Black liquor generated during paper manufacture is concentrated in a___________________?

Byadmin March 3, 2019August 24, 2021

Black liquor generated during paper manufacture is concentrated in a___________________?

A. Single effect evaporator
B. Single effect evaporator followed by a crystalliser
C. Multiple effect evaporator
D. Multiple effect evaporators followed by a crystalliser

Chemical Heat Transfer

Increasing the liquor level in the evaporator results in the_______________?

Increasing the liquor level in the evaporator results in the_______________?

A. Decreased capacity
B. Increase in liquor film co-efficient
C. Decreased effect of hydrostatic head
D. Increased true temperature drop

Read More Increasing the liquor level in the evaporator results in the_______________?
Chemical Heat Transfer

The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ?

The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ?

A. Colburn
B. Reynolds
C. Prandtl
D. None of these

Read More The equation, (NSt × N2/3 Pr) = f/2, is the ____________ analogy ?
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

Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called_______________?

Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called_______________?

A. Radiation
B. Natural convection
C. Forced convection
D. Conduction

Read More Mode of heat transfer in which the fluid moves under the influence of changes in fluid pressure produced by external work is called_______________?
Chemical Heat Transfer

The absorptivity of a body is equal to its emissivity _________________?

The absorptivity of a body is equal to its emissivity _________________?

A. At a particular temperature
B. For circular bodies
C. Under thermal equilibrium
D. None of these

Read More The absorptivity of a body is equal to its emissivity _________________?
Chemical Heat Transfer

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to_____________________?

A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to_____________________?

A. d0.8
B. d-0.2
C. d-1
D. d-1.8

Read More A fluid is flowing inside the inner tube of a double pipe heat exchanger with diameter ‘d’. For a fixed mass flow rate, the tube side heat transfer co-efficient for turbulent flow conditions is proportional to_____________________?

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