Heat Transfer Which of the following is the most widely used heat insulating material for pipelines carrying steam? Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos 85% magnesia cement and glass wool Cotton followed by aluminium foil Fireclay refractory followed by aluminium sheet Tar dolomite bricks followed by asbestos 85% magnesia cement and glass wool ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer When vaporisation takes place directly at the heating surface, it is called film boiling all of the listed here vapour binding nucleate boiling film boiling all of the listed here vapour binding nucleate boiling ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following is not concerned with the heat transfer? Schmidt number Brinkman number Stanton number Peclet number Schmidt number Brinkman number Stanton number Peclet number ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Which of the following has the lowest Prandtl number? Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Water Transformer oil Molten sodium (a coolant used in fast breeder reactor) Dilute H₂SO₄ Water Transformer oil ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Heat transfer co-efficient (h1) for liquids increases with Increasing temperature None of these Decreasing Reynolds number Decreasing temperature Increasing temperature None of these Decreasing Reynolds number Decreasing temperature ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Asymptotic conditions is reached, when for a fluid flowing in laminar flow through a long tube Exit fluid temperature < wall temperature Exit fluid temperature = wall temperature Exit-fluid temperature > wall temperature Graetz number > 100 Exit fluid temperature < wall temperature Exit fluid temperature = wall temperature Exit-fluid temperature > wall temperature Graetz number > 100 ANSWER DOWNLOAD EXAMIANS APP
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