The thermal diffusivities for solids are generally

Related MCQs

• The thermal diffusivities for gases are generally
• Fresh orange juice contains 12% (by weight) solids and the rest water 90% of the fresh juice is sent to an evaporator to remove water and subsequently mixed with the remaining 10% of fresh juice. The resultant product contains 40% solids. The kg of water removed from 1 kg fresh juice is
• An evaporator while concentrating an aqueous solution from 10 to 40% solids evaporates 30000 kg of water. The amount of solids handled by the system in kg is
• For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally
• Thermal conductivity of non-metallic amorphous solids with decrease in temperature
• With increase in temperature, the thermal conductivity of non-metallic amorphous solids
• At steady state the temperature variation in a plane wall, made of two different solids I & II is shown below: The thermal conductivity of material „I‟
• The thermal efficiency of a reversible heat engine operating between two given thermal reservoirs is 0.4. The device is used either as a refrigerator or as a heat pump between the same reservoirs. Then the coefficient of performance as a refrigerator (COP)R and the co-efficient of performance as a heat pump (COP)HP are
• The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K0 + at, where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be
• If thermal conductivity of aluminium is say 100 units at 0?C, the thermal conductivity at 500?C will be closer to