In a heat exchanger, floating head is provided to____________________?

Byadmin March 3, 2019August 24, 2021

In a heat exchanger, floating head is provided to____________________?

A. Facilitate cleaning of the exchanger
B. Increase the heat transfer area
C. Relieve stresses caused by thermal expansion
D. Increase log mean temperature gradient

Chemical Heat Transfer

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?

A. Temperature of the body only
B. Wavelength of monochromatic radiation
C. Both A. and B.
D. Nature of material of body

Read More As per Kirchoff‟s law, the ratio of the total radiating power to the absorptivity of a body depends on the_______________?
Chemical Heat Transfer

Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?

Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?

A. Current
B. Voltage
C. Resistance
D. None of these

Read More Heat flux, as defined in heat flow is analogous to _______________ in electricity flow?
Chemical Heat Transfer

Mechanical recompression evaporation is used in the production of____________________?

Mechanical recompression evaporation is used in the production of____________________?

A. Alcohol
B. Distilled water
C. Salt
D. Fruits jam

Read More Mechanical recompression evaporation is used in the production of____________________?
Chemical Heat Transfer

Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?

Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?

A. 35.5
B. 43.75
C. 81.25
D. 48.25

Read More Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer coefficient is „3k/l’. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade ?
Chemical Heat Transfer

Prandtl number is given by__________________?

Prandtl number is given by__________________?

A. CP μ/a
B. hD/k
C. CP μ/k
D. μ/h CP

Read More Prandtl number is given by__________________?
Chemical Heat Transfer

The unit of heat transfer co-efficient in SI unit is____________________?

The unit of heat transfer co-efficient in SI unit is____________________?

A. J/M2°K
B. W/m2°K
C. W/m°K
D. J/m°K

Read More The unit of heat transfer co-efficient in SI unit is____________________?

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