Chemical Heat Transfer

Fourier’s law applies to the heat transfer by__________________?

Byadmin March 3, 2019August 24, 2021

Fourier’s law applies to the heat transfer by__________________?

A. Convection
B. Radiation
C. Conduction
D. All A., B. & C.

Chemical Heat Transfer

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?

A. Tube layout
B. Tube diameter
C. Tube pitch
D. Number of baffles

Read More In a shell and tube heat exchanger, the shell side fluid velocity can‟t be changed by changing the_________________?
Chemical Heat Transfer

In forced circulation, the heating element is injected_________________?

In forced circulation, the heating element is injected_________________?

A. Internally
B. Externally
C. Both A. and A.
D. Neither A. nor B.

Read More In forced circulation, the heating element is injected_________________?
Chemical Heat Transfer

The critical radius ‘r’ of insulation on a pipe is given by____________________?

The critical radius ‘r’ of insulation on a pipe is given by____________________?

A. r = 2k/h
B. r = k/h
C. r = k/2h
D. r = h/k

Read More The critical radius ‘r’ of insulation on a pipe is given by____________________?
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

With increase in temperature, the thermal conductivity of fresh lubricating oil ___________________?

With increase in temperature, the thermal conductivity of fresh lubricating oil ___________________?

A. Increases
B. Decreases
C. Remains unchanged
D. May increase or decrease; depends on its composition

Read More With increase in temperature, the thermal conductivity of fresh lubricating oil ___________________?
Chemical Heat Transfer

The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

A. More
B. Less
C. Same
D. Unpredictable

Read More The equivalent diameter for the annulus of a double pipe heat exchanger, whose inner pipe has fins on the outside is ______________ compared to the same size pipes without fins?

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