Chemical Heat Transfer

A diathermanous substance _______________ the thermal radiation completely?

Byadmin March 3, 2019August 24, 2021

A diathermanous substance _______________ the thermal radiation completely?

A. Absorbs
B. Reflects
C. Transmits
D. None of these

Chemical Heat Transfer

Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?

Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?

A. Long vertical evaporator
B. Horizontal tube evaporator
C. Agitated film evaporator
D. Calandria vertical tube evaporator

Read More Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?
Chemical Heat Transfer

In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell) ?

In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell) ?

A. 0.25 D
B. 0.50 D
C. 0.75 D
D. None of these

Read More In a shell and tube heat exchanger, the height of 25 percent cut baffles is equal to (where, D = inside diameter of shell) ?
Chemical Heat Transfer

For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are__________________?

For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are__________________?

A. Same
B. Different
C. Never different
D. Linearly related

Read More For a fluid flowing in an annulus space, the wetted perimeter for heat transfer and pressure drop are__________________?
Chemical Heat Transfer

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?

A. Nucleate
B. Pool
C. Low pressure
D. None of these

Read More In case of _____________ boiling, the bubbles formed on a submerged hot surface get absorbed in the mass of the liquid?
Chemical Heat Transfer

In natural convection heat transfer, the correlating parameter is the_______________________?

In natural convection heat transfer, the correlating parameter is the_______________________?

A. Graetz number
B. Eckert number
C. Grashoff number
D. Bond number

Read More In natural convection heat transfer, the correlating parameter is the_______________________?
Chemical Heat Transfer

Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?

Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?

A. 0
B. 0.5
C. 1
D. 5

Read More Prandtl and Reynold’s analogies are identical for Prandtl number value of__________________?

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