Heat Transfer

1. "The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium". This is _________ law.

1. Kirchoff’s
2. Planck's
3. Wien's displacement
4. Stefan-Boltzmann

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2. 'Duhring's plot' is of use in

1. Extractive distillation
2. Evaporation
3. Leaching
4. Absorption

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3. 'Fouling factor' used in the design of a multipass shell and tube heat exchanger is a

1. Non-dimensional factor
2. Factor of safety
3. Conversion factor for individual film heat transfer co-efficient to overall heat transfer coefficient
4. None of these

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4. _________ chart is known as transient heat conduction chart.

1. Dirhing's
2. Heisler's
3. Mollier's
4. Cox

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5. _________ equation relates the thermal conductivity of a solid to its temperature.

1. Antoine
2. Kopp's
3. Lee's
4. Kistyakowsky

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6. _________ heat exchanger is the most suitable, when the temperature of shell side fluid is much higher than that of tube side.

1. Single pass, fixed tube sheet
2. U-tube
3. Three pass, fixed tube sheet
4. None of these

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7. _________ heat exchanger is used for chilling oil to be dewaxed.

1. U-tube
2. Double pipe
3. Fixed tube
4. Floating head

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8. _________ paint has the maximum absorption coefficient.

1. Black
2. Yellow
3. White
4. Grey

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9. _________ paint has the minimum absorption co-efficient.

1. Black
2. White lead
3. Grey
4. Light cream

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10. 1 BTU/hr.ft.°F is equal to _________ kcal/hr. m.°C.

1. 1.49
2. 1
3. 4.88
4. None of these

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