Multipass heat exchangers are used______________________?

Byadmin March 2, 2019August 24, 2021

Multipass heat exchangers are used______________________?

A. Because of simplicity of fabrication
B. For low heat load
C. To obtain higher heat transfer co-efficient and shorter tube
D. To reduce the pressure drop

Chemical Heat Transfer

Evaporator tubes are generally_____________________?

Evaporator tubes are generally_____________________?

A. Horizontal
B. Vertical
C. Inclined
D. Random

Read More Evaporator tubes are generally_____________________?
Chemical Heat Transfer

Thermal conductivity of a conducting solid material depends upon its_______________?

Thermal conductivity of a conducting solid material depends upon its_______________?

A. Temperature
B. Porosity
C. Both A. & B.
D. Neither A. nor B.

Read More Thermal conductivity of a conducting solid material depends upon its_______________?
Chemical Heat Transfer

Heat flux through several resistances in series in analogous to the current flowing through several_____________________?

Heat flux through several resistances in series in analogous to the current flowing through several_____________________?

A. Resistances in parallel
B. Capacitors in series
C. Resistances in series
D. None of these

Read More Heat flux through several resistances in series in analogous to the current flowing through several_____________________?
Chemical Heat Transfer

Unsteady state heat conduction occurs, when_______________?

Unsteady state heat conduction occurs, when_______________?

A. Temperature distribution is independent of time
B. Temperature distribution is dependent on time
C. Heat flows in one direction only
D. Three dimensional heat flow is concerned

Read More Unsteady state heat conduction occurs, when_______________?
Chemical Heat Transfer

As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?

As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?

A. Continues to increase
B. Continues to decrease
C. Goes through a minimum
D. Goes through a maximum

Read More As the difference between the wall temperature and bulk temperature increases, the boiling heat transfer co-efficient ?
Chemical Heat Transfer

A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?

A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?

A. Cube
B. Plate
C. Sphere
D. All will cool at the same rate

Read More A cube, sphere & a thin circular plate (all having same mass and made of same material) are all heated to 300°C and allowed to cool in natural air. Which one will cool the slowest ?

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