MCQOPTIONS
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MCQOPTIONS
This section includes 270 Mcqs, each offering curated multiple-choice questions to sharpen your Dairy Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
If the product flow rate in a plant is to be increased from 10,000 l/h to 20,000 l/h, the heat exchanger must be extended to_______ the original size, provided the flow rates of the service media are also doubled, other factors being constant. |
| A. | Double |
| B. | Triple |
| C. | Same |
| D. | Quadruple |
| Answer» B. Triple | |
| 202. |
“A roof accumulates solar heat during the day and radiates the heat at night” is an example of which of the following way of heat transfer? |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Filtration |
| Answer» D. Filtration | |
| 203. |
Preferred Homogenization pressure is _______ |
| A. | 5- 15 MPa |
| B. | 10-25 MPa |
| C. | 25- 50 MPa |
| D. | 60-70 MPa |
| Answer» C. 25- 50 MPa | |
| 204. |
Rate of evaporation is______ |
| A. | directly proportional to temperature of liquid |
| B. | inversely proportional to temperature of liquid |
| C. | independent of temperature of liquid |
| D. | directly proportional to humidity of surrounding air |
| Answer» B. inversely proportional to temperature of liquid | |
| 205. |
Evaporation in dairy industry is a preliminary step to which of the following process? |
| A. | Drying |
| B. | Flavoring |
| C. | Watering |
| D. | Pasteurization |
| Answer» B. Flavoring | |
| 206. |
Which of the following does not denotes the flavor profile of homogenized milk? |
| A. | Richer than unhomogenized milk |
| B. | Smoother than unhomogenized milk |
| C. | Creamier than unhomogenized milk |
| D. | Bitter |
| Answer» E. | |
| 207. |
The volute pumps and vortex volute pumps are __________ pumps with _________ shaft. |
| A. | Multistage, horizontal |
| B. | Multistage, vertical |
| C. | Single stage, horizontal |
| D. | Single stage, vertical |
| Answer» D. Single stage, vertical | |
| 208. |
Which of the following is an effective way of purifying liquids containing suspensions? |
| A. | crystallization |
| B. | decanting |
| C. | centrifuging |
| D. | separating funnel |
| Answer» D. separating funnel | |
| 209. |
Main function of first stage of homogenization is? |
| A. | Fat globule reduction |
| B. | Separation of clusters of fat into individual fat molecules |
| C. | Oxidation |
| D. | Off flavor development |
| Answer» B. Separation of clusters of fat into individual fat molecules | |
| 210. |
Which of the following is the effect of homogenization on the appearance of milk? |
| A. | Dusty appearance |
| B. | Yellowish appearance |
| C. | Whitish appearance |
| D. | Blackish appearance |
| Answer» D. Blackish appearance | |
| 211. |
Chlorines, acids, and bases are three types of chemicals used to do which of the following? |
| A. | prescreen the water in the membrane filtration system |
| B. | chemically clean a membrane filtration system |
| C. | monitor a membrane filtration system for fiber failure |
| D. | filter |
| Answer» C. monitor a membrane filtration system for fiber failure | |
| 212. |
Which one of the following is the name of the process of reversing the direction of water flow through the filter using filtered water? |
| A. | back pulse |
| B. | reverse flow |
| C. | air pressure |
| D. | front pressure |
| Answer» C. air pressure | |
| 213. |
_________ is a modification of ultra filtration in which water is added to the feed as filtration proceeds in order to wash out feed components which will pass through the membranes, basically lactose and minerals. |
| A. | Permeate |
| B. | Retentate |
| C. | Concentration factor |
| D. | Diafilteration |
| Answer» D. Diafilteration | |
| 214. |
Which material is used for pipes which conduct waste? |
| A. | Stainless steel |
| B. | Copper |
| C. | Ceramic |
| D. | Plastic |
| Answer» D. Plastic | |
| 215. |
Which of the following membrane separation technique would be most suitable for dehydration of whey in dairy industry? |
| A. | Reverse osmosis |
| B. | Nano filtration |
| C. | Ultra filtration |
| D. | Membrane filtration |
| Answer» B. Nano filtration | |
| 216. |
Fat is added back to skim milk in the process of standardization. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 217. |
Plate heat exchanger was patented in which year? |
| A. | 1890 |
| B. | 1990 |
| C. | 2009 |
| D. | 1790 |
| Answer» B. 1990 | |
| 218. |
How soon before the show should an exhibitor begin fitting and training animals? |
| A. | 5months |
| B. | 2 months |
| C. | 1 year |
| D. | 8months |
| Answer» C. 1 year | |
| 219. |
Scraped Heat exchanger has a ______ design. |
| A. | Simple |
| B. | Vertical |
| C. | Planar |
| D. | Horizontal |
| Answer» B. Vertical | |
| 220. |
Heat exchanger characterized by pack of stainless steel in a frame is ________ |
| A. | Plate heat exchanger |
| B. | Tubular heat exchanger |
| C. | Scraped surface heat exchanger |
| D. | Spray dryer |
| Answer» B. Tubular heat exchanger | |
| 221. |
Heat must be supplied to a substance in order to increase its temperature by 1°C is called? |
| A. | Plate heat |
| B. | Specific heat |
| C. | Heat of chemical reaction |
| D. | Heat of crystallization |
| Answer» C. Heat of chemical reaction | |
| 222. |
The unwanted buildup of material on a surface is called? |
| A. | Secretion |
| B. | Plating |
| C. | Fouling |
| D. | Layering |
| Answer» D. Layering | |
| 223. |
Compounds evaporating easily and giving off a smell are? |
| A. | ionic compounds |
| B. | covalent bonds |
| C. | metallic bonds |
| D. | dative bonds |
| Answer» C. metallic bonds | |
| 224. |
How should all movements and positioning of a dairy animal and her feet be accomplished? |
| A. | halter command |
| B. | feet pushing |
| C. | body pushing |
| D. | hand pushing |
| Answer» B. feet pushing | |
| 225. |
What hormone is important in the milking process? |
| A. | Oxytocin |
| B. | Thryoxine |
| C. | Tri-iodothyronine |
| D. | Parathyroid hormone |
| Answer» B. Thryoxine | |
| 226. |
Which direction should the show person walk in relation to the cow? |
| A. | forward |
| B. | parallel |
| C. | backward |
| D. | front |
| Answer» D. front | |
| 227. |
Rate of evaporation increases as? |
| A. | exposed surface area of liquid increases |
| B. | exposed surface area of liquid decreases |
| C. | movement of air above surface of liquid decreases |
| D. | atmospheric pressure increases |
| Answer» C. movement of air above surface of liquid decreases | |
| 228. |
Pore size RO membrane ranges from _____________ |
| A. | 0.1- 5µm |
| B. | 0.1- 0.01µm |
| C. | 0.001- 0.01µm |
| D. | 0.0001- 0.001µm |
| Answer» D. 0.0001- 0.001µm | |
| 229. |
After centrifugation, sublimate ______ |
| A. | dissolves completely |
| B. | remain suspended in a liquid |
| C. | settles at bottom |
| D. | depends upon pH of sublimate |
| Answer» D. depends upon pH of sublimate | |
| 230. |
Tank which aid in keeping product at same level is called _______ |
| A. | Process tank |
| B. | Mixing tank |
| C. | Balance tank |
| D. | Storage tank |
| Answer» D. Storage tank | |
| 231. |
Most widely used sanitary pumps in the dairy industry are? |
| A. | Centrifugal pump |
| B. | Liquid ring pump |
| C. | Positive displacement pump |
| D. | Suction pump |
| Answer» B. Liquid ring pump | |
| 232. |
Valves with constant outlet pressure are used after which of the following machines? |
| A. | Separator |
| B. | Pasteurizer |
| C. | Homogenizer |
| D. | Filling machine |
| Answer» E. | |
| 233. |
Which of the following is not the reason for the concentration of food liquids? |
| A. | reduce the cost of drying |
| B. | induce crystallization |
| C. | reduce costs for storage and transportation |
| D. | increase water activity in order to increase microbiological and chemical |
| Answer» E. | |
| 234. |
What is the name of the machine that spins in order to separate out components making up a mixture? |
| A. | Centrifuge |
| B. | Blood plasma |
| C. | Centrifugation |
| D. | Centrifugation tube |
| Answer» D. Centrifugation tube | |
| 235. |
Which of the following material is used for heat transfer in the dairy industry? |
| A. | Iron |
| B. | Platinum |
| C. | Copper |
| D. | Stainless steel |
| Answer» E. | |
| 236. |
The rate of buildup of fouling does not depend on which of the following? |
| A. | Milk quality and Air content of the product |
| B. | Temperature difference between product and heating medium |
| C. | Pressure conditions in the heating section |
| D. | Thickness of stainless steel |
| Answer» E. | |
| 237. |
What are the two methods calves can acquire protection against disease?I. Passive immunity from absorption of antibodies found in first milk colostrumsII. active immunity in which the calf manufactures its own antibodies |
| A. | I only |
| B. | None |
| C. | II only |
| D. | I and II |
| Answer» E. | |
| 238. |
Which of the following membrane separation technique would be most suitable for partial desalination of whey in dairy industry? |
| A. | Reverse osmosis |
| B. | Nano filtration |
| C. | Ultra filtration |
| D. | Membrane filtration |
| Answer» C. Ultra filtration | |
| 239. |
Discharge capacity of the reciprocating pump is __________ that of the centrifugal pump. |
| A. | Higher than |
| B. | Lower than |
| C. | Same as |
| D. | Unpredictable |
| Answer» C. Same as | |
| 240. |
Which of the following is/are the category of Tubular Heat exchanger? |
| A. | Multi/mono channel |
| B. | Multi/mono tube |
| C. | Cubical channel |
| D. | Multi/mono channel and Multi/mono tube |
| Answer» E. | |
| 241. |
After centrifugation of milk, the supernatant is? |
| A. | Fat |
| B. | Whey |
| C. | Casein |
| D. | Water |
| Answer» C. Casein | |
| 242. |
Which heat exchanger used for heating and cooling viscous, sticky and lumpy products? |
| A. | Plate heat exchanger |
| B. | Tubular heat exchanger |
| C. | Scraped surface heat exchanger |
| D. | Spray dryer |
| Answer» D. Spray dryer | |
| 243. |
PHE (Plate Heat Exchanger) is more efficient in terms of heat transfer than THE (Tubular Heat Exchanger). |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 244. |
What is the method of using the heat of a hot liquid, such as pasteurized milk, to preheat cold incoming milk? |
| A. | Heating |
| B. | Cooling |
| C. | Regeneration |
| D. | Standardization |
| Answer» D. Standardization | |
| 245. |
Evaporation of solution of CuSO₄ helps in? |
| A. | making it concentrated |
| B. | crystallization of CuSO₄ |
| C. | evaporation of salt CuSO₄ |
| D. | concentration and crystallization |
| Answer» E. | |
| 246. |
Zigzag tube in heat treatment is used for which purpose? |
| A. | Fouling |
| B. | Standardization |
| C. | Holding for a long holding time |
| D. | Discard |
| Answer» D. Discard | |
| 247. |
What breed of the dairy cow was first raised on the Island of Guernsey in the English Channel? |
| A. | Guernsey |
| B. | Holstein |
| C. | Jersey |
| D. | Brown Swiss |
| Answer» B. Holstein | |
| 248. |
In dairy cattle what is the mother called? |
| A. | Sam |
| B. | Ram |
| C. | Dam |
| D. | Tam |
| Answer» D. Tam | |
| 249. |
Fine insoluble solid particles can be removed through which of the following process? |
| A. | crystallization |
| B. | decanting |
| C. | centrifuging |
| D. | separating funnel |
| Answer» D. separating funnel | |
| 250. |
Which of the following standardization is more desirable in large-scale operation? |
| A. | Continuous |
| B. | Batch |
| C. | No standardization |
| D. | Centrifugation |
| Answer» B. Batch | |