MCQOPTIONS
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MCQOPTIONS
This section includes 292 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of the following is a disadvantage of the zeolite process? |
| A. | No sludge is formed |
| B. | The process is almost automatic |
| C. | Suspended impurities get deposited around the zeolite particles |
| D. | Zero hardness can be occurred |
| Answer» D. Zero hardness can be occurred | |
| 102. |
How many types of wastewater treatment plants are there based on the type of wastewater? |
| A. | 5 |
| B. | 4 |
| C. | 2 |
| D. | 3 |
| Answer» E. | |
| 103. |
The Federal Water Pollution Control Act of 1948 was the first major U.S. law to address waterpollution. |
| A. | 1945 |
| B. | 1946 |
| C. | 1947 |
| D. | 1948 |
| Answer» E. | |
| 104. |
The exhausted cation exchange column is regenerated by passing a solution of ____________ |
| A. | Dil. HCl |
| B. | Dil. NaCl |
| C. | Conc. HCl |
| D. | Conc. NaCl |
| Answer» B. Dil. NaCl | |
| 105. |
Ws = Wsp + WssWhat 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 | |
| 106. |
Who is responsible for the clean-up of oil spill? |
| A. | HWS |
| B. | APS |
| C. | Oil Pollution Act |
| D. | SARA |
| Answer» D. SARA | |
| 107. |
In a flowing stream, the breakdown of degradable wastes by bacteria ________ dissolved oxygen. |
| A. | Increases |
| B. | Depletes |
| C. | Maintains |
| D. | Improves |
| Answer» C. Maintains | |
| 108. |
The color of the natural zeolite is ____________ |
| A. | Green |
| B. | Grey |
| C. | Black |
| D. | Blue |
| Answer» B. Grey | |
| 109. |
What is the average ozone concentration created during Ozonation? |
| A. | 1000 mg/l |
| B. | 5000 mg/l |
| C. | 10000 mg/l |
| D. | 15000 mg/l |
| Answer» D. 15000 mg/l | |
| 110. |
__________ requires EPA to establish regulations to protect human health from contaminants presentin drinking water. |
| A. | SAWD |
| B. | SDWA |
| C. | ASAW |
| D. | SWSA |
| Answer» C. ASAW | |
| 111. |
Which of the following ion get released from the anion exchange column? |
| A. | CO3-2 |
| B. | OH– |
| C. | Cl– |
| D. | SO4-2 |
| Answer» C. Cl– | |
| 112. |
SBR operates as ________ process. |
| A. | Batch |
| B. | Continuous |
| C. | Semi-continuous |
| D. | Discontinuous |
| Answer» B. Continuous | |
| 113. |
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. | |
| 114. |
Season-cracking can be prevented by cold-working of brass at _________ |
| A. | 15oC |
| B. | 100oC |
| C. | 300oC |
| D. | 550oC |
| Answer» D. 550oC | |
| 115. |
Ion-free water coming out from the exchanger is known as ____________ |
| A. | Potable water |
| B. | Disinfected water |
| C. | Coagulated water |
| D. | Demineralised water |
| Answer» E. | |
| 116. |
Zeolites are complex compound of ____________ |
| A. | Aluminium and lime |
| B. | Silica and soda |
| C. | Aluminium, silica and soda |
| D. | Lime and soda |
| Answer» D. Lime and soda | |
| 117. |
The phenomenon during which the boiler material becomes brittle due to accumulation of causticsubstances is known as ___________ |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» E. | |
| 118. |
How much chromium is required to provide oxidation resistance for use over 1000oC? |
| A. | 1% |
| B. | 6% |
| C. | 12% |
| D. | 17% |
| Answer» E. | |
| 119. |
The Clean Water Act (CWA) regulates __________ |
| A. | Discharge of pollutants into the waters of the United States |
| B. | Discharge of pollutants into the waters of the United Kingdom |
| C. | Discharge of pollutants into the air of the United States |
| D. | Discharge of pollutants into the waters of India |
| Answer» B. Discharge of pollutants into the waters of the United Kingdom | |
| 120. |
Foaming is caused by the formation of ___________ |
| A. | Acids |
| B. | Alcohols |
| C. | Oils and alkalis |
| D. | Ketones |
| Answer» D. Ketones | |
| 121. |
The permissible dose of chloride in domestic sewage is __________ |
| A. | 120ppm |
| B. | 10ppm |
| C. | 1ppm |
| D. | 250ppm |
| Answer» B. 10ppm | |
| 122. |
What is the objective of water quality management? |
| A. | Control the discharge of pollutants |
| B. | Pollutants are discharged into flowing streams |
| C. | Selective pollutants are released |
| D. | Only highly toxic pollutants are released |
| Answer» B. Pollutants are discharged into flowing streams | |
| 123. |
Ion-exchange resin is ____________ |
| A. | Linear |
| B. | Low molecular weight |
| C. | Organic polymer with porous structure |
| D. | Soluble |
| Answer» D. Soluble | |
| 124. |
What does SBR stand for? |
| A. | Secondary batch reactor |
| B. | Sequential biological reactor |
| C. | Secondary biological reactor |
| D. | Sequential batch reactor |
| Answer» E. | |
| 125. |
The decomposition of the matter produces into ___________ and in presence of ____________ |
| A. | Carbondioxide and oxygen |
| B. | Oxygen and nitrogen |
| C. | Nitrogen and carbondioxide |
| D. | Nitrogen and chlorine |
| Answer» B. Oxygen and nitrogen | |
| 126. |
The effective size of sand of the slow sand filter is __________ |
| A. | 0.1-0.2mm |
| B. | 0.2-0.3mm |
| C. | 0.4-0.7mm |
| D. | 1-2mm |
| Answer» C. 0.4-0.7mm | |
| 127. |
The secondary clarifiers are ________ |
| A. | Circular |
| B. | Rectangular |
| C. | Square |
| D. | Triangular |
| Answer» B. Rectangular | |
| 128. |
The chemical formula of Permutit is ____________ |
| A. | SiOAl2O3Na2O |
| B. | SiO2Al2O3Na2O |
| C. | SiO2Al2O3NaO |
| D. | SiO3Al2O3Na2O |
| Answer» C. SiO2Al2O3NaO | |
| 129. |
The uniformity characteristics of sand expressed in terms of __________ |
| A. | Effective size |
| B. | Effective size and uniformity coefficient |
| C. | Uniformity coefficient |
| D. | Mean velocity |
| Answer» C. Uniformity coefficient | |
| 130. |
Section __________ of CWA regulates discharges of hazardous substances. |
| A. | 311(b)(2)(B) |
| B. | 311(b)(2)(A) |
| C. | 312(b)(2)(A) |
| D. | 311(b)(1)(A) |
| Answer» C. 312(b)(2)(A) | |
| 131. |
The maximum quantity of dissolved oxygen present in wastewater is called __________ |
| A. | Saturated dissolved oxygen |
| B. | Maximum dissolved oxygen |
| C. | Optimal dissolved oxygen |
| D. | Peak dissolved oxygen |
| Answer» B. Maximum dissolved oxygen | |
| 132. |
What is the maximum time required for ozone degradation? |
| A. | 15 minutes |
| B. | 30 minutes |
| C. | 45 minutes |
| D. | 60 minutes |
| Answer» C. 45 minutes | |
| 133. |
The propulsion of water into steam drum by extremely rapid, almost explosive boiling of water at theheating surface is called ___________ |
| A. | Foaming |
| B. | Priming |
| C. | Corrosion |
| D. | Caustic embrittlement |
| Answer» C. Corrosion | |
| 134. |
The impact of pollution depends upon nature of the pollutants and the ___________ |
| A. | Toxic contaminants |
| B. | Season |
| C. | Contaminants |
| D. | Characteristics of river |
| Answer» E. | |
| 135. |
Fluorex is a special mixture of ____________ |
| A. | Di-calcium phosphate and carbon |
| B. | Tri-calcium phosphate and hydroxyapatite |
| C. | Di-calcium phosphate and phosphoric acid |
| D. | Tri-calcium phosphate and carbon |
| Answer» C. Di-calcium phosphate and phosphoric acid | |
| 136. |
Dezincification of brass is prevented by addition of ________ |
| A. | Nickel |
| B. | Zinc |
| C. | Arsenic |
| D. | Tungsten |
| Answer» D. Tungsten | |
| 137. |
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 | |
| 138. |
% chromium mixed with ______ can be used up to 1100oC. |
| A. | Nickel |
| B. | Chromium |
| C. | Aluminum |
| D. | Silicon |
| Answer» B. Chromium | |
| 139. |
Which of the following is not correct regarding Ozonation? |
| A. | Does not requires chemicals |
| B. | Eliminates bad taste |
| C. | Eliminates odour |
| D. | Operational costs are low |
| Answer» E. | |
| 140. |
On how many conditions does the intervention of wastewater depend on? |
| A. | 5 |
| B. | 7 |
| C. | 6 |
| D. | 4 |
| Answer» C. 6 | |
| 141. |
In the concept of self purification of natural streams, complete the following phrase. Solution topollution is _________ |
| A. | Control |
| B. | Dilution |
| C. | Reuse |
| D. | Recycle |
| Answer» C. Reuse | |
| 142. |
_______ provides the dual purpose of providing DO and mixing of the mixed liquor and wastewater. |
| A. | Flocculation |
| B. | Aeration |
| C. | Sedimentation |
| D. | Clarification |
| Answer» C. Sedimentation | |
| 143. |
What is the percentage of aerobically digested sludge? |
| A. | 0.2-0.5 |
| B. | 0.3-0.6 |
| C. | 1.0-2.0 |
| D. | 1.5-3.0 |
| Answer» D. 1.5-3.0 | |
| 144. |
The term ‘Sullage’ refers to: |
| A. | Fresh wastewater |
| B. | Septic wastewater |
| C. | Wastewater from kitchen, laundry |
| D. | Toxic wastewater |
| Answer» D. Toxic wastewater | |
| 145. |
Greenhouse effect is |
| A. | Painting house green in colour |
| B. | Wearing green colour dress |
| C. | Having green room in the house |
| D. | Sun’s heat is trapped and not allowed to |
| Answer» E. | |
| 146. |
Smog = a |
| A. | Smoke in dog’s stomach |
| B. | Smoke + fog |
| C. | Smoke dog |
| D. | frog in fog |
| Answer» C. Smoke dog | |
| 147. |
Van Mahotsav is |
| A. | Planting trees in January |
| B. | Cutting trees in January |
| C. | Cutting trees in July |
| D. | Planting trees in July |
| Answer» E. | |
| 148. |
Greenhouse gases includes |
| A. | CO2, Methane, Nitrous oxide |
| B. | CO2, Argon, Nitrous oxide |
| C. | CO2, Methane, Chlorine |
| D. | CO2, Methane, Flourine |
| Answer» B. CO2, Argon, Nitrous oxide | |
| 149. |
Marble cancer is caused by |
| A. | bacteria |
| B. | virus |
| C. | Acid rain |
| D. | Alkali rain |
| Answer» D. Alkali rain | |
| 150. |
Ganga Action Plan is associated with |
| A. | Increase of fish culture in the Ganges |
| B. | Reduce Ganga water pollution |
| C. | Construct more bridges over the Ganges |
| D. | Increase water transport on the Ganges |
| Answer» C. Construct more bridges over the Ganges | |