Engineering :: Environmental Engineering
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81. |
Which of the following constituent of air has the least percentage? |
A. |
Argon |
B. |
Carbon dioxide |
C. |
Xenon |
D. |
Neon |
E. |
Helium |
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Answer: Option C
Explanation:
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82. |
Which of the following is the major source of environmental pollution in urban areas? |
A. |
Rolling mills |
B. |
Power plants |
C. |
Automobiles |
D. |
Floor mills |
E. |
Electronic industries |
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Answer: Option C
Explanation:
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83. |
Which of the following industry is least polluting? |
A. |
Cement industry |
B. |
Oil refinery |
C. |
Thermal power plants |
D. |
Electronic industry |
E. |
Rolling mills |
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Answer: Option D
Explanation:
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84. |
Which of the following is the major source of pollutant hydrogen sulphide? |
A. |
Decaying organic matter |
B. |
Auto exhaust |
C. |
Oil burners |
D. |
Solar energy |
E. |
None of the above |
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Answer: Option A
Explanation:
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85. |
Which of the following is the major source of flyash emission? |
A. |
Sintering plants |
B. |
Oil refineries |
C. |
Blast furnace |
D. |
Power plants |
E. |
Sulphuric acid plant |
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Answer: Option D
Explanation:
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86. |
Which of the following is unlikely to be the pollutant from a sulphuric acid plant? |
A. |
Sulphur dioxide |
B. |
Sulphur trioxide |
C. |
Acid mist |
D. |
Hydrogen sulphide |
E. |
All of the above |
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Answer: Option D
Explanation:
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87. |
In power plant an electrostatic precipitators is installed between |
A. |
Forced draft fan and furnace |
B. |
Furnace and chimney |
C. |
Primary air and secondary air |
D. |
Induced draft fan and forced draft fan |
E. |
Air preheater and water treatment plant |
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Answer: Option B
Explanation:
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88. |
The colour of water is measured |
A. |
In ferms of pH value |
B. |
In terms of degree of hardness |
C. |
In terms of platinum cobalt scale |
D. |
ppm of dissolved solids |
E. |
None of the above |
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Answer: Option C
Explanation:
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89. |
Out of the following metals the least permissible percentage in drinking water is |
Answer: Option A
Explanation:
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90. |
Turbidity of water is usually measured in terms of |
A. |
Sodium scale |
B. |
Silica scale |
C. |
Cobalt scale |
D. |
Platinum scale |
E. |
Calcium scale |
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Answer: Option B
Explanation:
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