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HEAT TRANSFER

Heat Transfer
The driving potential for the crystal growth during crystallisation is the __________ of the solution.

Density
Viscosity
Concentration
Super-saturation

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Heat Transfer
The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m². The flux, when the element temperature is increased to 1000°C for the same furnace temperature is

16.5 kW/m²
11.2 kW/m²
12.0 kW/m²
14.6 kW/m²

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Heat Transfer
The purpose of floating head in a heat exchanger is to

Avoid buckling of tubes
Facilitate its lengthening, if needed
Provide support for tubes
Decrease the pressure drop

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Heat Transfer
Extremely large or small volumes of fluids are generally best routed through the shell side of a shell and tube heat exchanger, because of the

Flexibility possible in the baffle arrangement
High heat transfer co-efficient
Less corrosion problems
Low pressure drop

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Heat Transfer
Heat waves

Travel in straight line
Can be reflected by a mirror
Both B and C
Can not pass through vacuum

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