Chemical Heat Transfer

Chemical Heat Transfer

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?

A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?

A. Condensation
B. Grashoff
C. Stanton
D. Brinkman

Read More A measure of the extent to which viscous heating is important relative to the heat flow resulting from the impressed temperature difference is represented by the _______________ number?
Chemical Heat Transfer

Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?

A. Keeg the heat transfer surface clean
B. Enhancing the fluid pumg rate
C. Increasing the tube length
D. None of these

Read More Heat transfer efficiency leading of energy conservation in a heat exchanger can be achieved by____________________?
Chemical Heat Transfer

Which is the most suitable for the concert-ration of highly concentrated solution ?

Which is the most suitable for the concert-ration of highly concentrated solution ?

A. Open pan evaporation
B. Long tube vertical evaporator
C. Agitated film evaporator
D. None of these

Read More Which is the most suitable for the concert-ration of highly concentrated solution ?
Chemical Heat Transfer

A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?

A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?

A. Ellipse
B. Straight line
C. Parabola
D. Circular arc

Read More A hot liquid is kept in a big room. The logarithm of the numerical value of the temperature difference between the liquid and the room is plotted against time. The plot will be very nearly a/an___________________?
Chemical Heat Transfer

A hot body will radiate heat most rapidly, if its surface is___________________?

A hot body will radiate heat most rapidly, if its surface is___________________?

A. White & rough
B. Black & rough
C. White & polished
D. Black & polished

Read More A hot body will radiate heat most rapidly, if its surface is___________________?
Chemical Heat Transfer

Rate of heat transfer by vaporisation from pools of water is affected by the ____________________?

Rate of heat transfer by vaporisation from pools of water is affected by the ____________________?

A. Nature of heating surface and distribution of bubbles
B. Surface tension of water
C. Viscosity of water
D. All A., B. and C.

Read More Rate of heat transfer by vaporisation from pools of water is affected by the ____________________?
Chemical Heat Transfer

The purpose of providing bleed points in the evaporator is to__________________?

The purpose of providing bleed points in the evaporator is to__________________?

A. Admit the feed
B. Remove the product
C. Facilitate removal of non-condensable gases
D. Create vacuum

Read More The purpose of providing bleed points in the evaporator is to__________________?
Chemical Heat Transfer

With increase in temperature, the thermal conductivity of steel___________________?

With increase in temperature, the thermal conductivity of steel___________________?

A. Increases
B. Decreases
C. Remains unchanged
D. Increases exponentially

Read More With increase in temperature, the thermal conductivity of steel___________________?
Chemical Heat Transfer

In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?

In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?

A. Infinity
B. Zero
C. Same as average heat transfer co-efficient for tube side
D. None of these

Read More In a shell and tube heat exchanger, the tube side heat transfer co-efficient just at the entrance of the tube is_________________?
Chemical Heat Transfer

Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?

Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?

A. Liquid density
B. Liquid viscosity
C. Hot surface temperature
D. Interfacial tension

Read More Which of the following is the most controlling factor for the rate of bubble detachment from the hot solid surface ?