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MCQs

Total Questions : 579 | Page 1 of 58 pages
Question 1. Main pollutants released from iron & steel industry is
  1.    CO, CO₂ & SO₂.
  2.    H₂S, NO & SO₃.
  3.    CO₂, H₂S & NO₂.
  4.    SO₃, NO₂ & CO₂.
 Discuss Question
Answer: Option A. -> CO, CO₂ & SO₂.
Answer: (a).CO, CO₂ & SO₂.
Question 2. Smoke is produced due to
  1.    insufficient supply of combustion air and insufficient time for combustion.
  2.    poor quality of fuel and improper mixing of fuel & combustion air.
  3.    poor design & overloading of furnace.
  4.    all (a), (b) and (c).
 Discuss Question
Answer: Option D. -> all (a), (b) and (c).
Answer: (d).all (a), (b) and (c).
Question 3. Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm.
  1.    5
  2.    500
  3.    1000
  4.    2000
 Discuss Question
Answer: Option A. -> 5
Answer: (a).5
Question 4. Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
  1.    hydrocarbons
  2.    hydrogen flouride
  3.    hydrogen sulphides
  4.    nitrogen dioxide
 Discuss Question
Answer: Option B. -> hydrogen flouride
Answer: (b).hydrogen flouride
Question 5. Exposure to chemicals having carcinogenic properties cause
  1.    dermatitis (skin disorder)
  2.    cancer
  3.    asphyxiation (suffocation)
  4.    asthma
 Discuss Question
Answer: Option B. -> cancer
Answer: (b).cancer
Question 6. During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
  1.    Idle running
  2.    Acceleration
  3.    Cruising
  4.    Deaccelaration
 Discuss Question
Answer: Option A. -> Idle running
Answer: (a).Idle running
Question 7. H₂S present in gaseous stream can be removed by adsorption on
  1.    silica gel
  2.    active carbon
  3.    bog iron
  4.    limestone powder
 Discuss Question
Answer: Option C. -> bog iron
Answer: (c).bog iron
Question 8. Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by
  1.    natural aeration of water stream.
  2.    photosynthetic action of algae.
  3.    both (a) & (b).
  4.    neither (a) nor (b).
 Discuss Question
Answer: Option C. -> both (a) & (b).
Answer: (c).both (a) & (b).
Question 9. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
  1.    blood poisoning.
  2.    anaemia.
  3.    nervous system disorder.
  4.    all (a), (b) & (c).
 Discuss Question
Answer: Option D. -> all (a), (b) & (c).
Answer: (d).all (a), (b) & (c).
Question 10. 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.    Reynold stresses
  2.    shear forces
  3.    both (a) & (b)
  4.    neither (a) nor (b)
 Discuss Question
Answer: Option C. -> both (a) & (b)
Answer: (c).both (a) & (b)

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