Chemical Engineering :: Chemical Engineering Basics
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A material expanding freely due to heating will develop __________ stress.
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A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.
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More than 1000 tons refrigeration capacity plants are usually of __________ type.
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Pick out the wrong statement.
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The increase in hardness of metal due to its cold working is termed as the __________ hardening.
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The maximum axial compression stress during cold upsetting of a cylinderical rod of radius (r) occurs at
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Electrode potential is not concerned with the measurment of
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__________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction.
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Tungsten in high speed steel is responsible for its
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A.
In a thin spherical shell under internal pressure, hoop stress is equal to the half of axial stress.
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B.
Thermoplastic material does not follow Hooke's law of elasticity.
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C.
Components under longitudinal compression is called 'struts' and the load under which strut fails is called crippling or buckling load.
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D.
At low temperatures (sub-zero) in pressure vessels, the ductility of metal diminishes and brittle fracture occurs while at high temperature in pressure vessels, embrittlement of material may take place.
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