Quiznetik
Environmental Engineering | Set 4
1. In case of public supplies, the maximum permissible nitrite content is
A. 250 ppm
B. 200 ppm
C. 100 ppm
D. 50 ppm
E. zero ppm
Correct : E. zero ppm
2. All of the following are pesticides EXCEPT
A. Aldrin
B. Endrin
C. Chloroform
D. BHC
E. None of the above
Correct : C. Chloroform
3. The presence of which of the following material in water is not considered to be dangerous?
A. Lead
B. Copper
C. Mercury
D. Calcium
E. Zinc
Correct : D. Calcium
4. The desirable temperature of portable water is
A. zero degree centigrade
B. 10?C
C. 20?C
D. 27?C
E. 37?C
Correct : B. 10?C
5. Turbidity of water is usually measured in terms of
A. Platinum scale
B. Cobalt scale
C. Silica scale
D. Calcium scale
E. Sodium scale
Correct : C. Silica scale
6. Black holes are celestial bodies which
A. Are self luminous bodies
B. Do not allow any light to escape outside
C. Green
D. Have strong electrical field
E. Have strong magentic field
Correct : B. Do not allow any light to escape outside
7. Which of the following is used in the recently developed technology for communication?
A. Optical fibre
B. Glass fibre
C. Quartz fibre
D. None of these
E. Nylon fibre
Correct : A. Optical fibre
8. Disinfection of water is done by
A. Alum
B. Filtration
C. Heating and cooling
D. Ozone
E. Passing chlorine
Correct : E. Passing chlorine
9. The maximum concentration of lead in drinking water should not exceed.
A. 0.5 mg/litre
B. 0.0005 mg/litre
C. 5 mg/litre
D. 0.005 mg/litre
E. 0.05 mg/litre
Correct : E. 0.05 mg/litre
10. In power plant an electrostatic precipitators is installed between
A. Furnace and chimney
B. Induced draft fan and forced draft fan
C. Forced draft fan and furnace
D. Primary air and secondary air
E. Air preheater and water treatment plant
Correct : A. Furnace and chimney
11. The aeration of water is done for the removal of
A. Odour
B. Turbidity
C. Hardness
D. Colour
E. Bacteria
Correct : A. Odour
12. The method used for the removal of fine suspended particle is
A. Flotation
B. Screening
C. Filtration
D. Agitation
E. Aeration
Correct : C. Filtration
13. Which of the following industry will usually have the highest concumption of water for processing?
A. Foundry
B. Aluminium industry
C. Automobile industry
D. Steel plant
E. Paper mill
Correct : E. Paper mill
14. The presence of fluorides in drinking water helps in
A. Preventing decaying of teeth
B. Purification of water
C. Reduces fungi formation
D. Killing aerobic bacteria
E. Deodourisation of water
Correct : A. Preventing decaying of teeth
15. The science of poisons - their effects, antidotes and detection, is known as
A. Toxicology
B. Poisonology
C. Minerology
D. Hermetilogy
E. Petrology
Correct : A. Toxicology
16. Which thermometer is used to indicate the lowest temperature?
A. Liquid thermometer
B. Alcohol thermometer
C. Green
D. Resistance thermometer
E. Clinical thermometer
Correct : B. Alcohol thermometer
17. For controlling the growth of algae, the chemical generally used is
A. Bleaching powder
B. Lime
C. Ozone
D. Copper sulphate
E. Alum
Correct : D. Copper sulphate
18. The flouride content in the drinking water should not exceed
A. 200 mg/litre
B. 150 mg/litre
C. 100 mg/litre50 mg/litre
D. 1 mg/litre
E. 50 mg/litre
Correct : D. 1 mg/litre
19. The discharge of hydrocarbons from automobile exhaust is maximum when the vehicle is
A. Cruising at low speeds
B. Idling
C. Decelerating
D. Cruising at high speeds
E. Accelerating
Correct : B. Idling
20. Lead poisoning occurs when the lead content in water is
A. 30 - 50 ppm
B. 300 - 500 ppm
C. 10 - 15 ppm
D. 3 - 5 ppm
E. 0.3 - 0.5 ppm
Correct : E. 0.3 - 0.5 ppm
21. Which of the following units measures the memory of the Computer?
A. Bits
B. None of these
C. Volts
D. Amperes
E. Ohms
Correct : A. Bits
22. The atmosphere gets heated up mainly by
A. Radiation from the earth's surface
B. Radiogenic heat
C. Heat of the earth's interior
D. Direct sun-rays
E. None of these
Correct : A. Radiation from the earth's surface
23. The ratio activity of water due to Strontium can be removed by
A. Phosphate coagulation
B. Lime
C. Lime - Soda solution
D. Alum coagulation
E. Aeration
Correct : A. Phosphate coagulation
24. Which of the following plant is highly sensitive to mercury vapour?
A. Sarcococca
B. Sunflower
C. Ivy
D. Cherry
E. Aloc
Correct : B. Sunflower
25. The emission of carbon monoxide in automobile exhaust will be low when the vehicle is
A. Idling
B. Cruising at low speed
C. Cruising at high speed
D. Decelerating
E. Accelerating
Correct : C. Cruising at high speed
26. For removal of temporary hardness of water
A. Water is filtered
B. Chlorine is passed through water
C. Alum is added to water
D. Water is boiled
E. Lime is added to water
Correct : C. Alum is added to water
27. The total count of bacteria in portable water should not exceed
A. 5000 per c.c.
B. 998 per c.c.
C. 1 mg/litre
D. 10,000 per c.c.
E. 10 per c.c.
Correct : E. 10 per c.c.
28. A blue smoke from a diesel engine indicates presence of
A. Unburnt carbon
B. Carbon monoxide
C. Unburnt oil
D. Nitrous oxide
E. Carbon dioxide
Correct : C. Unburnt oil
29. For portable water the permissible pH value is
A. 11 -- 14
B. 7 - 8.5
C. 4.5 - 7
D. 9 -- 11
E. 1 - 4.5
Correct : B. 7 - 8.5
30. Which of the following is the major source of environmental pollution in urban areas?
A. Rolling mills
B. Automobiles
C. Electronic industries
D. Power plants
E. Floor mills
Correct : B. Automobiles
31. Which of the following is considered as the noble gas?
A. None of these
B. Hydrogen
C. Argon
D. Ozone
E. Oxygen
Correct : C. Argon
32. Which of the following is an artificial source of energy?
A. Wood
B. Electricity
C. Sun
D. None of these
E. Coal
Correct : B. Electricity
33. The hardness of soft water (in ppm) is
A. 0 - 50
B. 200 - 350
C. 50 - 150
D. 375 - 500
E. 500 - 1000
Correct : A. 0 - 50
34. The process of removal of permanent hardness of water is
A. Filtration process
B. Zeolite process
C. Sedimentation process
D. Lime process
E. Boiling process
Correct : B. Zeolite process
35. Which of the following measures the heat of combustion?
A. Beckmann's thermometer
B. Thermostat
C. Green
D. Refrigerator
E. Bomb's calorimeter
Correct : E. Bomb's calorimeter
36. For the maximum alkalinity of water, the pH value would be
A. 7
B. Zero
C. 8
D. 20
E. 14
Correct : E. 14
37. Zeolite is
A. Hydrated calcium silicate
B. A naturally occurring salt
C. Hydread silica
D. Hydrated alumino-silicate
E. Silicon carbide
Correct : D. Hydrated alumino-silicate
38. Which of the following particles will be smallest in size?
A. Smog
B. Drizzle
C. Fog
D. Rain
E. Mist
Correct : A. Smog
39. Thiosulphate is the antidote for the poisonous effect due to
A. Cyanide
B. Lead
C. Organic phosphorous compounds
D. Mercury
E. Arsenic
Correct : A. Cyanide
40. The presence of algae in water indicates that the water is
A. Hard
B. Acidic
C. Soft
D. Pune
E. Free from turbidity
Correct : B. Acidic
41. The maximum permissible turbidity for drinking water
A. 15 - 25 ppm
B. 3 - 50 ppm
C. 30 - 50 ppm
D. 1 - 4 ppm
E. Zero
Correct : A. 15 - 25 ppm
42. Per capita consumption of water is usually taken as
A. 750 - 1000 litres
B. 50 - 100 litres
C. 500 - 750 litres
D. 400 - 500 litres
E. 150 - 300 litres
Correct : E. 150 - 300 litres
43. The most injurious components of automobile exhaust for environment are
A. Green
B. Carbon monoxide and Carbon dioxide
C. Carbon monoxide and lead
D. Carbon dioxide and Sulphur dioxide
E. Ethylene dichloride and ethylene dibromide
Correct : B. Carbon monoxide and Carbon dioxide
44. The main disadvantage of hard water is
A. Increased soap consumption
B. Bad taste
C. Foul smell
D. More turbidity
E. Higher density
Correct : A. Increased soap consumption
45. The maximum permissible level or pesticides, in general, in drinking water is nearly
A. 50 to 100 ppm
B. 1 to 50 ppm
C. 100 to 250 ppm
D. 250 to 500 ppm
E. 500 to 1000 ppm
Correct : B. 1 to 50 ppm
46. The emission of oxides of nitrogen in automobile exhaust will be least when the vehicle is
A. Accelerating
B. Idling
C. Cruising at high speed
D. Cruising at low speed
E. Decelerating
Correct : B. Idling
47. Mottling of teeth is associated with the presence of
A. Fluorides in water
B. Calcium in water
C. Chloride in water
D. Sulphur in water
E. Sodium chloride in water
Correct : A. Fluorides in water
48. Which of the following is the major source of flyash emission?
A. Sintering plants
B. Sulphuric acid plant
C. Power plants
D. Oil refineries
E. Blast furnace
Correct : C. Power plants
49. Theodolite is used by
A. Electronic Engineers
B. Cartrographers
C. None of these
D. Physicists
E. Surveyors
Correct : E. Surveyors
50. Water with least contamination can be be obtained from
A. Lakes
B. Spring along the hill slope
C. Wells
D. Reservoirs
E. Rivers
Correct : B. Spring along the hill slope
51. Which of the following chemical is least poisonous?
A. Mercury
B. Cyanide
C. Arsenic
D. Lead
E. Sodium
Correct : E. Sodium
52. Disinfection of drinking water means removal of
A. Bacteria
B. Colour
C. Odour
D. Turbidity
E. Oxygen
Correct : A. Bacteria
53. The hardness limit for portable water ranges between
A. 10 - 50 ppm
B. 300 - 700 ppm
C. 75 - 117 ppm
D. 150 - 250 ppm
E. 50 - 65 ppm
Correct : C. 75 - 117 ppm
54. The process used for the removal of dissolved carbondioxide from the water, is known as
A. Coagulation
B. Sedimentation
C. Aeration
D. Zeolitc
E. Agitation
Correct : C. Aeration
55. Which of the following automobile will provide least pollution problems
A. Battery powered
B. Petrol engine powered
C. Gas turbine powered
D. Diesel engine powered
E. Wankel engine powered
Correct : A. Battery powered
56. The permissible level of HCN in drinking water is
A. More than 50 mg/litre
B. Around 1 mg/litre
C. Less than 0.01 mg/litre
D. Between 10 to 20 mg/litre
E. Around 5 mg/litre
Correct : C. Less than 0.01 mg/litre
57. The chloride content in the water for public supplies should not exceed
A. 1 mg/litre
B. 250 mg/litre
C. 50 mg/litre
D. 20 mg/litre
E. 100 mg/litre
Correct : B. 250 mg/litre
58. The most frequent method of bacterial reproduction is by
A. The formation of spores
B. Budding
C. Cell division
D. Colony formation
E. Sexual process
Correct : C. Cell division
59. Bit is the unit of
A. Quantity of electricity
B. Intensity of an earthquake
C. None of these
D. Memory of computer
E. Amount of rain recorded
Correct : D. Memory of computer
60. Dark, black smoke from diesel engines usually results when engine is
A. Running at light loads
B. Running at slow speeds
C. Running at full load and full speed
D. Idling
E. Running at full speed but under load conditions
Correct : C. Running at full load and full speed
61. Which one among the following terms best describes the method of converting a spherical surface into a plane surface?
A. Projection
B. Cartography
C. None of these
D. Geodesy
E. Photogrammetry
Correct : A. Projection
62. The permissible hardness of water for public supplies is
A. 400 mg/litre
B. 10 mg/litre
C. 25 mg/litre
D. 75 mg/litre
E. 115 mg/litre
Correct : E. 115 mg/litre
63. What will be the colour of red rose when it is seen through green glass?
A. Pink
B. White
C. Brown
D. Green
E. Black
Correct : C. Brown
64. Identify the incorrect statement if any Zeolite process is suitable for
A. When zeolite becomes inactive, it may be reactivated by flushing with brine solution
B. Removing temporary hardness
C. Removing permanent hardness
D. Acidic waters
E. Cent percent removal of hardness
Correct : D. Acidic waters
65. Which of the following constituent of air has the least percentage?
A. Helium
B. Carbon dioxide
C. Xenon
D. Neon
E. Argon
Correct : C. Xenon
66. If with minimum quantity of potassium permanganate, the pink colour of water disappears soon, then it shows that
A. Water is hard
B. Water is acidic
C. Chlorine content is high in water
D. Water is alkaline
E. Organic matter is present in water
Correct : E. Organic matter is present in water
67. Which one of the following gases shows a different behaviour at high pressure?
A. Ozone
B. Hydrogen
C. Carbon dioxide
D. Water vapours
E. None of these
Correct : B. Hydrogen
68. Bleaching power is
A. Stacked lime
B. Hypo-chloride of lime
C. Chloride of lime
D. Hypo-chlorite of lime
E. Lime
Correct : D. Hypo-chlorite of lime
69. The odour of water is expressed in terms of threshold number. The maximum threshold number permitted for public supplies is
A. 10
B. 1
C. 2
D. 5
E. 3
Correct : E. 3
70. The percentage of nitrogen in air by weight is around
A. 24.3 percent
B. 23.1 percent
C. 65.5 percent
D. 75.5 percent
E. 20.3 percent
Correct : D. 75.5 percent
71. What is a laser?
A. Electro-magnetic waves
B. Light amplification by stimulated emission of radiation
C. Supersonic waves
D. Green
E. Ultrasonic waves
Correct : B. Light amplification by stimulated emission of radiation
72. The permissible hardness of water for low pressure boiler is
A. 150 mg/litre
B. 50 mg/litre
C. 350 kg/litre
D. 250 mg/litre
E. 450 mg/litre
Correct : B. 50 mg/litre
73. To keep the water safe against pathogenetic bacteria the residual chlorine should remain between
A. 10 ppm to 20 ppm
B. 1 ppm to 2 ppm
C. 0.2 to 0.8 ppm
D. 0.05 to 0.2 ppm
E. 6 ppm to 10 ppm
Correct : D. 0.05 to 0.2 ppm
74. Which of the following industry is least polluting?
A. Rolling mills
B. Oil refinery
C. Cement industry
D. Thermal power plants
E. Electronic industry
Correct : E. Electronic industry
75. The pH value of sea water is usually
A. Between 3 and 5
B. 1
C. Between 8 and 8.3
D. Between 13.7 and 14
E. Between 5 and 7
Correct : C. Between 8 and 8.3
76. The pH value of concentrated sulphuric acid could be expected between
A. 6 and 5
B. 7 and 6
C. 1 and 0
D. 4 and 3
E. 3 and 1
Correct : C. 1 and 0
77. Ultra-violet rays are used for the treatment of water known as
A. Dechlorination
B. Aeration
C. Disinfection
D. Filtration
E. Bleaching
Correct : C. Disinfection
78. The process of kolling at the pathogenic bacteria of water-borne diseases to make it safe for hospital use, is known as
A. Zeoliting
B. Debacterialisation
C. Chlorination
D. Aeration
E. Sterilization
Correct : E. Sterilization
79. In one litre sample of drinking water the coliform organism should not exceed
A. 1
B. 100
C. 10
D. 1000
E. 500
Correct : C. 10
80. Turbidity in water may be removed by
A. Aeration
B. Sedimentation
C. Oxidation
D. Filtration
E. Agitation
Correct : B. Sedimentation
81. Which one of the following is not directly related to the phenomenon of evaporation?
A. None of these
B. Temperature of liquid
C. Surface winds over the liquid
D. Volume of the liquid
E. Surface area of the liquid
Correct : D. Volume of the liquid
82. For the maximum acidity of water, pH value would be
A. 0.1
B. 10
C. 1
D. 0.01
E. 11
Correct : D. 0.01
83. The process of passing the water through a thick layer of filtering media is known as
A. Sedimentation
B. Disinfection
C. Putrification
D. Filtration
E. Purification
Correct : D. Filtration
84. In case of public supplies, the maximum permissible nitrite content is
A. 250 ppm
B. 100 ppm
C. 50 ppm
D. 200 ppm
E. zero ppm
Correct : E. zero ppm
85. The presence of which of the following material in water is not considered to be dangerous?
A. Copper
B. Zinc
C. Mercury
D. Calcium
E. Lead
Correct : D. Calcium
86. The desirable temperature of portable water is
A. 10?C
B. 37?C
C. 27?C
D. zero degree centigrade
E. 20?C
Correct : A. 10?C