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.
| 151. |
What is another name for Vitamin C? |
| A. | tartaric acid |
| B. | ascorbic acid |
| C. | tannins |
| D. | malic acid |
| Answer» C. tannins | |
| 152. |
Factors that lead to excess air in milk are? |
| A. | Gravity and temperature |
| B. | Temperature and atmospheric pressure |
| C. | Temperature and volume |
| D. | Volume and pressure |
| Answer» C. Temperature and volume | |
| 153. |
Which material is used for pipes which conduct water and air? |
| A. | Stainless steel |
| B. | Copper |
| C. | Ceramic |
| D. | Plastic |
| Answer» C. Ceramic | |
| 154. |
What is the oxygen content of commercial mixed raw milk? |
| A. | 0.47% |
| B. | 1.29% |
| C. | 4.45% |
| D. | 6.21% |
| Answer» B. 1.29% | |
| 155. |
The number and size of silo tanks depend on which of the following?I) Milk intake per dayII) Number of days per working weekIII) Number of hours per working weekIV) Types of product manufactured |
| A. | I) and II) |
| B. | II) and III) |
| C. | III) and IV) |
| D. | I), II), III) and IV) |
| Answer» E. | |
| 156. |
Which of the following pump suitable for handling AMF in the dairy industry? |
| A. | Centrifugal pump |
| B. | Liquid ring pump |
| C. | Diaphragm pump |
| D. | Peristaltic pumps |
| Answer» E. | |
| 157. |
When heating begins in miscible solutions, vapors formed will be? |
| A. | of liquid lower in boiling point |
| B. | of liquid higher in boiling point |
| C. | vapors will be of both liquids with a higher concentration of liquid having low boiling point |
| D. | collected in a gas syringe |
| Answer» D. collected in a gas syringe | |
| 158. |
How many months prior to breeding a heifer should both leptospirosis and vibriosis vaccinations be given? |
| A. | 1-2 prior to breeding |
| B. | 3-4 prior to breeding |
| C. | 4-5 prior to breeding |
| D. | 6-7 prior to breeding |
| Answer» B. 3-4 prior to breeding | |
| 159. |
What nutrient acts as a lubricant and regulates body heat? |
| A. | Vitamin A |
| B. | Protein |
| C. | Water |
| D. | Minerals |
| Answer» D. Minerals | |
| 160. |
What is the most common of all dairy foods? |
| A. | Butter |
| B. | Curd |
| C. | Cheese |
| D. | Milk |
| Answer» E. | |
| 161. |
Differential centrifugation relies on the differences in ______ of biological particles of different ___________ |
| A. | Size, density |
| B. | Sedimentation rate, sizes and density |
| C. | Size, structure |
| D. | Mass, size |
| Answer» C. Size, structure | |
| 162. |
Which of the factor does not affect the precision in standardization process? |
| A. | Fluctuations in the fat content of the incoming milk |
| B. | Fluctuations in throughput |
| C. | Fluctuations in preheating temperature |
| D. | Fluctuation in protein content |
| Answer» E. | |
| 163. |
Which of the following method is used in a standardization of milk? |
| A. | Pearson square method |
| B. | Donald method |
| C. | Jake method |
| D. | Pearson cube method |
| Answer» B. Donald method | |
| 164. |
The pressure in the skim milk outlet must be kept _______ in order to enable accurate standardization. |
| A. | High |
| B. | Low |
| C. | Constant |
| D. | Steep |
| Answer» D. Steep | |
| 165. |
Which of the following is the time-temperature combination for Sterilization? |
| A. | 72°C to 74°C for 15 to 20 seconds |
| B. | 135°C to 140°C for 2 to 4 seconds |
| C. | 63°C for 30 minutes |
| D. | 115 – 120°C for some 20 – 30 minutes |
| Answer» E. | |
| 166. |
The cream fat content is _______ to the flow rate. |
| A. | Inversely proportional |
| B. | Directly proportional |
| C. | Neither inversely proportional nor directly proportional |
| D. | Increased |
| Answer» B. Directly proportional | |
| 167. |
“Heat transferred from the bowl of the spoon to the handle” is an example of which of the following way of heat transfer? |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Filtration |
| Answer» B. Convection | |
| 168. |
Which of the following is the time-temperature combination for Thermization? |
| A. | 72°C to 74°C for 15 to 20 seconds |
| B. | 135°C to 140°C for 2 to 4 seconds |
| C. | 63°C for 30 minutes |
| D. | 57°C to 68°C for 15 min |
| Answer» E. | |
| 169. |
Which of the following is/are the application of analytical centrifugation?I. The determination of the purity of macromolecules.II. The determination of the relative molecular masses of solutes in their native state.III. The examination of changes in the molecular mass of supramolecular complexes.IV. The detection of conformational changes. |
| A. | I only |
| B. | I and II only |
| C. | I, II and III only |
| D. | I, II, III and IV |
| Answer» E. | |
| 170. |
Which of the following is/are appropriate care and maintenance of centrifuges?I. Proper balancing of centrifuge tubes.II. Avoid long time exposure of the rotors to alkaline solution and acidic buffers.III. Cleaning centrifuges and rotors with coarse brushes and then wash them with distilled or de-ionized water after every run.IV. For overnight storage, the rotors are left upside down and then positioned in a safe and dry place. |
| A. | I, II, III only |
| B. | II, III and IV only |
| C. | I, II, and IV only |
| D. | II only |
| Answer» D. II only | |
| 171. |
Which of the following statements about the basic principle of sedimentation is False? |
| A. | The denser a biological structure is, the faster it sediments in a centrifugal field |
| B. | The more massive a biological particle is, the slower it moves in a centrifugal field |
| C. | The denser the buffer system is, the slower the particle will move in a centrifugal field |
| D. | The greater the centrifugal force is, the faster the particle sediments |
| Answer» C. The denser the buffer system is, the slower the particle will move in a centrifugal field | |
| 172. |
Process quicker than filtration but not so effective is __________ |
| A. | decanting |
| B. | centrifuging |
| C. | crystallization |
| D. | fractional distillation |
| Answer» B. centrifuging | |
| 173. |
After centrifugation when sublimate settles, clear liquid _____________ |
| A. | can be allowed to rest |
| B. | can be allowed to form crystals |
| C. | can be decanted off |
| D. | can be evaporated |
| Answer» D. can be evaporated | |
| 174. |
The skimming efficiency of a separator consequently decreases with increased throughput. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 175. |
If you were centrifuging whole milk, which would you expect to get flung further out from the center of the centrifuge? |
| A. | The cream/fat |
| B. | Both would be equally flung |
| C. | The skim milk |
| D. | Neither would be flung |
| Answer» D. Neither would be flung | |
| 176. |
Which of the following scientist invented the centrifugal separator? |
| A. | Gustaf de Laval |
| B. | Donald ronholm |
| C. | Luis pastuer |
| D. | Rutherford |
| Answer» B. Donald ronholm | |
| 177. |
How does centrifugation work? |
| A. | Through dripping particles |
| B. | Through spinning |
| C. | By keeping large particle in the center and smaller on the outside |
| D. | By separating particles into different tubes |
| Answer» D. By separating particles into different tubes | |
| 178. |
Which among the following surface promote heat transfer? |
| A. | Plain |
| B. | Shiny |
| C. | Corrugated |
| D. | Wet |
| Answer» D. Wet | |
| 179. |
______________ tells how much heat passes through 1 m² of the partition per 1°C of differential temperature. |
| A. | Friction coefficient |
| B. | Temperature coefficient |
| C. | Overall heat transfer coefficient |
| D. | Time coefficient |
| Answer» B. Temperature coefficient | |
| 180. |
_______ Heat exchanger is needed for cream than for milk, if capacities and temperature programs are identical. |
| A. | Larger |
| B. | Smaller |
| C. | Similar |
| D. | Stagnant |
| Answer» B. Smaller | |
| 181. |
Which of the following are different forms of membrane filter construction?I) Hollow filterII) TMPIII) Spiral woundIV) CeramicV) Cross flowVI) Electro dialysis |
| A. | I), III) IV) and VI) |
| B. | I),II),III) and IV) |
| C. | I) and II) |
| D. | III) and IV) |
| Answer» B. I),II),III) and IV) | |
| 182. |
Name of the evaporator which consists of one pass vertical shell and tube heat exchanger discharging the product to be evaporated into a relatively small vapor head? |
| A. | Horizontal tube evaporator |
| B. | Long tube vertical evaporator |
| C. | Vacuum pan evaporator |
| D. | Forced circulation evaporator |
| Answer» C. Vacuum pan evaporator | |
| 183. |
Efficiency of milk deaerator depends on which of the following factor? |
| A. | Fat content |
| B. | Nutrition |
| C. | Fat globule size |
| D. | Dispersion of air |
| Answer» E. | |
| 184. |
Rate of evaporation decreases as? |
| A. | temperature increases |
| B. | humidity of surrounding air increases |
| C. | movement of air above surface of liquid increases |
| D. | atmospheric pressure decreases |
| Answer» C. movement of air above surface of liquid increases | |
| 185. |
Pump transfers the mechanical energy of a motor or of an engine into _________ of a fluid. |
| A. | Pressure energy |
| B. | Kinetic energy |
| C. | Either pressure energy or kinetic energy |
| D. | Pressure energy, kinetic energy or both |
| Answer» E. | |
| 186. |
Which law forms the basis of working of deaerator? |
| A. | James law |
| B. | Planck law |
| C. | Law of thermodynamic |
| D. | Henry law |
| Answer» E. | |
| 187. |
The time between conception and parturition is called ______ |
| A. | reproduction period |
| B. | gestation period |
| C. | feed period |
| D. | pregnancy |
| Answer» C. feed period | |
| 188. |
What management practice helps prevent navel ill in newborn calves? |
| A. | dipping foot |
| B. | dipping navel in iodine |
| C. | ethylene treatment |
| D. | milking |
| Answer» C. ethylene treatment | |
| 189. |
Which of the following are installed in order to collect product samples hygienically for quality analysis? |
| A. | Bends |
| B. | Reducers |
| C. | Sampling device |
| D. | Tees |
| Answer» D. Tees | |
| 190. |
What are the tiny cells in a cows udder called? |
| A. | Alveoli |
| B. | Hind |
| C. | Leg |
| D. | Nipple |
| Answer» B. Hind | |
| 191. |
Homogenization in which the main body of skim milk is not homogenized, but only the cream together with a small proportion of skim milk is homogenized is called? |
| A. | Complete homogenization |
| B. | Partial homogenization |
| C. | Concentrate homogenization |
| D. | Pasteurized homogenization |
| Answer» C. Concentrate homogenization | |
| 192. |
Milk in udder contains what percentage of gases? |
| A. | 4.5-6% |
| B. | 7-8% |
| C. | 4-5% |
| D. | >10% |
| Answer» B. 7-8% | |
| 193. |
Calculate temperature change: 20,000 l/h cheese milk (V1) is to be heated from 4°C to 34°C by 30,000 l/h hot water (V2) at 50°C. Density (r) and specific heat (cp) for milk are about 1020 kg/m³ and 3.95 kJ/kg, K and for water 990 (at 50°C) and 4.18. |
| A. | 20.5℃ |
| B. | 21.5℃ |
| C. | 18.8℃ |
| D. | 19.5℃ |
| Answer» E. | |
| 194. |
The pipes will expand considerably when the product temperatures are high and during cleaning. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 195. |
Which of the following qualities do not determine the percent recovery in membrane treatment? |
| A. | Membrane filtration level selected |
| B. | Characteristic of membrane itself |
| C. | Quality of feed water |
| D. | Nutritional content of feed |
| Answer» E. | |
| 196. |
Storage tank are double shelled. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 197. |
Which of the following is the application of direct heating in the dairy industry? |
| A. | Heating curd in the manufacture of cheese |
| B. | Solar heating |
| C. | Heating with gamma rays |
| D. | Oxidation |
| Answer» B. Solar heating | |
| 198. |
What is the cow’s first milk called? |
| A. | Holostrum |
| B. | Drostrum |
| C. | Colostrum |
| D. | milk |
| Answer» D. milk | |
| 199. |
Heat exchanger works on which of the following principle? |
| A. | Direct heating |
| B. | Indirect heating |
| C. | Slow heating |
| D. | Fast heating |
| Answer» B. Indirect heating | |
| 200. |
The temperature difference between the two liquids is best utilized if they flow in opposite directions through the heat exchanger. This type of flow is called ________ |
| A. | Countercurrent |
| B. | Concurrent |
| C. | Rapid flow |
| D. | Slow flow |
| Answer» B. Concurrent | |