This set of tough Mass Transfer Questions & Answers focuses on “Moisture Concept of Drying”. 1. Find the moisture to be evaporated per kg of dried product if initial and final moisture content per kg of dry solid is 85% and 15%. a) 0.5 b) 0.6 c) 0.7 d) 0.8 2. Convert 80% of moisture … Read more
This set of tricky Mass Transfer Questions & Answers focuses on “Time period Calculation in Drying”. 1. Find the time taken to dry 50% to 40% of moisture (dry basis) if critical moisture content is 30%. If the weight of the wet solid is 5 kg and the product of area and the constant rate … Read more
This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Drying-Rate of Batch Drying”. 1. Direct dryers are ___________ a) Batch driers b) Continuous driers c) Semi-batch driers d) None of the mentioned 2. Cabinet/ Tray driers are direct driers. a) True b) False 3. For estimating the drier size it is … Read more
This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Extraction Equipments”. 1. __________ is the single stage device in extractor types. a) Mixer settler b) Sieve trays c) Agitator vessel d) Packed column 2. Settler in the mixer settler is applicable for rapid agitation. a) True b) False 3. The substance … Read more
This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Terinary Equilibrium Diagram”. 1. The extraction compositions in equilibrium are represented by equilateral triangle whose coordinates are known as a) Isobar b) Isotrope c) Isotherm d) None of the mentioned 2. Find LPM in the below one pair partially miscible ternary diagram. … Read more
This set of Advanced Mass Transfer Questions & Answers focuses on “Design of Extractor for Single Stage Operations”. 1. Stages in the extractor are _______________ a) Equilibrium stages b) Theoretical stages c) Equilibrium or theoretical stages d) None of the mentioned 2. Extraction includes mixing alone. a) True b) False 3. Every stage of extractor … Read more
This set of Basic Mass Transfer Questions & Answers focuses on “Solvent Selection for Unit Operations”. 1. For extraction, the distribution co-efficient should be greater that 1. a) True b) False 2. The viscosity should be high for the solvents using in extraction operation. a) True b) False 3. The Azeotropic composition of the solute … Read more
This set of Mass Transfer Problems focuses on “Extraction-Liquid Liquid Equilibria”. 1. Solvent extraction is basically known as a) Gas-liquid extraction b) Liquid- liquid extraction c) Liquid –solid extraction d) None of the mentioned 2. Liquid-liquid mixture is separated with solvent extraction by adding _______ solvent. a) Soluble b) Insoluble c) Partially soluble d) All … Read more
This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Distillation Types”. 1. In Azeotropic distillation __________ remains low. a) Heat b) Volatility c) Relative volatility d) None of the mentioned 2. Find the distillation preferred for the binary mixture having component A and B with vapour pressure 360mmHg and 355mmHg. a) … Read more
This set of Mass Transfer Multiple Choice Questions & Answers (MCQs) focuses on “Flash Vaporization Line (q-line)”. 1. At what feed condition the slope of q line is infinity? a) Saturated vapour b) Saturated liquid c) Superheated vapour d) None of the mentioned 2. Find the feed condition from the below distribution curve. a) Saturated … Read more
