MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 193 Mcqs, each offering curated multiple-choice questions to sharpen your Food Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Statement 1: Resistance is inversely proportional to the inter-facial area.Statement 2: The inter-facial area of a body is the area of the dispersed phase in a unit volume of the vessel. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 2. |
How does the solubility of carbon-di-oxide in coke increase when it is subjected to high pressure? |
| A. | Interfacial area increases |
| B. | Pressure drop decreases |
| C. | It shifts the equilibrium to a higher side |
| D. | All of the mentioned |
| Answer» D. All of the mentioned | |
| 3. |
Statement 1: Diffusion of gas component through the resistive film to the bulk of the liquid is the rate determining step.Statement 2: Diffusion of gas component through the gas-liquid inter-phase is the rate determining step. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 4. |
The EMC-RH data is fitted to Henderson’s equation. Which of the following is true about the relative humidity with respect to food technology terminology? |
| A. | It is also called water activity |
| B. | It is irrelevant with respect to food technology |
| C. | None of the mentioned |
| D. | All of the mentioned |
| Answer» B. It is irrelevant with respect to food technology | |
| 5. |
A major reason as to why evaporators and their selection for different applications in the food industry is very important is because ______ |
| A. | Organoleptic characteristics of food is very important |
| B. | Many food items are heat sensitive |
| C. | Majority of them have high moisture content |
| D. | All of the mentioned reasons |
| Answer» E. | |
| 6. |
Statement 1: Penetration theory states that mass transfer coefficient is directly proportional to diffusivity coefficient which was later proved wrong.Statement 2: Penetration theory states that mass transfer is based on unsteady mass transfer. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 7. |
When there is a mixture of liquids present, the boiling point lies between the boiling points of both the components. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 8. |
The point where the constant drying period changes to falling rate period is called _____ |
| A. | Equilibrium moisture content |
| B. | Critical moisture content |
| C. | Critical humidity |
| D. | Bound moisture content |
| Answer» C. Critical humidity | |
| 9. |
Which of the following needs to be taken care of during scale up of crystallizers? |
| A. | Reynolds number |
| B. | Residence time |
| C. | Power supplied to agitator per unit volume |
| D. | All of the mentioned |
| Answer» E. | |
| 10. |
The ratio of concentration of a super saturated solution to a saturated solution is denoted by α’ which is stated by the Kelvin equation. How is it related to the crystal size and interfacial tension between solid and liquid? |
| A. | Directly, indirectly |
| B. | Indirectly, directly |
| C. | Directly, directly |
| D. | Indirectly, indirectly |
| Answer» C. Directly, directly | |
| 11. |
Statement 1: Vapour-liquid-Equilibria is related to by a simple expression of Raoult’s law.Statement 2: Raoult’s law is applicable to real gases. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 12. |
Which of the following is not a measuring technique of KLa? |
| A. | Dynamic gassing out method |
| B. | Static method |
| C. | Sulphite oxidation method |
| D. | None of the mentioned |
| Answer» E. | |
| 13. |
What does excess supersaturating followed by cooling lead to? |
| A. | Primary nucleation |
| B. | Secondary nucleation |
| C. | Both, nucleation and crystal growth in general |
| D. | None of the mentioned |
| Answer» B. Secondary nucleation | |
| 14. |
Desolventization which is done in certain evaporators is more similar to distillation than evaporation. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 15. |
In flashing of jams, the temperature of concentrated jam _____ on flashing. Also, the vapor pressure of the concentrated jam _____ |
| A. | Decreases, sustains combustion |
| B. | Increases, sustains combustion |
| C. | Decreases, does NOT sustain combustion |
| D. | Increases, does NOT sustain combustion |
| Answer» B. Increases, sustains combustion | |
| 16. |
Which of the following is also called a ring dryer? |
| A. | Pneumatic conveyor dryer |
| B. | Drum dryer |
| C. | Freeze dryer |
| D. | Spray dryer |
| Answer» B. Drum dryer | |
| 17. |
Agitator vessels are taller than bubble columns. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 18. |
Excess nucleation leads to _____ |
| A. | Non-uniform CSD |
| B. | In huge capacity vessels, the crystal-crystal attrition leads to formation of small size particles hence no crystallization |
| C. | Non-uniform CSD, in huge capacity vessels, the crystal-crystal attrition leads to formation of small size particles hence no crystallization |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 19. |
Statement 1: Presence of certain organic solvents in solvent extraction can prove to be carcinogenic.Statement 2: CO₂ gas can be used in super critical fluid extraction. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 20. |
Multi-stage counter-current extraction is expensive as more extractors are needed to strip the solid off the solvent. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 21. |
Statement 1: A phase boundary exists between alcohol and oxygen.Statement 2: Phase boundary varies with agitation. It is inversely proportional to the amount of agitation provided. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 22. |
Statement 1: Crystallization is both a mass and heat transfer operation.Statement 2: The crystals and mother liquor obtained from a crystallizer are called _____ |
| A. | True, nucleation |
| B. | False, solid residue |
| C. | True, magma |
| D. | False, crystal growth |
| Answer» D. False, crystal growth | |
| 23. |
Statement 1: Boiling point concentration diagram plots y against x. (Mole fraction in gas and liquid phase respectively).Statement 2: VLE curve plots y against x. (Mole fraction in gas and liquid phase respectively). |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 24. |
Sherwood number is _____ |
| A. | Product of schmidst and grashof number |
| B. | Total mass transferred by mass transferred due to molecular diffusion |
| C. | Product of schmidst and reynold number |
| D. | None of the mentioned |
| Answer» C. Product of schmidst and reynold number | |
| 25. |
Statement 1: Soya bean has a high oil content.Statement 2: If the oil content is high, extraction is done by solvent extraction alone. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 26. |
Statement 1: Vapor phase is always more of volatile components.Statement 2: Liquid phase is always more of high boiling point liquids. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 27. |
Which of the following is the real extraction application of SCFE? |
| A. | Cholesterol from egg |
| B. | Nicotine from tobacco |
| C. | Cholesterol from egg & Nicotine from tobacco |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 28. |
Statement 1: Batch crystallizers are used if the throughput is high.Statement 2: The operating cost of batch crystallizers is high. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 29. |
Statement 1: Drying is used for preservation of food.Statement 2: Convective drying is indirect drying and conductive drying is direct drying. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 30. |
Coffee powders can be made from which of the following dryers? |
| A. | Pneumatic conveyor dryer |
| B. | Drum dryer |
| C. | Freeze dryer |
| D. | Spray dryer |
| Answer» E. | |
| 31. |
Rayleigh number is _____ |
| A. | Product of schmidst and grashof number |
| B. | Total mass transferred by mass transferred due to molecular diffusion |
| C. | Product of schmidst and reynold number |
| D. | None of the mentioned |
| Answer» B. Total mass transferred by mass transferred due to molecular diffusion | |
| 32. |
Hannah ordered one ton of mushrooms. But, the entire lot was brown. Which dryer could it possibly have been? |
| A. | Bin dryer |
| B. | Tray dryer |
| C. | Tower Dryer |
| D. | Vacuum dryer |
| Answer» C. Tower Dryer | |
| 33. |
Scraped surface crystallizers can be used for viscous fluids up to 10000 cp. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 34. |
_____ gives the relationship between the concentration of gas entering stage n and concentration of liquid leaving stage n. |
| A. | Equilibrium curve |
| B. | Operating line |
| C. | Equilibrium line |
| D. | None of the mentioned |
| Answer» C. Equilibrium line | |
| 35. |
Oil seed cakes are obtained by _____ |
| A. | Solvent extraction |
| B. | Mechanical pressing |
| C. | None of the mentioned |
| D. | Solvent extraction & Mechanical pressing |
| Answer» C. None of the mentioned | |
| 36. |
Statement 1: Distillation is not used very widely in the food industry.Statement 2: Steam distillation can be done when the volatile component is not miscible in water. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 37. |
Which of the following filtration equipment offers maximum pressure drop? |
| A. | Plate and frame filter press |
| B. | Pressure leaf filter press |
| C. | Continuous Rotary Vacuum Filter Press |
| D. | None of the mentioned |
| Answer» C. Continuous Rotary Vacuum Filter Press | |
| 38. |
A multi stage continuous counter-current extractor has the advantages of both co and counter current processes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 39. |
Advantage of turbo dryer over cabinet tray dryer is _____ |
| A. | It is more effective |
| B. | The feed is uniformly heated at the edges |
| C. | None of the mentioned |
| D. | It is more effective & the feed is uniformly heated at the edges |
| Answer» C. None of the mentioned | |
| 40. |
Statement 1: Batch distillation is used for small capacity operations.Statement 2: In food processing, batch distillation is used for desolventization. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 41. |
Which of the following is true about scraped surface crystallizers? |
| A. | Expansion of capacity is easy |
| B. | Can be used for a wide range of temperature differences |
| C. | Smaller size, less installation cost |
| D. | All of the mentioned |
| Answer» E. | |
| 42. |
Advantage of Draft tube baffles crystallizer _____ |
| A. | Re-circulation of a small fraction of mother liquor |
| B. | Selectively separates big particles from the smaller ones |
| C. | All of the mentioned |
| D. | None of the mentioned |
| Answer» C. All of the mentioned | |
| 43. |
Which of the following is the actual reason why CO₂ is used in CSFE? |
| A. | All of the mentioned |
| B. | No serious health risks detected so far |
| C. | Inexpensive and readily available in pure form |
| D. | Inert, doesn’t react with solute |
| Answer» B. No serious health risks detected so far | |
| 44. |
Statement 1: Filter cake increases the efficiency of filtration.Statement 2: Filter aid is added to the filter cake when the filter cake is the desired product. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 45. |
When the mass balance in a distillation column is F = B + D, how can D that is the distillate be increased? |
| A. | Decreasing vacuum in distillation unit |
| B. | Increase vacuum in distillation unit |
| C. | None of the mentioned |
| D. | Increasing & Decreasing vacuum in distillation unit |
| Answer» C. None of the mentioned | |
| 46. |
Statement 1: KLa is measured together and not separately. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 47. |
After extraction via solvent extraction, the cake serves to be a good source of _____ |
| A. | Fats |
| B. | Proteins |
| C. | Carbohydrates |
| D. | Fibers |
| Answer» C. Carbohydrates | |
| 48. |
Statement 1: Vibro-fluidized bed dryer can reduce the air flow rate consumptions as air is only used for drying and not for fluidizing.Statement 2: _____ are often called desolventizers. |
| A. | True, screw conveyor |
| B. | True, pneumatic conveyor |
| C. | False, screw conveyor |
| D. | False, pneumatic conveyor |
| Answer» B. True, pneumatic conveyor | |
| 49. |
Statement 1: Multi-stage cross-current extraction – the solids contain some amount of solute after every extraction.Statement 2: Single-stage batch extractor – Used in labs and not on large scale as a solvent is continuously subjected to heat. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 50. |
After incipient fluidization, the pressure briefly _____ |
| A. | Increases |
| B. | Decreases |
| C. | Stays constant |
| D. | Varies exponentially |
| Answer» C. Stays constant | |