MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Dairy Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Frost is formed on cooling coils due to ______ |
| A. | Moisture present in evaporator |
| B. | Moisture present in condenser |
| C. | Moisture present in compressor |
| D. | None of these |
| Answer» B. Moisture present in condenser | |
| 2. |
Dry evaporator is one in which? |
| A. | The exit from evaporator is dry saturated refrigerant |
| B. | The exit from evaporator is superheated refrigerant |
| C. | The exit from evaporator has refrigerant with high dryness fraction |
| D. | The inlet to the evaporator has refrigerant with some dryness fraction |
| Answer» C. The exit from evaporator has refrigerant with high dryness fraction | |
| 3. |
A suction line liquid line heat exchanger cause |
| A. | Subcooling of liquid refrigerant entering the expansion device |
| B. | Superheating of the suction vapour |
| C. | May increase or decrease COP |
| D. | All of the above |
| Answer» E. | |
| 4. |
In the evaporator of refrigerator system, the refrigerant changes from ______ |
| A. | Vapour to liquid |
| B. | Liquid to vapour |
| C. | Remains in liquid form |
| D. | None of these |
| Answer» C. Remains in liquid form | |
| 5. |
Plate type evaporators are employed in |
| A. | Air cooler |
| B. | Window AC |
| C. | Refrigerator |
| D. | Split Air conditioner |
| Answer» D. Split Air conditioner | |
| 6. |
GREAT_ECONOMIES_OF_OPERATION_MAY_BE_MADE_IN_LARGE_INSTALLATIONS_WITH____________?$ |
| A. | Multiple effect evaporator |
| B. | Centri-therm evaporator |
| C. | Falling film evaporator |
| D. | Rising film evaporator |
| Answer» B. Centri-therm evaporator | |
| 7. |
Evaporators in dairy industry don’t concentrate which of the following?$# |
| A. | Whole and skimmed milk |
| B. | Whey |
| C. | Condensed milk |
| D. | Cheese |
| Answer» E. | |
| 8. |
Device_used_to_improve_thermal_efficiency_of_evaporator_is_called?$ |
| A. | Thermo compressor |
| B. | Deareater |
| C. | Dryer |
| D. | Pasteurizer |
| Answer» B. Deareater | |
| 9. |
________ Rule is often used to compare a pure liquid and a solution at a given concentration. |
| A. | Duhring’s rule |
| B. | Plank rule |
| C. | Friction rule |
| D. | Doppler rule |
| Answer» B. Plank rule | |
| 10. |
Single effect evaporation is simple and steam effective. State true or false. |
| A. | True |
| B. | False |
| Answer» C. | |
| 11. |
__________ is the total mass of water vaporized per unit mass of steam input to the evaporator. |
| A. | Efficiency of evaporator |
| B. | Economy of evaporator |
| C. | Rate of evaporator |
| D. | Capacity of evaporator |
| Answer» C. Rate of evaporator | |
| 12. |
Ratio of capacity to economy is known as ________ |
| A. | Water consumption per hour |
| B. | Steam consumption per hour |
| C. | Sediment consumption per hour |
| D. | Milk consumption per hour |
| Answer» C. Sediment consumption per hour | |
| 13. |
Which of the following is not the advantage of falling film evaporator? |
| A. | Short residence time of liquid |
| B. | Good performance with small temperature difference across heating surfaces |
| C. | Operates at lower temperature difference than rising film evaporator |
| D. | Long residence time of liquid |
| Answer» E. | |
| 14. |
As the film rises further evaporation occurs until they reach the top of the tubes. The mixture of vapor and milk then passes into a separate chamber from which the vapor passes to a condenser. Name the evaporator. |
| A. | Climbing film evaporator |
| B. | Falling film evaporator |
| C. | Plate evaporator |
| D. | Forced circulation evaporator |
| Answer» B. Falling film evaporator | |
| 15. |
Which of the following is the disadvantage of climbing film evaporator? |
| A. | Severe scale formation |
| B. | Over heating |
| C. | Small concentration |
| D. | Low pressure |
| Answer» B. Over heating | |
| 16. |
The deflector used in long tube vertical evaporator can be used as? |
| A. | Vapor separator |
| B. | Foam breaker |
| C. | Pasteurizer |
| D. | Vapor separator and foam breaker |
| Answer» E. | |
| 17. |
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 | |
| 18. |
Evaporators in which pumps are used to force the evaporating liquid through the tubes are called? |
| A. | Horizontal tube evaporator |
| B. | Vertical tube evaporator |
| C. | Vacuum pan evaporator |
| D. | Forced circulation evaporator |
| Answer» C. Vacuum pan evaporator | |
| 19. |
Evaporator which promotes natural circulation is? |
| A. | Horizontal tube evaporator |
| B. | Vertical tube evaporator |
| C. | Vacuum pan evaporator |
| D. | Forced circulation evaporator |
| Answer» C. Vacuum pan evaporator | |
| 20. |
The evaporator in which the material to be evaporated boils outside the horizontal tube and steam condenses inside the tubes is called________ |
| A. | Horizontal tube evaporator |
| B. | Vertical tube evaporator |
| C. | Vacuum pan evaporator |
| D. | Forced circulation evaporator |
| Answer» B. Vertical tube evaporator | |