Chemical Heat Transfer

The equivalent diameter for pressure drop is ________________ that for heat transfer?

Byadmin March 3, 2019August 24, 2021

The equivalent diameter for pressure drop is ________________ that for heat transfer?

A. Smaller than
B. Greater than
C. Equal to
D. Not related with

Chemical Heat Transfer

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?

A. Heat the water from 0°C to 100°C
B. Evaporate the water
C. To superheat the steam
D. Data insufficient, can’t be predicted

Read More One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?
Chemical Heat Transfer

Which of the following situations can be approximated to a steady state heat transfer system ?

Which of the following situations can be approximated to a steady state heat transfer system ?

A. A red hot steel slab (having outside surface temperature as 1300°C) exposed to the
atmospheric air at 35°C
B. 10 kg of dry saturated steam at 8 kgf/cm2 flowing through a short length of stainless steel pipe
exposed to atmospheric air at 35°C
C. Boiling brine kept in open vessel when the bottom surface temperature of the vessel is
maintained constant at 180°C
D. A sub-cooled refrigerant liquid at 8°C flowing at the rate of 6 Kg/minute through a copper
pipe exposed to atmospheric air at 35°C

Read More Which of the following situations can be approximated to a steady state heat transfer system ?
Chemical Heat Transfer

Which of the following has the lowest overall heat transfer co-efficient ?

Which of the following has the lowest overall heat transfer co-efficient ?

A. Dowtherm
B. Molten sodium
C. Water
D. Air

Read More Which of the following has the lowest overall heat transfer co-efficient ?
Chemical Heat Transfer

During crystallisation, formation of crystal can occur in ______________ solution only?

During crystallisation, formation of crystal can occur in ______________ solution only?

A. Saturated
B. Supersaturated
C. Under-saturated
D. All A., B. and C.

Read More During crystallisation, formation of crystal can occur in ______________ solution only?
Chemical Heat Transfer

LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?

LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?

A. 0
B. 1
C. > 1
D. < 1

Read More LMTD correction factor which is to be applied for a cross-flow heat exchanger increases with increase in the number of shell passes. Its value for a single pass cross flow heat exchanger is __________________?
Chemical Heat Transfer

Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the _____________ zone?

Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the _____________ zone?

A. Laminar
B. Transition
C. Both A & B
D. Highly turbulent

Read More Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the _____________ zone?

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