MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Environmental Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The superficial velocity in a stratified bed is equal to __________ |
| A. | Terminal settling velocity |
| B. | Terminal settling velocity * porosity |
| C. | Terminal settling velocity * (porosity)<sup>2</sup> |
| D. | Terminal settling velocity * (porosity)<sup>4.5</sup> |
| Answer» E. | |
| 2. |
When does the particle become suspended in an expanded bed? |
| A. | When superficial velocity is greater than critical velocity |
| B. | When superficial velocity is less than critical velocity |
| C. | When superficial velocity is equal to critical velocity |
| D. | When superficial velocity is constant |
| Answer» D. When superficial velocity is constant | |
| 3. |
Rose equation is valid for beds in which voids are clear and unobstructed. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
The value of Reynolds number R is 1.5. The coefficient of drag is? |
| A. | 8 |
| B. | 10 |
| C. | 12 |
| D. | 16 |
| Answer» E. | |
| 5. |
When the Reynolds number is greater than 1.9 but less than 500, the coefficient of drag CD is? |
| A. | CD = 24/R |
| B. | CD = R/24 |
| C. | CD = 18.5/R<sup>0.6</sup> |
| D. | CD = R<sup>0.6</sup>/18.5 |
| Answer» D. CD = R<sup>0.6</sup>/18.5 | |
| 6. |
Which of the following has the highest shape factor as stated by Carmen? |
| A. | Ottawa sand |
| B. | Pulverized coal |
| C. | Rounded coal |
| D. | Angular sand |
| Answer» B. Pulverized coal | |
| 7. |
The head loss through the bed of solids of the filter can be determined by __________ |
| A. | Carmen-Kozney equation |
| B. | Rose equation |
| C. | Carmen-Kozney and Rose equation |
| D. | Charles equation |
| Answer» D. Charles equation | |