MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 140 Mcqs, each offering curated multiple-choice questions to sharpen your Waste Water Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
A pressure difference of _____________ is applied to the vacuum floatation method to remove impurities from sewage. |
| A. | 0.5 atm |
| B. | 1 atm |
| C. | 1.5 atm |
| D. | 2 atm |
| Answer» C. 1.5 atm | |
| 102. |
Which of the following promotes eutrophication of lakes? |
| A. | Magnesium |
| B. | Sodium |
| C. | Calcium |
| D. | Phosphorous |
| Answer» E. | |
| 103. |
The biochemical oxygen demand is computed by __________ |
| A. | Dissolved oxygen / Dilution factor |
| B. | Dissolved oxygen + Dilution factor |
| C. | Dissolved oxygen – Dilution factor |
| D. | Dissolved oxygen * Dilution factor |
| Answer» E. | |
| 104. |
The eutrophication process leads to turbidity in lakes. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 105. |
The average standard BOD of domestic sewage is measured in ____________ |
| A. | ppm |
| B. | Kg/day |
| C. | Kg per person per day |
| D. | Number of persons per day |
| Answer» D. Number of persons per day | |
| 106. |
In which pollution zone of the river, the concentration of D.O reduced to 40%? |
| A. | Zone of degradation |
| B. | Zone of recovery |
| C. | Zone of active decomposition |
| D. | Zone of clean water |
| Answer» D. Zone of clean water | |
| 107. |
What is the maximum capacity of medium screen in collecting solids? |
| A. | 30L |
| B. | 40L |
| C. | 50L |
| D. | 90L |
| Answer» E. | |
| 108. |
The value of deoxygenation constant is independent of the temperature. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 109. |
The expression of relative stability at 20°C is given by ___________ |
| A. | S = (1-(0.794)T²⁰) |
| B. | S = 100 (1-(0.794)ᵀ²⁰) |
| C. | S = 1-(0.794)ᵀ²⁰ |
| D. | S = 100 (0.794)T²⁰ |
| Answer» C. S = 1-(0.794)ᵀ²⁰ | |
| 110. |
The tolerance limit of BOD of sewage to be disposed on land is ____________ |
| A. | 100ppm |
| B. | 200ppm |
| C. | 500ppm |
| D. | 400ppm |
| Answer» D. 400ppm | |
| 111. |
The number of stages required for the completion of aerobic oxidation is __________ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 112. |
The dimension formula of kinematic viscosity is ____________ |
| A. | L⁻¹T |
| B. | ML⁻¹T⁻¹ |
| C. | ML⁻²T⁻² |
| D. | L²T⁻¹ |
| Answer» E. | |
| 113. |
The energy released during the aerobic oxidation of organic matter is _____ kilo calories. |
| A. | 26 |
| B. | 254 |
| C. | 360 |
| D. | 484 |
| Answer» E. | |
| 114. |
Which of the following has a minimum detention period? |
| A. | Sludge digestion tank |
| B. | Primary sedimentation |
| C. | Skimming tank |
| D. | Oxidation pond |
| Answer» D. Oxidation pond | |
| 115. |
The full form of BOD is __________ |
| A. | Biodegradable oxygen demand |
| B. | Biological oxygen demand |
| C. | Biochemical oxygen demand |
| D. | Bandwidth on demand |
| Answer» D. Bandwidth on demand | |
| 116. |
The reoxygenation constant at temperature ‘T’ is expressed by ___________ |
| A. | KRT = Kʀ₂₀ (1.016)ᵀ |
| B. | KRT = Kʀ₂₀ (1.047)ᵀ⁻²⁰ |
| C. | KRT = Kʀ₂₀ (1.016)ᵀ⁻²⁰ |
| D. | KRT = Kʀ₂₀ (1.047)ᵀ |
| Answer» D. KRT = Kʀ₂₀ (1.047)ᵀ | |
| 117. |
Which of the following represents the physical characteristics of water? |
| A. | Chloride content |
| B. | BOD |
| C. | Turbidity |
| D. | COD |
| Answer» D. COD | |
| 118. |
_____ is the amount of oxygen required to oxidize both organic and inorganic matter in sewage. |
| A. | Turbidity |
| B. | BOD |
| C. | COD |
| D. | DO |
| Answer» D. DO | |
| 119. |
The aerobic decomposition of nitrogenous organic matter gives __________ |
| A. | Nitrites and water |
| B. | Carbon dioxide and water |
| C. | Nitrates and ammonia |
| D. | Nitrogen and ammonia |
| Answer» D. Nitrogen and ammonia | |
| 120. |
The relation between dynamic and kinematic viscosity is given by ____________ |
| A. | Dynamic viscosity = Kinematic viscosity * Density of water |
| B. | Kinematic viscosity = Dynamic viscosity + Density of water |
| C. | Dynamic viscosity = Kinematic viscosity * Density of water |
| D. | Dynamic viscosity = Kinematic viscosity / Density of water |
| Answer» E. | |
| 121. |
The oxidizing agent used in COD test is ___________ |
| A. | Potassium chloride |
| B. | Potassium per-manganate |
| C. | Potassium chromate |
| D. | Potassium dichromate |
| Answer» E. | |
| 122. |
The design velocity of flow of a detritus tank is ____________ |
| A. | 1m/Sec |
| B. | 1.2m/Sec |
| C. | 0.9m/Sec |
| D. | 0.5m/Sec |
| Answer» D. 0.5m/Sec | |
| 123. |
The spacing between the bars in racks is ____________ |
| A. | 30mm |
| B. | 50mm |
| C. | 70mm |
| D. | 90mm |
| Answer» C. 70mm | |
| 124. |
The carbonaceous demand occurs due to oxidation of ______________ |
| A. | Ammonia |
| B. | Sulfur |
| C. | Organic matter |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 125. |
The nitrogenous demand occurs due to oxidation of ______________ |
| A. | Ammonia |
| B. | Sulfur |
| C. | Organic matter |
| D. | Nitrogen |
| Answer» B. Sulfur | |
| 126. |
Which of the following represents the first stage BOD in the following figure? |
| A. | ZR |
| B. | RL |
| C. | ZL |
| D. | EP |
| Answer» D. EP | |
| 127. |
Which of the following represents the second stage BOD in the following figure? |
| A. | LP |
| B. | RL |
| C. | ZL |
| D. | EP |
| Answer» B. RL | |
| 128. |
Which of the following is correctly matched in the following figure? |
| A. | ZR – Carbonaceous demand |
| B. | RE – Nitrogenous demand |
| C. | EP – Final demand |
| D. | ZP – Combined demand |
| Answer» E. | |
| 129. |
WHAT_PERCENTAGE_OF_SOLIDS_DOES_WASTEWATER_CONTAIN??$ |
| A. | 0.5% |
| B. | 5% |
| C. | 0.1% |
| D. | 1% |
| Answer» D. 1% | |
| 130. |
At higher temperatures, the amount of Dissolved Oxygen decreases.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 131. |
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 | |
| 132. |
The_optimum_temperature_for_bacterial_activity_is_in_what_range? |
| A. | 25-35 degree Celsius |
| B. | 50 degree Celsius |
| C. | 20 degree Celsius |
| D. | 40 degree Celsius |
| Answer» B. 50 degree Celsius | |
| 133. |
What is the type of pollution where the pollutants reach the water body in points called? |
| A. | Point-source pollution |
| B. | Diffuse pollution |
| C. | Point-source contamination |
| D. | Diffuse contamination |
| Answer» B. Diffuse pollution | |
| 134. |
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 | |
| 135. |
Which of the following requires aesthetically pleasant water? |
| A. | Domestic use |
| B. | Industrial use |
| C. | Irrigation |
| D. | Aquaculture |
| Answer» C. Irrigation | |
| 136. |
What is the next step after water abstraction in wastewater treatment? |
| A. | Supply to consumers |
| B. | Treatment |
| C. | Combine with stormwater |
| D. | Supply to receiving body |
| Answer» C. Combine with stormwater | |
| 137. |
_________ are constructed for water supply, electricity generation, recreation, irrigation and others. |
| A. | Swimming pools |
| B. | Ponds |
| C. | Reservoirs |
| D. | Tanks |
| Answer» D. Tanks | |
| 138. |
There is a direct relation between water use and its required quality. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 139. |
Function of the intended uses of water can achieve the desired water quality. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 140. |
The surface water quality is affected by _______ and infiltration from rainfall. |
| A. | Precipitation |
| B. | Run off |
| C. | Wetlands |
| D. | Farming |
| Answer» C. Wetlands | |