McqMate
| 1. |
___________ poisoning water in Japan is from fishes. |
| A. | Bismuth |
| B. | Arsenic |
| C. | Antimony |
| D. | Palladium |
| Answer» B. Arsenic | |
| 2. |
Fishes can store more quantity of ___________ in their bodies. |
| A. | Mercury |
| B. | Bismuth |
| C. | Palladium |
| D. | Chlorine |
| Answer» A. Mercury | |
| 3. |
Waste water released from _________ are not the sources of bacteria. |
| A. | Sanitaria |
| B. | Municipalities |
| C. | Tanning |
| D. | Industries |
| Answer» D. Industries | |
| 4. |
Bacteria and micro organisms present in the water will cause _________ in human and animals. |
| A. | Indigestion |
| B. | Intestinal tract |
| C. | Brain tumour |
| D. | Cancer |
| Answer» B. Intestinal tract | |
| 5. |
Infectious hepatitis is caused by ___________ |
| A. | Bacteria |
| B. | Viruses |
| C. | Protozoa |
| D. | Helminth |
| Answer» B. Viruses | |
| 6. |
Amoebic dysentery is caused by ___________ |
| A. | Viruses |
| B. | Bacteria |
| C. | Helminth |
| D. | Protozoa |
| Answer» D. Protozoa | |
| 7. |
Bacteria in water causes ________ |
| A. | Malaria |
| B. | Typhoid |
| C. | Dengue |
| D. | Chicken guinea |
| Answer» B. Typhoid | |
| 8. |
Helminth in the water causes __________ |
| A. | Hook worm |
| B. | Amoebic dysentery |
| C. | Cholera |
| D. | Typhoid |
| Answer» A. Hook worm | |
| 9. |
The ____________ is an important requirement of the aquatic life. |
| A. | Dissolved nitrogen |
| B. | Dissolved chlorine |
| C. | Dissolved oxygen |
| D. | Dissolved methane |
| Answer» C. Dissolved oxygen | |
| 10. |
The optimum value in natural water is ________ |
| A. | 2-4ppm |
| B. | 4-7ppm |
| C. | 4-6ppm |
| D. | 2-7ppm |
| Answer» C. 4-6ppm | |
| 11. |
What is the full form of BOD? |
| A. | Biochemical oxygen demand |
| B. | Biological oxygen demand |
| C. | Biometric oxygen deep water |
| D. | Biological oxygen deep water |
| Answer» A. Biochemical oxygen demand | |
| 12. |
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» C. Oxygen depletion | |
| 13. |
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» A. Carbondioxide and oxygen | |
| 14. |
The organic matter present in the water is of __________ types. |
| A. | Two |
| B. | Three |
| C. | Four |
| D. | Five |
| Answer» A. Two | |
| 15. |
The temperature of sewage increases. What will be the effect on the dissolved oxygen in sewage? |
| A. | Remains constant |
| B. | Increase |
| C. | Decrease |
| D. | No effect |
| Answer» C. Decrease | |
| 16. |
What is the minimum quantity of dissolved oxygen that should be present in the treated sewage? |
| A. | 6ppm |
| B. | 4ppm |
| C. | 1ppm |
| D. | 10ppm |
| Answer» B. 4ppm | |
| 17. |
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» D. Albuminoid nitrogen | |
| 18. |
The presence of free ammonia in sewage represents ____________ |
| A. | Air pollution |
| B. | Old pollution |
| C. | Recent pollution |
| D. | Water pollution |
| Answer» C. Recent pollution | |
| 19. |
Which chemical is used for the titration of waste water for finding its chloride content? |
| A. | Potassium chloride |
| B. | Sodium chloride |
| C. | Potassium chromate |
| D. | Potassium dichromate |
| Answer» C. Potassium chromate | |
| 20. |
The type of solids which floats in sewage is __________ |
| A. | Suspended solids |
| B. | Settleable solids |
| C. | Dissolved solids |
| D. | Total solids |
| Answer» A. Suspended solids | |
| 21. |
The presence of which of the following indicates old pollution? |
| A. | Nitrates |
| B. | Nitrites |
| C. | H2S |
| D. | Sulfates |
| Answer» D. Sulfates | |
| 22. |
________ is used to find the D.O content of sewage. |
| A. | Winkler method |
| B. | Chromatography |
| C. | Kjeldahl method |
| D. | Olfactometer |
| Answer» B. Chromatography | |
| 23. |
The permissible dose of chloride in domestic sewage is __________ |
| A. | 120ppm |
| B. | 10ppm |
| C. | 1ppm |
| D. | 250ppm |
| Answer» A. 120ppm | |
| 24. |
Imhoff cone is used to measure the _______ |
| A. | Suspended solids |
| B. | Settleable solids |
| C. | Dissolved solids |
| D. | Total solids |
| Answer» B. Settleable solids | |
| 25. |
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» D. H2S | |
| 26. |
Which of the following disease is caused due to lack of nitrates? |
| A. | Diphtheria |
| B. | Methemoglobinemia |
| C. | Tuberculosis |
| D. | Meningitis |
| Answer» B. Methemoglobinemia | |
| 27. |
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» A. Saturated dissolved oxygen | |
| 28. |
Identify the odd one of the following. |
| A. | Fatty acids |
| B. | Chlorides |
| C. | Cellulose |
| D. | Fats |
| Answer» B. Chlorides | |
| 29. |
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» A. Discharge of pollutants into the waters of the United States | |
| 30. |
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» B. 311(b)(2)(A) | |
| 31. |
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» D. 1948 | |
| 32. |
The CWA reduced the amount of pollution from _________ |
| A. | Point sources |
| B. | Non-point sources |
| C. | Chemicals |
| D. | Mining |
| Answer» A. Point sources | |
| 33. |
The discharge of regulated chemicals into surface waters is controlled by __________ |
| A. | SARA |
| B. | CERCLA |
| C. | NPDES |
| D. | PDAC |
| Answer» C. NPDES | |
| 34. |
The maximum amount of pollution that each waterway could absorb is known as _________ |
| A. | TMDL |
| B. | TSML |
| C. | TDSML |
| D. | TDS |
| Answer» A. TMDL | |
| 35. |
__________ requires EPA to establish regulations to protect human health from contaminants present in drinking water. |
| A. | SAWD |
| B. | SDWA |
| C. | ASAW |
| D. | SWSA |
| Answer» B. SDWA | |
| 36. |
Who is responsible for the clean-up of oil spill? |
| A. | HWS |
| B. | APS |
| C. | Oil Pollution Act |
| D. | SARA |
| Answer» C. Oil Pollution Act | |
| 37. |
Which section of CWA regulates land disposal of sludge? |
| A. | Section 402 |
| B. | Section 403 |
| C. | Section 404 |
| D. | Section 405 |
| Answer» D. Section 405 | |
| 38. |
Which CWA program controls water pollution by regulating point sources? |
| A. | SPCC |
| B. | PCC |
| C. | NPDES |
| D. | PDA |
| Answer» C. NPDES | |
| 39. |
Which section of CWA is responsible for monitoring of wetlands? |
| A. | Section 402 |
| B. | Section 403 |
| C. | Section 404 |
| D. | Section 405 |
| Answer» C. Section 404 | |
| 40. |
Which CWA program manages non-point source pollution? |
| A. | NPSMP |
| B. | NSPPP |
| C. | NSGOP |
| D. | NPSRA |
| Answer» A. NPSMP | |
| 41. |
When did CWA come into existence? |
| A. | 1970 |
| B. | 1971 |
| C. | 1972 |
| D. | 1973 |
| Answer» C. 1972 | |
| 42. |
Which of the following is the physical monitoring of the lake? |
| A. | PH |
| B. | COD |
| C. | BOD |
| D. | Turbidity |
| Answer» D. Turbidity | |
| 43. |
Conductivity comes under the ___________ monitoring of the lake. |
| A. | Physical |
| B. | Chemical |
| C. | Biological |
| D. | Organic |
| Answer» A. Physical | |
| 44. |
____________ comes under the chemical monitoring of the lake. |
| A. | Detergents |
| B. | Pathogens |
| C. | Conductivity |
| D. | Turbidity |
| Answer» A. Detergents | |
| 45. |
Pollution enters into the water system in ___________ ways. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 46. |
A large amount of soil can move with the run off called ___________ |
| A. | Soil erosion |
| B. | Soil conservation |
| C. | Soil pollution |
| D. | Soil moving |
| Answer» A. Soil erosion | |
| 47. |
What is the full form of GAP? |
| A. | Ganga action pre distribution |
| B. | Ganga action plan |
| C. | Ganga affected plan |
| D. | Ganga affected pre distribution |
| Answer» B. Ganga action plan | |
| 48. |
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» D. 174 | |
| 49. |
Coastal water shows major differences in ___________ |
| A. | Pollution |
| B. | Sewage |
| C. | Salinity |
| D. | Conductivity |
| Answer» C. Salinity | |
| 50. |
Monitoring systems can be carried out by using __________ |
| A. | Motors |
| B. | Automatic sensors |
| C. | Automatic motors |
| D. | Turbines |
| Answer» B. Automatic sensors | |
| 51. |
Control of river pollution can be done by providing the extra ___________ during dry season. |
| A. | Water |
| B. | Nitrogen |
| C. | Carbondioxide |
| D. | Oxygen |
| Answer» D. Oxygen | |
| 52. |
Determination of flow increase is used for the monitoring of ___________ |
| A. | sea pollution |
| B. | River pollution |
| C. | Lake pollution |
| D. | Tank pollution |
| Answer» B. River pollution | |
| 53. |
which of the following does not include in the monitoring of river pollution? |
| A. | Assessing the immediate water quality |
| B. | Development activities in the region |
| C. | Determination of flow increase |
| D. | Colour of the water |
| Answer» D. Colour of the water | |
| 54. |
Which one of the following is the basic indicator of river health? |
| A. | BOD |
| B. | COD |
| C. | DO |
| D. | ThOD |
| Answer» C. DO | |
| 55. |
What is the minimum amount of DO required for the life survival of aquatic animals? |
| A. | 10 mg/l |
| B. | 5 mg/l |
| C. | 2 mg/l |
| D. | 1 mg/l |
| Answer» C. 2 mg/l | |
| 56. |
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» B. Dilution | |
| 57. |
_________ 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» A. Gas transfer | |
| 58. |
On which of the following does the self purification process does not depend? |
| A. | Volume |
| B. | Flow rate |
| C. | Temperature |
| D. | Aquatic species |
| Answer» D. Aquatic species | |
| 59. |
In a flowing stream, the breakdown of degradable wastes by bacteria ________ dissolved oxygen. |
| A. | Increases |
| B. | Depletes |
| C. | Maintains |
| D. | Improves |
| Answer» B. Depletes | |
| 60. |
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» A. Control the discharge of pollutants | |
| 61. |
The impact of pollution depends upon nature of the pollutants and the ___________ |
| A. | Toxic contaminants |
| B. | Season |
| C. | Contaminants |
| D. | Characteristics of river |
| Answer» D. Characteristics of river | |
| 62. |
Which of the following sewerage systems carry domestic and industrial wastewater? |
| A. | sanitary sewers |
| B. | storm sewers |
| C. | combined sewers |
| D. | storm and combined sewers |
| Answer» A. sanitary sewers | |
| 63. |
Which of the following is a strict anaerobe? |
| A. | Enterobacter |
| B. | Alcaligenes |
| C. | Pseudomonas |
| D. | Methanosarcina |
| Answer» D. Methanosarcina | |
| 64. |
In which of the following treatment involve oxidation of organic constituents of the wastewater? |
| A. | Primary treatment |
| B. | Secondary treatment |
| C. | Advanced treatment |
| D. | Final treatment |
| Answer» B. Secondary treatment | |
| 65. |
The upper region of the trickling filter is favorable for the growth of _____________ |
| A. | fungi |
| B. | protozoa |
| C. | algae |
| D. | bacteria |
| Answer» C. algae | |
| 66. |
Activated sludge usually employs an aeration period of ________________ |
| A. | 1 hour |
| B. | 24 hours |
| C. | 10-15 hours |
| D. | 4-8 hours |
| Answer» D. 4-8 hours | |
| 67. |
Trickling filter is used in which of the following wastewater treatment processes? |
| A. | Primary treatment |
| B. | Secondary treatment |
| C. | Advanced treatment |
| D. | Final treatment |
| Answer» B. Secondary treatment | |
| 68. |
Belt filter presses are used in which of the following process? |
| A. | Thickening |
| B. | Stabilization |
| C. | Dewatering |
| D. | Disposal |
| Answer» C. Dewatering | |
| 69. |
Which of the following gases are produced in large amounts during sludge digestion? |
| A. | methane |
| B. | carbon-dioxide |
| C. | hydrogen |
| D. | nitrogen |
| Answer» A. methane | |
| 70. |
Biological process is used to remove _______ |
| A. | Settleable solids |
| B. | Volatile solids |
| C. | Dissolved solids |
| D. | Colloids |
| Answer» C. Dissolved solids | |
| 71. |
What is the wastewater called as after physical and biological removal of solids? |
| A. | Primary effluent |
| B. | Primary treated water |
| C. | Secondary treated water |
| D. | Secondary treated wastewater |
| Answer» D. Secondary treated wastewater | |
| 72. |
What is the monthly concentration of solids produced by secondary sewage effluent? |
| A. | 20 mg/l |
| B. | 30 mg/l |
| C. | 40 mg/l |
| D. | 35 mg/l |
| Answer» B. 30 mg/l | |
| 73. |
What is the expected BOD removal after both primary and secondary treatment? |
| A. | 90% |
| B. | 85% |
| C. | 80% |
| D. | 75% |
| Answer» B. 85% | |
| 74. |
What is the percentage removal of BOD by stabilization ponds? |
| A. | 20% |
| B. | 45% |
| C. | 65% |
| D. | 95% |
| Answer» C. 65% | |
| 75. |
Which of these is not an advantage of a trickling filter? |
| A. | Temperature |
| B. | Construction cost |
| C. | Oxygen delivery |
| D. | Electric systems |
| Answer» A. Temperature | |
| 76. |
The secondary clarifiers are ________ |
| A. | Circular |
| B. | Rectangular |
| C. | Square |
| D. | Triangular |
| Answer» A. Circular | |
| 77. |
Which of the following is not commonly used as a filter material in the treatment of water? |
| A. | Sand |
| B. | Anthracite |
| C. | Crushed rock |
| D. | Garnet sand |
| Answer» C. Crushed rock | |
| 78. |
Which of the following is correct regarding the cheapest filter material used in water treatment? |
| A. | Sand>Anthracite>Garnet sand |
| B. | SandGarnet sand |
| C. | Sand |
| D. | Sand=Anthracite>Garnet sand |
| Answer» A. Sand>Anthracite>Garnet sand | |
| 79. |
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» B. Effective size and uniformity coefficient | |
| 80. |
____ represents the size of sand particle such that 10% of particles are finer than this size. |
| A. | D0.1 |
| B. | D1 |
| C. | D10 |
| D. | D100 |
| Answer» C. D10 | |
| 81. |
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» C. Uniformity coefficient | |
| 82. |
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» B. 0.2-0.3mm | |
| 83. |
What is the value of specific gravity of sand filter? |
| A. | 2 |
| B. | 2.6 |
| C. | 3.1 |
| D. | 3.5 |
| Answer» B. 2.6 | |
| 84. |
The value of uniformity coefficient for uniformly graded sand is ______ |
| A. | 0 |
| B. | 1 |
| C. | 10 |
| D. | 100 |
| Answer» B. 1 | |
| 85. |
The value of specific gravity for Garnet sand is ____ |
| A. | 2.1 |
| B. | 3.6 |
| C. | 4.2 |
| D. | 5.1 |
| Answer» C. 4.2 | |
| 86. |
Which of the following statement is correct? |
| A. | Ignition loss of filter should not exceed 3% |
| B. | Wearing loss of filter sand should not exceed 5% |
| C. | The range of CU for the slow sand filter is 3-5 |
| D. | The range of CU for the rapid sand filter is 3-5 |
| Answer» C. The range of CU for the slow sand filter is 3-5 | |
| 87. |
In which process of water softening, ion exchange phenomenon takes place? |
| A. | Lime soda process |
| B. | Zeolite process |
| C. | Boiling |
| D. | Demineralization process |
| Answer» B. Zeolite process | |
| 88. |
In which process of water softening, the chemicals are added to remove hardness from water? |
| A. | Lime soda process |
| B. | Zeolite process |
| C. | Boiling |
| D. | Demineralization process |
| Answer» A. Lime soda process | |
| 89. |
Zeolites are complex compound of ____________ |
| A. | Aluminium and lime |
| B. | Silica and soda |
| C. | Aluminium, silica and soda |
| D. | Lime and soda |
| Answer» C. Aluminium, silica and soda | |
| 90. |
The color of the artificial zeolite permutit is ____________ |
| A. | Grey |
| B. | Yellow |
| C. | Green |
| D. | White |
| Answer» D. White | |
| 91. |
Natural zeolite is mainly processed from ____________ |
| A. | White sand |
| B. | Green sand |
| C. | Grey sand |
| D. | Red sand |
| Answer» B. Green sand | |
| 92. |
The color of the natural zeolite is ____________ |
| A. | Green |
| B. | Grey |
| C. | Black |
| D. | Blue |
| Answer» A. Green | |
| 93. |
The chemical formula of Permutit is ____________ |
| A. | SiOAl2O3Na2O |
| B. | SiO2Al2O3Na2O |
| C. | SiO2Al2O3NaO |
| D. | SiO3Al2O3Na2O |
| Answer» B. SiO2Al2O3Na2O | |
| 94. |
Permutit has an exchange value of ________ grams of hardness per m3 of zeolite. |
| A. | 10,000 |
| B. | 20,000-30,000 |
| C. | 35,000-40,000 |
| D. | 40,000-50,000 |
| Answer» C. 35,000-40,000 | |
| 95. |
The thickness of the layers of filter sand of zeolite softener is ____________ |
| A. | 20cm |
| B. | 30cm |
| C. | 40cm |
| D. | 100cm |
| Answer» D. 100cm | |
| 96. |
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» C. Suspended impurities get deposited around the zeolite particles | |
| 97. |
Water is mainly used in boilers for the generation of ________________ |
| A. | Power |
| B. | Electricity |
| C. | Steam |
| D. | Current |
| Answer» C. Steam | |
| 98. |
Which of the following should not be a composition of boiler-feed water? |
| A. | Hardness should be below 0.2ppm |
| B. | Its caustic alkalinity should lie between 0.15 to 0.45 ppm |
| C. | Its soda alkalinity should be 0.45-1 ppm |
| D. | Its caustic alkalinity should be 1.5-2 ppm |
| Answer» D. Its caustic alkalinity should be 1.5-2 ppm | |
| 99. |
Which of the following is not a result of the excess of impurity in boiler-feed? |
| A. | Scale and sludge formation |
| B. | Decomposition |
| C. | Corrosion, priming and foaming |
| D. | Caustic embrittlement |
| Answer» B. Decomposition | |
| 100. |
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» A. Sludges, scale | |
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