemical Heat Transfer

With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?

With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?

A. Decreases
B. Increases
C. Increases exponentially
D. Remain unaffected

Read More With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer ?
Chemical Heat Transfer

It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?

A. > 0.75
B. < 0.75
C. < 0.50
D. < 0.25

Read More It is not recommended to use a 1-2 shell and tube heat exchanger for a particular heat duty, whenever the LMTD correction factor is___________________?
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

Fourier’s law applies to the heat transfer by__________________?

Fourier’s law applies to the heat transfer by__________________?

A. Convection
B. Radiation
C. Conduction
D. All A., B. & C.

Read More Fourier’s law applies to the heat transfer by__________________?

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