MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
For surface water system, the required residual disinfectant concentration may not be less than _______ mg/L for more than ___________ hours before the first customer. |
| A. | 0.2, 6 |
| B. | 2.0, 6 |
| C. | 0.2, 4 |
| D. | 2.0, 4 |
| Answer» D. 2.0, 4 | |
| 2. |
Which of the following mechanisms is not used by a membrane filter to remove particulate material from the water? |
| A. | flux |
| B. | reverse flow |
| C. | particle counts |
| D. | chlorine |
| Answer» C. particle counts | |
| 3. |
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 | |
| 4. |
Which of the following is a valid name for a test for testing membrane integrity? |
| A. | Flux membrane test |
| B. | Reversal of flow test |
| C. | Air pressure hold test |
| D. | Sediment test |
| Answer» D. Sediment test | |
| 5. |
A raw water reservoir would be an example of which membrane pretreatment method (where the goal is to reduce the loading and fouling potential of the water fed to the membrane)? |
| A. | Filtration |
| B. | Clarification |
| C. | Chemical treatment |
| D. | Pasteurization |
| E. | ?a) Filtrationb) Clarificationc) Chemical treatmentd) Pasteurization |
| Answer» C. Chemical treatment | |
| 6. |
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) | |
| 7. |
Which of the following remains the primary use of membrane filtration in water treatment? |
| A. | Desalination of salt water to produce potable water |
| B. | A pretreatment step in water treatment |
| C. | Filtration of surface or ground water under the direct influence of surface water |
| D. | Pre heating |
| Answer» B. A pretreatment step in water treatment | |
| 8. |
The filtered water that has been treated by a membrane filter is called _____________ |
| A. | Permeate |
| B. | Concentrate |
| C. | Reject |
| D. | Pulp |
| Answer» B. Concentrate | |
| 9. |
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 | |
| 10. |
The flow rate through the membrane filter itself expressed as a gallon per square foot per day is called? |
| A. | Permeate |
| B. | Head loss |
| C. | Flux |
| D. | Overhead |
| Answer» D. Overhead | |
| 11. |
The membrane filtration level with the smallest pore size (0.0001 – 0.001 µm) is called_____________ |
| A. | Micro filtration |
| B. | Reverse osmosis |
| C. | Nano filtration |
| D. | Ultra filtration |
| Answer» C. Nano filtration | |
| 12. |
Which of the following mechanisms is used by a membrane filter to remove particulate material from the water? |
| A. | Adsorption |
| B. | Settling |
| C. | Straining |
| D. | Crystallization |
| Answer» D. Crystallization | |
| 13. |
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. | |
| 14. |
What is the specific flux of the system if it contains 75 sq. ft. of filter area and operates for 24 hours at a flow rate of 5 gpm? Assume that the water temperature is 20℃ and the TMP of the system is 20 psi. |
| A. | 5.6 gfd/psi |
| B. | 4.8 gfd/psi |
| C. | 9.4 gfd/psi |
| D. | 5.5 gfd/psi |
| Answer» C. 9.4 gfd/psi | |
| 15. |
What is the flux of a membrane filter if it contains 75 sq. ft. of filter area and operates for 24 hours at a flow rate of 5 gpm? Assume that the water temperature is 20℃. |
| A. | 100 gallons per square foot per day |
| B. | 98 gallons per square foot per day |
| C. | 76 gallons per square foot per day |
| D. | 59 gallons per square foot per day |
| Answer» C. 76 gallons per square foot per day | |