MCQOPTIONS
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MCQOPTIONS
This section includes 24 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. |
In which of the following type of heat exchanger the heat exchange between the two fluids occur by their complete physical mixing? |
| A. | Direct contact heat exchanger |
| B. | Indirect contact heat exchanger |
| C. | Recuperator |
| D. | Regenerator |
| Answer» B. Indirect contact heat exchanger | |
| 2. |
Number of categories heat exchanger can be classified based on the physical state of heat exchanging fluid is ____ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 3. |
Number of categories heat exchanger can be classified based on the mechanical design of heat exchanger surface is ______ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 4. |
Number of categories heat exchanger can be classified based on the direction of flow of fluids is ______ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 5. |
In which of the following recuperator heat exchanger is not used? |
| A. | Evaporator |
| B. | Chemical factories |
| C. | Automobile radiators |
| D. | Condensers |
| Answer» C. Automobile radiators | |
| 6. |
Which type of flow arrangement is this? |
| A. | Parallel |
| B. | Counter |
| C. | Regenerator |
| D. | Shell and tube |
| Answer» C. Regenerator | |
| 7. |
How many categories heat exchanger can be classified based on nature of heat exchange process? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 8. |
LMTD in case of condenser will ________ for counter and parallel flow heat exchanger. |
| A. | Remain same |
| B. | Not be equal |
| C. | Cannot be determined |
| D. | Will not change with time |
| Answer» B. Not be equal | |
| 9. |
What property of cold fluid remains constant in case of evaporator? |
| A. | Volume |
| B. | Temperature |
| C. | Entropy |
| D. | Enthalpy |
| Answer» C. Entropy | |
| 10. |
Which of the following is not an application of regenerator? |
| A. | Jet condenser |
| B. | Steam power plant |
| C. | Oxygen producer |
| D. | Blast furnace |
| Answer» B. Steam power plant | |
| 11. |
In which type of heat exchanger the same space is occupied by the hot and cold gases, between which heat is exchanged? |
| A. | Recuperator |
| B. | Regenerator |
| C. | Direct contact heat exchanger |
| D. | Indirect contact heat exchanger |
| Answer» C. Direct contact heat exchanger | |
| 12. |
Surface heat exchangers are also known as _______ |
| A. | Direct contact heat exchanger |
| B. | Indirect contact heat exchanger |
| C. | Recuperator |
| D. | Regenerator |
| Answer» D. Regenerator | |
| 13. |
A periodic type heat exchanger is known as _____ |
| A. | Direct contact heat exchanger |
| B. | Indirect contact heat exchanger |
| C. | Recuperator |
| D. | Regenerator |
| Answer» E. | |
| 14. |
‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ‚À´A_ROOF_ACCUMULATES_SOLAR_HEAT_DURING_THE_DAY_AND_RADIATES_THE_HEAT_AT_NIGHT‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖŒÄ_IS_AN_EXAMPLE_OF_WHICH_OF_THE_FOLLOWING_WAY_OF_HEAT_TRANSFER??$# |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Filtration |
| Answer» D. Filtration | |
| 15. |
Heat exchanger works on which of the following principal?$ |
| A. | Direct heating |
| B. | Indirect heating |
| C. | Slow heating |
| D. | Fast heating |
| Answer» B. Indirect heating | |
| 16. |
Which_of_the_following_is_the_application_of_direct_heating_in_dairy_industry?$ |
| A. | Heating curd in manufacture of cheese |
| B. | Solar heating |
| C. | Heating with gamma rays |
| D. | Oxidation |
| Answer» B. Solar heating | |
| 17. |
______________ 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 | |
| 18. |
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 | |
| 19. |
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‚ÑÉ |
| B. | 21.5‚ÑÉ |
| C. | 18.8‚ÑÉ |
| D. | 19.5‚ÑÉ |
| Answer» E. | |
| 20. |
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 | |
| 21. |
“The spoon is rinsed in running cold water. Heat gets absorbed by the water and the spoon gets cooler, until the spoon and the water are at the same temperature” is an example of which of the following way of heat transfer?# |
| A. | Conduction |
| B. | Convection |
| C. | Radiation |
| D. | Filtration |
| Answer» C. Radiation | |
| 22. |
“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» E. | |
| 23. |
Which of the following is the time-temperature combination for HTST pasteurization? |
| 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» B. 135¬¨¬®‚Äö√†√ªC to 140¬¨¬®‚Äö√†√ªC for 2 to 4 seconds. | |
| 24. |
Pasteurization aid in which of the following? |
| A. | killing tubercle bacillus |
| B. | killing spores |
| C. | increasing fat content |
| D. | lowering temperature |
| Answer» B. killing spores | |