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.
| 101. |
Statement 1: Packed towers are used for physical absorption.Statement 2: Agitated vessels are used for physical absorption. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» B. True, True | |
| 102. |
The existence of a thick constant film between two phases is a proposal by which of the following theories? |
| A. | Film theory |
| B. | Penetration theory |
| C. | Surface renewal theory |
| D. | All of the mentioned |
| Answer» B. Penetration theory | |
| 103. |
When q=(Heat required to convert one mole of feed to saturated vapor)/(Molar heat of vaporization of feed)Statement 1: q<1 means the slope is a horizontal line.Statement 2: q<1 means the slope is a vertical line. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 104. |
High residence time encourages _____ |
| A. | Attrition |
| B. | Crystal growth |
| C. | Attrition & Crystal growth |
| D. | None of the mentioned |
| Answer» B. Crystal growth | |
| 105. |
Tunnel dryer is only a continuous version of a cabinet tray dryer. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 106. |
Which of the following dryers requires non-sticky granular feed? |
| A. | Rotary dryer |
| B. | Fluidized bed dryer |
| C. | Rotary & Fluidized bed dryer |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 107. |
Which of the following is a major constraint of SCFE? |
| A. | Maintaining temperature of order 100° C |
| B. | Channeling of fluid in extraction tank without contacting the solids |
| C. | Maintenance of high pressure |
| D. | All of the mentioned |
| Answer» E. | |
| 108. |
Which of the following dryers cannot take a feed in the form of pastes/slurries/sticky items? |
| A. | Drum dryer |
| B. | Screw conveyor dryer |
| C. | Pneumatic dryer |
| D. | Spray dryer |
| Answer» D. Spray dryer | |
| 109. |
This method is used in food processing for removal of bad odours from food. |
| A. | Flash distillation |
| B. | Steam distillation |
| C. | Batch distillation |
| D. | Gas adsorption |
| Answer» C. Batch distillation | |
| 110. |
In a packaging of dry grapes, the packaging material is made of polyethylene. The dry grapes have certain moisture content. Which of the following is true with respect to the diffusion of certain amount of moisture through the packing? |
| A. | The moisture will not diffuse |
| B. | The diffusion in this case is called permeability |
| C. | None of the mentioned |
| D. | Neither of the mentioned |
| Answer» C. None of the mentioned | |
| 111. |
Which of the following filtration equipment operates under continuous operation? |
| A. | Plate and frame filter press |
| B. | Pressure leaf filter press |
| C. | Continuous Rotary Vacuum Filter Press |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 112. |
In re-fluxing, the re-flux ratio needs to a minimum. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 113. |
Statement 1: Rectification involves the liquid and vapors to pass a cascade of stages.Statement 2: In rectification, both heat and mass transfer takes place till equilibrium is reached. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 114. |
Which of the following is also called Oxygen balancing method? |
| A. | Dynamic gassing out method |
| B. | Static method |
| C. | Sulphite oxidation method |
| D. | None of the mentioned |
| Answer» C. Sulphite oxidation method | |
| 115. |
Statement 1: Concentration is a product of diffusivity and solubility.Statement 2: Permeability coefficient in case of food packaging can be written as product of partial pressure and solubility using Henry’s law. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 116. |
Which among the following factors does NOT affect extraction? |
| A. | Solubility of solute in the solvent |
| B. | Degree of agitation |
| C. | Concentration difference |
| D. | None of the mentioned |
| Answer» E. | |
| 117. |
Statement 1: In film theory, mass transfer coefficient is proportional to D¹/².Statement 2: Penetration theory states that all elements are exposed at the same time which is unrealistic. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 118. |
Raoult’s law is when mole fraction approaches zero and Henry’s law is applicable when concentration approaches zero. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 119. |
In making of cocoa butter via crystallization, liquid is the desired product. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 120. |
Statement 1: T-joints in pipelines for crystallization should be avoided as much as possible.Statement 2: Thin liquids should have a slope to drain off liquid. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 121. |
If the aperture size of the filtration medium is too small, it causes high pressure drops. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 122. |
If extraction is done at the _____ of the solvent, it is called _____ |
| A. | Melting point, decoction |
| B. | Boiling point, decoction |
| C. | Melting point, leaching |
| D. | Boiling point, leaching |
| Answer» C. Melting point, leaching | |
| 123. |
Liquid-liquid extraction is called leaching. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 124. |
To increase the solubility of carbon-di-oxide in coke, it is subjected to high pressure. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 125. |
Which of the following denotes gas phase mass transfer coefficient? |
| A. | Sherwood number |
| B. | Lewis number |
| C. | Schmidt number |
| D. | None of the mentioned |
| Answer» C. Schmidt number | |
| 126. |
What does the thin layer model of drying beds in drying of grains depend on? |
| A. | Temperature of air |
| B. | Air flow |
| C. | Initial moisture content |
| D. | All of the mentioned |
| Answer» E. | |
| 127. |
What is the effect of pressure drop on the filtration rate? |
| A. | Increases |
| B. | Deceases |
| C. | Varies depending on the compressibility |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 128. |
∫yₒʸᵇdy/(y-y*) gives you _____ |
| A. | Height of one transfer unit |
| B. | Height of the entire column |
| C. | Number of transfer units in the column |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 129. |
Statement 1: In counter-current extraction, equilibrium is reached at every stage.Statement 2: Right angled triangle method also called a difference point method is used to calculate the ideal number of stages for extraction. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 130. |
Statement 1: Batch crystallizers are used for jaggery.Statement 2: Particle size is controlled by stirring and scraping the concentrate from the vessel for better heat transfer. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 131. |
One disadvantage with backward feeding is that the feed gets very concentrated at the beginning few units itself and hence it’s difficult to feed it to the next evaporator unit. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 132. |
Statement 1: Batch crystallizers use the concept of cooling of hot solution/magma.Statement 2: Control of particle size is poor in a batch crystallizer. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 133. |
Statement 1: Cabinet tray dryers are used for storing grains.Statement 2: Cabinet tray dryers are used for low cost foods. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 134. |
When q=(Heat required to convert one mole of feed to saturated vapor)/(Molar heat of vaporization of feed)Statement 1: q<1 means the liquid is sub-cooled.Statement 2: q<0 means the liquid is super heated vapor. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» E. | |
| 135. |
Cabinet tray dryers are not very effective as they do not completely strip off the moisture content from the food item. Hence, they need to be combined with another dryer for effective results. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 136. |
Which of the following statements is correct with respect to gas absorption? |
| A. | Sufficient contact time plays an important role in absorption |
| B. | Adequate contact area plays an important role in absorption |
| C. | Contact time becomes irrelevant after equilibrium and only the interfacial area plays a crucial role |
| D. | All of the mentioned |
| Answer» E. | |
| 137. |
Plate evaporators are used in recovering aroma from fruit juices. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 138. |
Which of the following factors is a genuine criterion for the selection of a filter press? |
| A. | Equipment life |
| B. | Availability of floor area |
| C. | Chemical reactivity |
| D. | All of the mentioned |
| Answer» E. | |
| 139. |
In a rising film evaporator, the temperature difference need not be as high as that in a falling film evaporator. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 140. |
Statement 1: Scraped surface evaporators are used in the dairy industry.Statement 2: Plate evaporators can be used for viscous liquids. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 141. |
Statement 1: In a rising film evaporator, the feed can be very viscous.Statement 2: In a rising film evaporator, the feed cannot be heat sensitive. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 142. |
Industry A is low on budget and is used in the sugar industry. Industry B wants to invest in a good evaporator. They are needed for meat extracts. Which evaporators will you suggest for each of them? |
| A. | Forced circulation evaporator, forced circulation evaporator |
| B. | Rising film evaporator forced circulation evaporator |
| C. | Forced circulation evaporator, rising film evaporator |
| D. | Rising film evaporator, rising film evaporator |
| Answer» C. Forced circulation evaporator, rising film evaporator | |
| 143. |
Statement 1: Friction factor ‘f’ is an important factor in turbulent flow.Statement 2: ‘f’ is the ratio of shear stress (ϩw) to kinetic energy head ((ρv²)⁄2g). |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 144. |
Which of the following pumps is this pump- It has no rotating or reciprocating parts involved. No leakage. Air/gas used to impart energy. |
| A. | Piston pump |
| B. | Diaphragm pump |
| C. | Gear pump |
| D. | Air-lift pump |
| Answer» E. | |
| 145. |
Pipes are described in the form of _____ |
| A. | None of the mentioned |
| B. | Formation Number |
| C. | All of the mentioned |
| D. | Schedule Number |
| Answer» E. | |
| 146. |
Statement 1: Two pipes are joined using _____Statement 2: The sealing material between two pipes to be joined is called _____ |
| A. | Union Joint, Coupling |
| B. | Coupling, Gasket |
| C. | Coupling, Thread cuttings |
| D. | Thread cuttings, Gasket |
| Answer» C. Coupling, Thread cuttings | |
| 147. |
Statement 1: Non-Newtonian fluids have a linear relationship between shear stress and shear strain.Statement 2: Tubes are larger than pipes in diameter and have thicker walls. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» D. False, True | |
| 148. |
Statement 1: Duhring’s rule states that the ratio of temperatures at which two solutions have the same vapor pressure is constant.Statement 2: Duhring’s rule states that the boiling point of a solution is a linear function of the boiling point of pure water at the same pressure. |
| A. | True, False |
| B. | True, True |
| C. | False, False |
| D. | False, True |
| Answer» C. False, False | |
| 149. |
Which of the following is true while concentrating jams? |
| A. | They’re sensitive to heat |
| B. | Evaporation process for jams is carried out under vacuum |
| C. | At vacuum, the boiling point decreases |
| D. | All of the mentioned |
| Answer» E. | |
| 150. |
During evaporation of edible solutions, the BPR-boiling point rise should be _____ and the foaming and scale formation should be _____ |
| A. | Low, minimum |
| B. | High, maximum |
| C. | Low, maximum |
| D. | High, minimum |
| Answer» B. High, maximum | |