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Environmental Engineering Important Past Papers Solved Mcqs

Environmental Engineering MCQs

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Last Updated: 07 Jun 2022


  • Bhopal gas tragedy in 1984 occurred due to leakage of:

A. Methane
B. Methyl Isocyanate (MIC)
C. Carbon Monoxide
D. Hydrochloric Acid


Bhopal Disaster also known as Bhopal Gas Tragedy, was Methyl Isocyanate (MIC) 40 tonnes gas leakage incident on night of 2-3 December 1984 at Union Carbide India Limited Plant (Pesticide plant).

Deaths: 3,787
Location: Bhopal, Madhya Pradesh, India

  • Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of _____ toxic gas.

A. Moderately
B. Highly
C. Extremely
D. Very Extremely


  • Persons working in cement plants and limestone quarries are more prone to disease like:

A. Asthma
B. Silicosis
C. Cancer
D. Siderosis


  • Inhalation of silica dust by human being causes

A. Asphyxiation
B. Shortness of breath
C. Tuberculosis
D. Both (b) & (c)


  • Siderosis is a disease caused by the inhalation of _____dust. 

A. Silica
B. Coal
C. Iron
D. None of above


  • Pneumoconiosis is a disease caused by the inhalation of _____dust. 

A. Iron
B. Silica
C. Uranium ore
D. Coal


  • Workers working in leather tanning & manufacturing units are more prone to disease like:

A. Asthma
B. Dermatitis
C. Cancer
D. Siderosis


  • Workers working in _____ industry are most prone to white lung cancer.

A. Coal mining
B. Limestone mining
C. Textile
D. Asbestos


  • Higher concentration of nitrogen dioxide in atmospheric air causes

A. Cancer
B. Bronchitis
C. Asphyxiation
D. Corrosion


  • Presence of nitrates in water in excess of 50 ppm causes

A. Gastroenteritis
B. Mathenoglobenemia
C. Asphyxiation
D. Tooth decay


  • Main pollutant present in automobile exhaust is

A. CO2
D. Hydrocarbons


  • Inhalation of lead components present in automobile exhaust (using leaded petrol) causes

A. blood poisoning
B. anemia
C. nervous system disorder
D. All of above


  • Fluorosis (a bone disease) is caused by the presence of high concentration of _____ in water and _____ in atmospheric air.

A. hydrocarbons
B. fluorine & hydrogen fluoride
C. hydrogen sulphides
D. nitrogen dioxide


  • Fluorosis is caused due to the presence of excessive amount of _____ in drinking water.

A. Mercury
B. Lead
C. Fluoride
D. Arsenic


  • Presence of a certain minimum quantity of flourine is desirable in potable water to prevent

A. Scale formation
B. Dental cavities
C. Water-borne disease
D. Corrosion


  • Exposure to chemicals having carcinogenic properties cause

A. dermatitis
B. cancer
C. asphyxiation
D. asthma


  • Radioactive solid nuclear wastes are disposed off by

A. high temperature incineration
B. pathological incineration
C. underground burial in concrete containers
D. pyrolysis


  • What are the methods of treatment & disposal of radioactive wastes?

A. Evaporation & chemical precipitation
B. Biological methods & adsorption in ion exchange materials
C. Fixing into a solid mass with cement and sinking deep in the sea.
D. All of above


  • Radioactive substances present in the polluted water stream can be removed by

A. Biological oxygen treatment
B. Coagulation and filtration
C. Adsorption in ion exchange materials
D. None of above


  • Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters?

A. I-131
B. Sr-90
C. Au-198
D. Ra-226


  • Maximum permissible limit of industrial noise as recommended by World Health Organization (WHO) is ___ during day and ___ during night.

A. 35 dB and 40 dB
B. 95 dB and 100 dB
C. 100 dB and 50 dB
D. 75 dB and 70 dB


  • Noise pollution level in a chemical plant is expressed in

A. Roentgen
B. Decibel
C. Hertz
D. None of above


  • Maximum allowable noise exposure limits for a man working for 8 hours a day in a noisy chemical plant is about _____ decibels.

A. 20
B. 60
C. 90
D. 120





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