Heat Transfer Vacuum is generally maintained in the vapour space of an evaporator mainly to Achieve very high concentration of the final product Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam Concentrate heat sensitive materials Achieve very high concentration of the final product Facilitate forward feeding in multiple effect evaporation Get economical temperature difference by using moderate pressure steam Concentrate heat sensitive materials ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer An insulator should have Less resistance to heat flow Low thermal conductivity High thermal conductivity A porous structure Less resistance to heat flow Low thermal conductivity High thermal conductivity A porous structure ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Rate of heat transfer by vaporisation from pools of water is affected by the Nature of heating surface and distribution of bubbles All of these Surface tension of water Viscosity of water Nature of heating surface and distribution of bubbles All of these Surface tension of water Viscosity of water ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer For a multipass shell and tube heat exchanger, the LMTD correction factor is always Between 1 & 2 > 1 < 1 1 Between 1 & 2 > 1 < 1 1 ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The energy radiated from a surface Q at absolute temperature T is related as None of these Q ∝ T³ Q ∝ T² Q ∝ T⁴ None of these Q ∝ T³ Q ∝ T² Q ∝ T⁴ ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Critical value of the __________ number governs the transition from laminar to turbulent flow in free convection heat transfer. Reynolds Grashoff Prandtl & Grashoff Both A & B Reynolds Grashoff Prandtl & Grashoff Both A & B ANSWER DOWNLOAD EXAMIANS APP
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