MCQOPTIONS
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MCQOPTIONS
This section includes 122 Mcqs, each offering curated multiple-choice questions to sharpen your Bioprocess Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The size of filter media in a high rate trickling filter is ___________ |
| A. | 10-20mm |
| B. | 34-68mm |
| C. | 25-60mm |
| D. | 20-50mm |
| Answer» D. 20-50mm | |
| 102. |
The surface loading rate of a secondary clarifier is ______ litres/m²/day. |
| A. | 1000 |
| B. | 10000 |
| C. | 20000 |
| D. | 40000 |
| Answer» E. | |
| 103. |
The detention period of a secondary clarifier is ___________ |
| A. | 30 minutes |
| B. | 1 hour |
| C. | 2 hours |
| D. | 4 hours |
| Answer» D. 4 hours | |
| 104. |
Which of the following is the cause of rising sludge? |
| A. | Sedimentation |
| B. | Denitrification |
| C. | Chlorination |
| D. | Flocculation |
| Answer» C. Chlorination | |
| 105. |
The minimum weir loading rate of primary clarifier is ____m³/m/day. |
| A. | 125000 |
| B. | 50000 |
| C. | 10000 |
| D. | 20000 |
| Answer» B. 50000 | |
| 106. |
Hopper bottom vertical flow type tank is _____ in shape. |
| A. | Circular |
| B. | Triangular |
| C. | Rectangular |
| D. | Elliptical |
| Answer» B. Triangular | |
| 107. |
The depth of the filter media of intermittent filter is ___________ |
| A. | 45cm |
| B. | 60cm |
| C. | 20cm |
| D. | 25cm |
| Answer» C. 20cm | |
| 108. |
The intermittent sand filters have better BOD removal efficiency than trickling filters. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 109. |
The filter material used in contact bed is ___________ |
| A. | Sand |
| B. | Stone ballast |
| C. | Gravel |
| D. | Fine sand |
| Answer» C. Gravel | |
| 110. |
Which of the following is called as contact bed? |
| A. | Primary clarifier |
| B. | Secondary clarifier |
| C. | Contact filter |
| D. | High rate digester |
| Answer» D. High rate digester | |
| 111. |
How many types of trickling filters are used in sewage treatment? |
| A. | 6 |
| B. | 5 |
| C. | 3 |
| D. | 2 |
| Answer» E. | |
| 112. |
WHAT_TYPE_OF_FILTER_DOES_NOT_COME_UNDER_THE_MEMBRANE_FILTERS??$ |
| A. | Ultra filtration |
| B. | Microfiltration |
| C. | Precoat (filter aid) filtration |
| D. | Nanofiltration |
| Answer» D. Nanofiltration | |
| 113. |
Which of the following do not comes under continuous filtration?$ |
| A. | Vacuum rotary drum filter |
| B. | Rubber belt filter |
| C. | Belt filter cake discharge |
| D. | Disc filter |
| Answer» E. | |
| 114. |
What_do_you_mean_by_the_term”Backwashing”?$# |
| A. | Excluding intermittent use of compressed air during the process |
| B. | Is a form of destructive maintenance |
| C. | Washing at the backside of the filter |
| D. | including intermittent use of compressed air during the process. |
| Answer» E. | |
| 115. |
Can Microfiltration be used to remove viruses? |
| A. | True |
| B. | False |
| Answer» C. | |
| 116. |
Refer to Q6, and find out the normal filtration rate? |
| A. | 154.3 m<sup>3</sup>/(m<sup>2</sup>.d) |
| B. | 154.6 m<sup>3</sup>/(m<sup>2</sup>.d) |
| C. | 155.6 m<sup>3</sup>/(m<sup>2</sup>.d) |
| D. | 155.3 m<sup>3</sup>/(m<sup>2</sup>.d) |
| Answer» B. 154.6 m<sup>3</sup>/(m<sup>2</sup>.d) | |
| 117. |
A city is to install rapid sand filters downstream of the clarifiers. The design loading rate is selected to be 160 m3/ (m2.d). The design capacity of the water works is 0.35 m3/s. The maximum surface per filter is limited to 50 m2. Design the number and size of filters. |
| A. | 189 m<sup>2</sup>, 4.78 |
| B. | 189 m<sup>2</sup>, 3.78 |
| C. | 167 m<sup>2</sup>,2.66 |
| D. | 167 m<sup>2</sup>,2.78 |
| Answer» C. 167 m<sup>2</sup>,2.66 | |
| 118. |
A rotary drum filter with 30% submergence is used to filter concentrated aqueous slurry of calcium carbonate containing 15lb of solids per cubic foot of water. The pressure–drop is 2011Hg. If the filter cake contains 50% mixture (wet basis), calculate the filter area required to filter 10 gal/min of slurry. The filter cycle time is 5 min. The specific cake resistance depends on the pressure–drop as:$ |
| A. | = α ̥(Δp)<sup>0.26</sup>, where α = 2.90×10<sup>10</sup> |
| B. | |
| C. | ‚âÖ 88 ft<sup>2</sup> |
| Answer» D. | |
| 119. |
Is plate frame filter a batch filter? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 120. |
“Filter aid can also be added to the fermentation broth to increase the porosity of the cake as it forms”, what does this statement means?$ |
| A. | To increase the pH of the fermentation broth |
| B. | To decrease the filtration rate |
| C. | To decrease the pI of the fermentation broth |
| D. | To increase the filtration rate |
| Answer» E. | |
| 121. |
For which phase filter aid is used to filter? |
| A. | Gas and liquid |
| B. | Solid and Liquid |
| C. | Gas |
| D. | Gel |
| Answer» C. Gas | |
| 122. |
What does the term Positive pressure means? |
| A. | The contaminants of the room should not flow out into the surrounding |
| B. | There should be the balance between the room and surrounding of air and contaminants |
| C. | The pressure makes room isolated from the surrounding and contaminants |
| D. | The air pressure is lower than the surrounding |
| Answer» D. The air pressure is lower than the surrounding | |