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MCQs

Total Questions : 579 | Page 57 of 58 pages
Question 561. Exposure to small amount of ______________ results in high blood pressure & heart disease in human beings?
  1.    Hydrogen sulphide
  2.    Mercury
  3.    Cadmium
  4.    Asbestos
 Discuss Question
Answer: Option C. -> Cadmium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 562. Industrial workers working in leather tanning & manufacturing units are prone to suffer from ___________________?
  1.    Respiratory ailments (e.g. bronchitis)
  2.    Skin diseases (e.g. dermatitis)
  3.    Silicosis
  4.    Blurred vision
 Discuss Question
Answer: Option B. -> Skin diseases (e.g. dermatitis)
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 563. Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?
  1.    Fading of dyes on textiles
  2.    Corrosion, tarnishing & soiling of metals
  3.    Reduced strength of textiles
  4.    All A., B. and C.
 Discuss Question
Answer: Option D. -> All A., B. and C.
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 564. Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by_______________?
  1.    Chlorination
  2.    Treating in biological oxygen pond
  3.    Chemical coagulation
  4.    None of these
 Discuss Question
Answer: Option B. -> Treating in biological oxygen pond
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 565. Which of the following acts as a natural source of air pollution ?
  1.    Forest fire
  2.    Deforestation
  3.    Volcanic eruption
  4.    None of these
 Discuss Question
Answer: Option C. -> Volcanic eruption
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 566. Ionisation potential employed in the industrial electrostatic precipitator is of the order of_______________?
  1.    30 to 70 kV DC
  2.    30 to 70 kV AC
  3.    230 V AC
  4.    230 V DC
 Discuss Question
Answer: Option A. -> 30 to 70 kV DC
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 567. ____________ substances present in sewage are removed in grit chamber during sewage treatment?
  1.    Organic
  2.    Fatty
  3.    Inorganic
  4.    Dissolved
 Discuss Question
Answer: Option C. -> Inorganic
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 568. Maximum allowable concentration of CO2 in air for safe working is _____________ ppm (parts per million)?
  1.    50
  2.    1000
  3.    2000
  4.    5000
 Discuss Question
Answer: Option D. -> 5000
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 569. Presence of excess fluorine in water causes__________________?
  1.    Dental cavity
  2.    Tooth decay
  3.    Fluorosis
  4.    Respiratory disease
 Discuss Question
Answer: Option C. -> Fluorosis
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 570. Dissolved oxygen content in river water is around _____________ ppm?
  1.    5
  2.    100
  3.    250
  4.    500
 Discuss Question
Answer: Option A. -> 5
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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