The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

1200W/m².K

894W/m².K

287 W/m².K

333W/m².K

1200W/m².K

894W/m².K

287 W/m².K

333W/m².K

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
Analogy between mass and heat transfer is not applicable in case of

Thermal or pressure mass diffusion

Viscous heating or chemical reaction

Both B and C

Same velocity profile or equal eddy diffusivities

Thermal or pressure mass diffusion

Viscous heating or chemical reaction

Both B and C

Same velocity profile or equal eddy diffusivities

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

Higher steam economy

Lower heat transfer area

Lower steam economy

Higher solute concentration in the product

Higher steam economy

Lower heat transfer area

Lower steam economy

Higher solute concentration in the product

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

Εx . εy

1/εx + 1/εy

Εx + εy

(εx + εy)/(εx + εy - εx . εy)

Εx . εy

1/εx + 1/εy

Εx + εy

(εx + εy)/(εx + εy - εx . εy)

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
In an extended surface heat exchanger, fluid having lower co-efficient

Flows outside the tubes

Can flow either inside or outside the tubes

Should not be used as it gives very high pressure drop

Flows through the tube

Flows outside the tubes

Can flow either inside or outside the tubes

Should not be used as it gives very high pressure drop

Flows through the tube

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer
Nusselt number is the ratio of the

Heat flux at the wall to that across the entire pipe

Temperature difference to the temperature gradient at the wall

Temperature gradient of the wall to that across the entire pipe

None of these

Heat flux at the wall to that across the entire pipe

Temperature difference to the temperature gradient at the wall

Temperature gradient of the wall to that across the entire pipe

None of these

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer

Heat Transfer The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer Analogy between mass and heat transfer is not applicable in case of

Heat Transfer A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

Heat Transfer The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient

Heat Transfer Nusselt number is the ratio of the

Heat Transfer
The overall heat transfer co-efficient for a shell and tube heat exchanger for clean surfaces is U0 = 400 W/m².K. The fouling factor after one year of operation is found to be hd0 = 2000 W/m².K. The overall heat transfer co-efficient at this time is

Heat Transfer
Analogy between mass and heat transfer is not applicable in case of

Heat Transfer
A multiple effect evaporator as compared to a single effect evaporator of the same capacity has

Heat Transfer
The interchange factor for radiation heat transfer from surface 'x' to surface 'y' in case of an infinite parallel planes with emis-sivities εx & εy is given by

Heat Transfer
In an extended surface heat exchanger, fluid having lower co-efficient

Heat Transfer
Nusselt number is the ratio of the