Heat Transfer For concentrating an aqueous solution of a material like anhydrous Na₂SO₄, whose solubility decreases with rise in temperature, the most suitable evaporator is a __________ evaporator. High pressure None of these Backward feed Vacuum High pressure None of these Backward feed Vacuum ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer The Stefan-Boltzman constant depends on the Temperature Surface None of these Medium Temperature Surface None of these Medium ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer A backward feed multiple effect evaporator is better than forward feed for concentrating cold feed, because it provides Higher economy Lower economy Lower capacity Both A & B Higher economy Lower economy Lower capacity Both A & B ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Increasing the liquor level in the evaporator results in the decreased capacity decreased effect of hydrostatic head increased true temperature drop increase in liquor film co-efficient decreased capacity decreased effect of hydrostatic head increased true temperature drop increase in liquor film co-efficient ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer In a co-current double pipe heat exchanger used for condensing saturated steam over the inner tube, if the entrance and exit conditions of the coolant are interchanged, then the rate of condensation will Remain unchanged Either increase or decrease; depends on the coolant flow rate Decrease Increase Remain unchanged Either increase or decrease; depends on the coolant flow rate Decrease Increase ANSWER DOWNLOAD EXAMIANS APP
Heat Transfer Thermal diffusivity of a material Has the unit m² /sec All of these Is the ratio of thermal conductivity to thermal capacity Is defined as K/ρ . Cp Has the unit m² /sec All of these Is the ratio of thermal conductivity to thermal capacity Is defined as K/ρ . Cp ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS