Discussion
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- Question
Hydrogen ion concentration in distilled water is
Options- A. 10-7
- B. 7 x 10-7
- C. 107
- D. 7 x 107
- Correct Answer
- 10-7
- 1. Noise level inside a jet air liner in normal flight is about __________ decibels.
Options- A. 80
- B. 100
- C. 125
- D. 145 Discuss
- 2. TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
Options- A. 5
- B. 100
- C. 1000
- D. 2000 Discuss
- 3. Inorganic impurities causing water pollution is
Options- A. fats
- B. carbohydrates
- C. salts of metals
- D. protein Discuss
- 4. Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of
Options- A. ozone and iodine.
- B. chlorine or its compounds.
- C. ultraviolet light for irradiation of water.
- D. all (a), (b) & (c). Discuss
- 5. Maximum permissible residual chlorine in treated water should be __________ mg/litre.
Options- A. 0.001 to 0.01
- B. 02 to 0.3
- C. 2 to 3
- D. 5 to 10 Discuss
- 6. Sulphur dioxide present in the industrial chimney exhaust gases causes
Options- A. respiratory & lung disease.
- B. reduction in plant's productivity owing to acid rain.
- C. corrosion of building materials.
- D. all (a), (b) and (c). Discuss
- 7. __________ content of the phosphate rock is the pollutant of primary interest in a phos-phatic fertiliser plant.
Options- A. Calcium
- B. Fluorine
- C. Phosphorous
- D. Sulphur Discuss
- 8. During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
Options- A. filtration
- B. digestion
- C. sedimentation
- D. both (b) and (c) Discuss
- 9. __________ is the process of killing organism in water.
Options- A. Coagulation
- B. Sterilisation
- C. Disinfection
- D. Sedimentation Discuss
- 10. Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (? g)/litre.
Options- A. 2
- B. 42
- C. 332
- D. 1050 Discuss
Environmental Engineering problems
Search Results
Correct Answer: 100
Correct Answer: 5
Correct Answer: salts of metals
Correct Answer: all (a), (b) & (c).
Correct Answer: 02 to 0.3
Correct Answer: all (a), (b) and (c).
Correct Answer: Fluorine
Correct Answer: both (b) and (c)
Correct Answer: Disinfection
Correct Answer: 42
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