Chemical Heat Transfer

Which is the most suitable for the concert-ration of highly concentrated solution ?

Byadmin March 3, 2019August 24, 2021

Which is the most suitable for the concert-ration of highly concentrated solution ?

A. Open pan evaporation
B. Long tube vertical evaporator
C. Agitated film evaporator
D. None of these

Chemical Heat Transfer

The actual temperature drop across the heating surface of an evaporator depends on the_______________?

The actual temperature drop across the heating surface of an evaporator depends on the_______________?

A. Liquid depth over the heating surface
B. Solution being evaporated
C. Pressure difference between the steam chest and the vapor space above the boiling liquid
D. All A., B. and C.

Read More The actual temperature drop across the heating surface of an evaporator depends on the_______________?
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 ?
Chemical Heat Transfer

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows _____________ law?

If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows _____________ law?

A. Parabolic
B. Hyperbolic
C. Linear
D. Logarithmic

Read More If the thermal conductivity of a wall material is independent of temperature, the steady state temperature distribution in the very large thin plane wall having steady, uniform surface temperature follows _____________ law?
Chemical Heat Transfer

The heat transfer co-efficient in film type condensation is _______________ that for dropwise condensation?

The heat transfer co-efficient in film type condensation is _______________ that for dropwise condensation?

A. Greater than
B. Lower than
C. Is same as
D. Half

Read More The heat transfer co-efficient in film type condensation is _______________ that for dropwise condensation?
Chemical Heat Transfer

Tube pitch is the _______________ of tube diameters and the clearances?

Tube pitch is the _______________ of tube diameters and the clearances?

A. Sum
B. Difference
C. Ratio
D. None of these

Read More Tube pitch is the _______________ of tube diameters and the clearances?
Chemical Heat Transfer

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

A. Economiser
B. Regenerator
C. Ceramic recuperator
D. None of these

Read More Sensible heat of hot industrial flue gases cannot be recovered by a/an________________?

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