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Chemical Engineering

Environmental Engineering In Ce MCQs

Practice Environmental Engineering In Ce MCQs for competitive exams.

Environmental Engineering In Ce MCQs

Practice questions from this topic.

Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N 2 in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.

  1. A. 84
  2. B. 88
  3. C. 80
  4. D. 92
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Higher concentration of nitrogen dioxide in atmospheric air causes

  1. A. Cancer
  2. B. Bronchitis
  3. C. Asphyxiation
  4. D. Corrosion
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Presence of excess flourine in water causes

  1. A. Dental cavity
  2. B. Tooth decay
  3. C. Fluorosis
  4. D. Respiratory disease
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Which of the following is not an air pollutant?

  1. A. Ozone
  2. B. Carcinogens
  3. C. Pesticides
  4. D. Metallic powders
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The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant?

  1. A. Chlorine
  2. B. Alkalis
  3. C. Benzene hexachloride
  4. D. Alkyl benzene sulphonate (ABS)
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Radioactive substances present in the polluted water stream can be removed by

  1. A. Biological oxygen treatment
  2. B. Coagulation and filtration
  3. C. Adsorption in ion exchange materials
  4. D. None of these
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TLV of lead for public sewer/waste water is about __________ ppm.

  1. A. 1
  2. B. 25
  3. C. 150
  4. D. 650
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TLV of mercury in potable (drinking) water is about __________ ppm.

  1. A. 0.001
  2. B. 0.1
  3. C. 1
  4. D. 5
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Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to

  1. A. Reynold stresses
  2. B. Shear forces
  3. C. Both A & B
  4. D. Neither A nor B
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A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.

  1. A. 1000 to 2000
  2. B. 3000 to 6000
  3. C. 6000 to 9000
  4. D. 10000 to 100000
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Which of the following is the most detrimental for water used in high pressure boiler?

  1. A. Silica
  2. B. Turbidity
  3. C. Phenol
  4. D. Dissolved oxygen
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Which of the following is not a natural source of air pollution?

  1. A. Volcanic eruptions and lightening discharges
  2. B. Biological decay of vegetable matter
  3. C. Photochemical oxidation of organic matter
  4. D. None of these
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