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This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Civil Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The disappearance of the plants and animals is due to the _________ in water. www.rejinpaul.comwww.rejinpaul.com Download updated materials from Rejinpaul Network App |
| A. | Nitrogen depletion |
| B. | Chlorine depletion |
| C. | Oxygen depletion |
| D. | Ozone depletion |
| Answer» D. Ozone depletion | |
| 2. |
The presence of which of the following in sewage indicates nitrogen content before decomposition of sewage? |
| A. | Nitrites |
| B. | Nitrates |
| C. | Free ammonia |
| D. | Albuminoid nitrogen |
| Answer» E. | |
| 3. |
The decomposition of sewage takes place, causing a pungent smell. Which of the following causes the pungent smell? |
| A. | CO2 |
| B. | H2SO4 |
| C. | HCL |
| D. | H2S |
| Answer» E. | |
| 4. |
The propulsion of water into steam drum by extremely rapid, almost explosive boiling of water at the heating surface is called ___________ |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» C. Corrosion | |
| 5. |
The phenomenon during which the boiler material becomes brittle due to accumulation of caustic substances is known as ___________ |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» E. | |
| 6. |
The addition of substances or energy forms that directly or indirectly alter the nature of the water body is called? |
| A. | Water contamination |
| B. | Water pollution |
| C. | Sanitation |
| D. | Water treatment |
| Answer» C. Sanitation | |
| 7. |
What is the growth of huge amounts of algae and other aquatic plants leading to the deterioration of the water quality called? |
| A. | Eutrophication |
| B. | Algae growth |
| C. | Nitrification |
| D. | Denitrification |
| Answer» B. Algae growth | |
| 8. |
Ws = Wsp + Wss What does Wsp stand for in the above equation? |
| A. | Total dry solids |
| B. | Raw primary solids |
| C. | Suspended solids |
| D. | none |
| Answer» C. Suspended solids | |
| 9. |
In ion-exchange process, the capital cost is _________ and the operational expenses are ______________ |
| A. | Low, high |
| B. | High, low |
| C. | High, high |
| D. | Low, low |
| Answer» D. Low, low | |
| 10. |
What is CU in the expression CU= D60/D10 where D60 and D10 are the sizes of particle such that 60% and 10% of the particles are finer than these sizes respectively? |
| A. | Coefficient of compaction |
| B. | Coefficient of consolidation |
| C. | Uniformity coefficient |
| D. | Effective size |
| Answer» D. Effective size | |
| 11. |
__________ requires EPA to establish regulations to protect human health from contaminants present in drinking water. |
| A. | SAWD |
| B. | SDWA |
| C. | ASAW |
| D. | SWSA |
| Answer» C. ASAW | |
| 12. |
In the concept of self purification of natural streams, complete the following phrase. Solution to pollution is _________ |
| A. | Control |
| B. | Dilution |
| C. | Reuse |
| D. | Recycle |
| Answer» C. Reuse | |
| 13. |
_________ is accomplished by the replenishment of oxygen lost to bacterial degradation of organic waste. |
| A. | Gas transfer |
| B. | Dilution |
| C. | Filtration |
| D. | Re-suspension |
| Answer» B. Dilution | |
| 14. |
The central pollution control board and the department of ocean and environment has established __________ stations over the entire coastal line of the country. |
| A. | 171 |
| B. | 172 |
| C. | 173 |
| D. | 174 |
| Answer» E. | |
| 15. |
The Federal Water Pollution Control Act of 1948 was the first major U.S. law to address water pollution. |
| A. | 1945 |
| B. | 1946 |
| C. | 1947 |
| D. | 1948 |
| Answer» E. | |
| 16. |
If the precipitate formed is soft, loose and slimy, these are __________ and if the precipitate is hard and adhering on the inner wall, it is called _____________ |
| A. | Sludges, scale |
| B. | Scale, sludges |
| C. | Sludges, rodent |
| D. | Scale, rodent |
| Answer» B. Scale, sludges | |