In fluid flow, heat and mass transfer, one encounters (i) kinematic viscosity μ (ii) molecular diffusivity (θ) and (iii) thermal diffusivity (α) the units of these quantities are:
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Metallurgical Engineering · all questionsMiscellaneous in Metallurgy
Miscellaneous in Metallurgy
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Dislocations are
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Nusselt number/Biot number varies
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Maximum upper critical temperature in iron carbon diagram is
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In general, the ratio of mixing time and circulation in bioreactor is
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What are the applications of cold rolled steel
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Consider the following collection of polymer chains.
Mer unit is ethylene. Atomic weights: carbon (12) and, hydrogen (1). Calculate number average degree of polymerisation.
| No. of molecules | 10 | 5 | 4 | 2 | 1 |
| Molecular weight gm.mol-1 | 2800 | 3000 | 1200 | 3600 | 1000 |
Mer unit is ethylene. Atomic weights: carbon (12) and, hydrogen (1). Calculate number average degree of polymerisation.
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. . . . . . . . theory is applied for plastic deformation
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Glycogen, a naturally occurring polymer stored in animals is a
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Gray cast iron is usually welded by
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The following thermo couple may be used for measuring temperature upto 1873 K.
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Which of the following facts about dislocations is false?
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A screw dislocation has
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. . . . . . . . is that flow in which density fluid remains almost constant throughout flow.
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Particulate reinforcements have . . . . . . . . dimensions in all directions.
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. . . . . . . . decides the formation of vortex in stir casting process.
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Attraction force between dislocations of opposite sign is . . . . . . . .
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In general, strongest polymer group is
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At steady state and when the inner and outer walls of a long hollow cylinder are kept at two different temperatures, the unidirectional temperature variation along the thickness of the wall is
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A furnace wall is made of three materials (I, II and III) of equal thickness and having thermal conductivity k1 k2 and k3 respectively. The steady state temperature profile inside each material is shown in the figure. Thermal conductivities of the materials will vary as
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