1. : The process of reducing particle size of grains into flour is called?
(A) Extraction
(B) Milling
(C) Extrusion
(D) Drying
2. : The separation of solid particles from a liquid using centrifugal force is known as?
(A) Sedimentation
(B) Centrifugation
(C) Filtration
(D) Screening
3. : The removal of moisture from agricultural products under controlled conditions is called?
(A) Concentration
(B) Drying
(C) Blanching
(D) Evaporation
4. : The unit operation of separating lighter particles from heavier ones by air stream is called?
(A) Sieving
(B) Winnowing
(C) Sorting
(D) Mixing
5. : The process of separating particles based on size using perforated screens is?
(A) Filtration
(B) Grading
(C) Sieving
(D) Cleaning
6. : Heat transfer without movement of particles is called?
(A) Radiation
(B) Conduction
(C) Convection
(D) Evaporation
7. : Which equipment is commonly used for size reduction in feed mills?
(A) Spray dryer
(B) Hammer mill
(C) Extruder
(D) Pasteurizer
8. : The process of separating cream from milk is an example of?
(A) Sedimentation
(B) Filtration
(C) Centrifugation
(D) Distillation
9. : The operation used to remove stones from grains is called?
(A) De-stoning
(B) Sorting
(C) Grading
(D) Cleaning
10. : The conversion of liquid into vapor at its boiling point is?
(A) Drying
(B) Condensation
(C) Evaporation
(D) Freezing
11. : The principle of filtration is based on?
(A) Size exclusion
(B) Density difference
(C) Temperature difference
(D) Pressure gradient only
12. : Which of the following is a unit operation for concentration of fruit juice?
(A) Blanching
(B) Evaporation
(C) Fermentation
(D) Grinding
13. : The drying of liquid foods like milk into powder form is commonly done by?
(A) Tunnel drying
(B) Spray drying
(C) Sun drying
(D) Freeze drying
14. : The separation of components of a liquid mixture by differences in boiling points is called?
(A) Distillation
(B) Filtration
(C) Extraction
(D) Crystallization
15. : The process of heating foods at a temperature below boiling point for preservation is?
(A) Sterilization
(B) Pasteurization
(C) Blanching
(D) Evaporation
16. : Freezing of foods is an example of which type of unit operation?
(A) Mass transfer
(B) Heat transfer
(C) Size reduction
(D) Mechanical separation
17. : The separation of bran from flour during milling is called?
(A) Extraction
(B) Sieving
(C) Purification
(D) Sifting
18. : The equipment used for separation of immiscible liquids is called?
(A) Evaporator
(B) Clarifier
(C) Centrifuge
(D) Spray dryer
19. : The unit operation involving movement of fluids due to density difference caused by temperature variation is?
(A) Radiation
(B) Convection
(C) Conduction
(D) Filtration
20. : Which operation is used to extend the shelf life of perishable commodities by lowering temperature?
(A) Refrigeration
(B) Blanching
(C) Milling
(D) Evaporation
21. : Crystallization is mainly used in agricultural processing for production of?
(A) Edible oils
(B) Fruit juice
(C) Sugar
(D) Wheat flour
22. : The operation of separating dust and light impurities from grains using air is?
(A) Screening
(B) Winnowing
(C) Cleaning
(D) Sorting
23. : Which of the following is a mass transfer operation?
(A) Freezing
(B) Evaporation
(C) Blanching
(D) Pasteurization
24. : The main unit operation in oil extraction from seeds is?
(A) Distillation
(B) Pressing/Expelling
(C) Fermentation
(D) Sieving
25. : The principle of sedimentation is based on?
(A) Particle size
(B) Density difference
(C) Temperature difference
(D) Viscosity only