MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
For a circular sewer running partially full, the proportionate wetted perimeter is given by: |
| A. | \(\frac{p}{P}=\frac{D}{4}\) |
| B. | \(\frac{p}{P}=\frac{\alpha}{360^0 }\) |
| C. | \(\frac{p}{P}=\frac{\alpha}{\pi D}\) |
| D. | \(\frac{p}{P}=\frac{\alpha}{180^o}\) |
| Answer» C. \(\frac{p}{P}=\frac{\alpha}{\pi D}\) | |
| 2. |
Anti siphonage pipe is fitted: |
| A. | at the beginning of sewer line |
| B. | with a W.C. trap |
| C. | at the end of septic tank |
| D. | on manholes |
| Answer» C. at the end of septic tank | |
| 3. |
Maximum discharge through a circular channel takes place when depth of flow is equal to |
| A. | 0.95 times the diameter |
| B. | 0.81 times the diameter |
| C. | 0.5 times the diameter |
| D. | 0.3 times the diameter |
| Answer» B. 0.81 times the diameter | |
| 4. |
A sewer which receives storm water, surface runoff and sewage is called a/an |
| A. | common sewer |
| B. | combined sewer |
| C. | branch sewer |
| D. | outfall sewer |
| Answer» C. branch sewer | |
| 5. |
A pipe conveying domestic wastewater from plumbing fixtures of a single building to a common sewer or point of immediate disposal is known as |
| A. | House sewer |
| B. | Lateral sewer |
| C. | Main sewer |
| D. | Sub main sewer |
| Answer» B. Lateral sewer | |
| 6. |
__________ are used for the pipes laid in rivers with uneven bed. |
| A. | Mechanical joint |
| B. | Flexible joint |
| C. | Socket joint |
| D. | Spigot joint |
| Answer» C. Socket joint | |
| 7. |
Intercepting traps are often provided at the junction of: |
| A. | Sullage pipe and floors of kitchen and bath |
| B. | House sewer and municipal sewer |
| C. | Ventilating column and lateral sewer |
| D. | Room or roof drain and the other drain coming from bath and kitchen |
| Answer» C. Ventilating column and lateral sewer | |
| 8. |
In sanitation Man-hole is apparatus for ______ |
| A. | A hole made by man in sewer line in case of blockage |
| B. | Maintenance of sewer lines |
| C. | A chamber to provide control valves |
| D. | None of the above |
| Answer» C. A chamber to provide control valves | |
| 9. |
A combined sewerage system is more appropriate for developed areas where |
| A. | Rainfall occurs for a very few days in a year |
| B. | Rainfall occurs almost uniformly throughout the year |
| C. | Air temperatures are nearly uniform throughout the year |
| D. | Air temperatures through the year included extremes during certain runs of days. |
| Answer» C. Air temperatures are nearly uniform throughout the year | |
| 10. |
Hydraulically for dry weather flow, the best sewer section is |
| A. | circular |
| B. | oval-shaped |
| C. | V-shaped with circular invert |
| D. | rectangular |
| Answer» C. V-shaped with circular invert | |
| 11. |
As per CPHEEO manual, the minimum velocity at initial peak flow and ultimate peak flow in a sewer should not be less than, |
| A. | 0.3 m/s and 0.6 m/s |
| B. | 0.6 m/s and 0.8 m/s |
| C. | 0.6 m/s and 1.2 m/s |
| D. | 1.2 m/s and 3 m/s |
| Answer» C. 0.6 m/s and 1.2 m/s | |
| 12. |
A pipe which carries discharge from water closet is called as_________. |
| A. | soil pipe |
| B. | drain |
| C. | sewer |
| D. | waste pipe |
| Answer» B. drain | |
| 13. |
A sewer is commonly designated to attain self-cleaning velocity at |
| A. | average hourly rate of flow |
| B. | minimum hourly rate of flow |
| C. | sewer running half full |
| D. | peak hourly rate of flow |
| Answer» C. sewer running half full | |
| 14. |
Consider the following statements.A. Avoid building up of sewer gasesB. Ensure atmospheric pressure in the wastewater surfaceC. Ensure the safety of sewer maintenance peopleD. Provide oxidation facility to sewageWhich of these statements correctly suggest why ventilation of sewer lines is necessary? |
| A. | Only A, B and C |
| B. | Only A, C and D |
| C. | Only B, C and D |
| D. | Only A, B and D |
| Answer» B. Only A, C and D | |
| 15. |
A pipe installed for ventilation purpose is called |
| A. | waste pipe |
| B. | soil pipe |
| C. | vent pipe |
| D. | anti-siphonage pipe |
| Answer» D. anti-siphonage pipe | |