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Environmental Engineering MCQs with Answers & Solutions — Page 5 | Civexa

Subjects / Environmental Engineering / MCQs

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Environmental Engineering MCQs with answers

315 free questions — page 5 of 7. Open one to see the correct answer and the full solution.

A CETP operator observes frequent foaming, poor settling and fluctuating MLSS. The most likely underlying cause isWastewater Treatment
In biological nitrogen removal, the correct sequence isWastewater Treatment
A membrane bioreactor is best distinguished from a conventional activated sludge process by the fact thatWastewater Treatment
While designing a circular primary sedimentation tank, if the surface overflow rate (SOR) is decreased while keeping the discharge constant, what…Wastewater Treatment
Which of the following statements about COD and BOD is FALSE?Water Quality Parameters
In a conventional activated sludge process, the correct sequence of unit operations after preliminary treatment isWastewater Treatment
The key difference between primary sludge and secondary (biological) sludge is thatWastewater Treatment
As per Central Pollution Control Board (CPCB), the permissible limit for oil and grease in industrial effluent discharged into inland surface water isDisposal of Sewage Effluents
Which of the following statements is/are true? (i) Pyrolysis and plasma gasification are advanced waste-to-energy technologies that thermally convert…Solid Waste Management
Under the Indian National Ambient Air Quality Standards (2009), what is the permissible annual average concentration for PM2.5 in industrial and…Air Pollution
Which of the following pollutants was not included in the original National Ambient Air Quality Standards (1982) but was added later to the 12…Air Pollution
Which Pasquill stability class represents the most ‘unstable’ atmospheric condition, typically occurring on a sunny day with low wind speed?Air Pollution
Under Class F conditions, how does a smoke plume typically behave?Air Pollution
Which of the following is a secondary pollutant that is essential for the formation of photochemical smog?Air Pollution
Photochemical smog is most likely to reach its peak intensity duringAir Pollution
The migration velocity in an Electrostatic Precipitator refers to the velocity at whichAir Pollution
Which mechanism is most dominant for capturing very fine particles (less than 0.1 μm) in a fabric filter?Air Pollution
The efficiency of a cyclone separator increases with a/anAir Pollution
If a dust particle has a physical density significantly greater than 1 g/cm3, how will its aerodynamic diameter (da) compare to its actual geometric…Air Pollution
If two identical noise sources, each producing a sound pressure level of 70 dB, are switched on simultaneously, what is the resulting total sound…Noise Pollution
In environmental noise monitoring, the "A-weighting" (dBA) scale is most commonly used becauseNoise Pollution
The L90 statistical descriptor in noise measurement is primarily used to representNoise Pollution
For a noise barrier (such as a highway sound wall) to be effective, which physical phenomenon must be minimized to prevent sound from reaching the…Noise Pollution
When designing a building to mitigate external noise, which property of a material is most critical for reducing the transmission of airborne noise?Noise Pollution
What needs to be maintained to avoid the odour problem in tannery effluent treatment ?Wastewater Treatment
The impurities in water which are extremely small size particles and cannot be removed by settling and filtration are known asWater Treatment
What is the function of flocculator in the typical water treatment scheme for surface water ?Water Treatment
What is the function of rapid mixing in the typical water treatment flow scheme for ground water with high hardness ?Water Treatment
Match the following lists : List I (Type of commercial building/institution): P. Restaurants Q. Nurses homes and medical quarters R. Cinemas, concert…Water Demand Estimation
Consider the following statements regarding quality difference of ground water and surface water : 1. The Turbidity of ground water is high, whereas…Water Demand Estimation
If P is population of town/city, Q is total quantity of water required during one year for a town/city; what is the formula for maximum daily per…Water Demand Estimation
If Pn = Population at the end of n decade, Po = Present population, Pav = Average arithmetic increase in the population (decadal), PI = Average…Water Demand Estimation
If Q is the water requirement in L/min and P is population in thousands, what is Buston’s formula to determine fire demand ?Water Demand Estimation
What is meant by soffit ?Sewer Appurtenances
What is the logical extension of the pit privy ?Disposal of Sewage Effluents
What is a drawback of aerobically digested sludges ?Sludge Treatment
Which of the following statement(s) is/are true regarding considering the Noise Pollution (Regulation and Control) Rules, 2000? (i). The State…Noise Pollution
According to the Noise Pollution (Regulation and Control) Rules, 2000, during which hours may the State Government permit the use of loud speakers or…Noise Pollution
Which of the following restriction(s) on the use of horns, sound emitting construction equipments and bursting of crackers is/are correct for…Noise Pollution
Which of the following statement(s) is/are true? (i). Under the plan scheme “Metropolitan Advisories for Cities for Sports, Tourism (Metropolitan Air…Air Pollution
If the Air Quality Index (AQI) is in the range of 201-300, then it is categorized asAir Pollution
Electrostatic precipitators are suitable for removing (i). Fly ash from coal combustion (ii). Cement dust (iii). Sulfur dioxide gasAir Pollution
Out of the seven oxides of Nitrogen (N₂ O, NO, NO₂ , NO₃ , N₂O₃ , N₂ O₄ , N₂O₅ ) which are associated with combustion and are classified as…Air Pollution
Which of the following statement(s) is/are true regarding Terms of Reference (ToR) in Environmental Impact Assessment (EIA) study? (i). ToR is a…Environmental Impact Assessment
In which of the cases, Environmental Impact Assessment (EIA) clearance is required? (i). Building construction projects (≥ 15,000 m2 ) (ii). Township…Environmental Impact Assessment
In Terms of Reference (ToR) for Environmental Impact Assessment of building construction and township and area development projects, which of the…Environmental Impact Assessment
According to India's Solid Waste Management (SWM) Rules, 2016, non-recyclable waste with a calorific value of ______ kcal/kg or higher should be used…Solid Waste Management
What is the primary purpose of biomining in the closure of old dumps?Solid Waste Management
Which of the following parameters are used to categorize the river stretches as critically polluted, severely polluted, moderately polluted, less…Water Quality Parameters
Under Extended Producer Responsibility (EPR), producers are responsible for (i). Designing products for easier recycling (ii). Collecting and…Solid Waste Management

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