Discussion
Home ‣ Chemical Engineering ‣ Environmental Engineering Comments
- Question
Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air.
Options- A. hydrocarbons
- B. hydrogen flouride
- C. hydrogen sulphides
- D. nitrogen dioxide
- Correct Answer
- hydrogen flouride
- 1. The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by
Options- A. biological oxygen pond.
- B. aerated lagoons.
- C. trickling filters.
- D. gravity separator having oil skimming devices. Discuss
- 2. Ionisation potential employed in the industrial electrostatic precipitator is of the order of
Options- A. 30 to 70 kV DC
- B. 30 to 70 kV AC
- C. 230 V AC
- D. 230 V DC Discuss
- 3. Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid ilow control. It is caused due to
Options- A. Reynold stresses
- B. shear forces
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 4. TLV of ozone (O3) and phosgene (COCl2) in air is __________ ppm.
Options- A. 0.1
- B. 25
- C. 100
- D. 1000 Discuss
- 5. Turbidity of water is an indication of the presence of
Options- A. suspended inorganic matter
- B. dissolved solids
- C. floating solids
- D. dissolved gases Discuss
- 6. 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.
Options- A. 5
- B. 500
- C. 1000
- D. 2000 Discuss
- 7. Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million).
Options- A. 50
- B. 1000
- C. 2000
- D. 5000 Discuss
- 8. Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes
Options- A. blood poisoning.
- B. anaemia.
- C. nervous system disorder.
- D. all (a), (b) and (c). Discuss
- 9. Operating principle of cyclone separator is based on the action of __________ dust particles.
Options- A. diffusion of
- B. centrifugal force on
- C. gravitational force on
- D. electrostatic force on Discuss
- 10. Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
Options- A. by chemical coagulation.
- B. in sedimentation tanks equipped with mechanical scrapper.
- C. in vacuum filter.
- D. in clarifiers. Discuss
Environmental Engineering problems
Search Results
Correct Answer: gravity separator having oil skimming devices.
Correct Answer: 30 to 70 kV DC
Correct Answer: both (a) & (b)
Correct Answer: 0.1
Correct Answer: suspended inorganic matter
Correct Answer: 5
Correct Answer: 5000
Correct Answer: all (a), (b) and (c).
Correct Answer: centrifugal force on
Correct Answer: in sedimentation tanks equipped with mechanical scrapper.
Comments
There are no comments.More in Chemical Engineering:
Programming
Copyright ©CuriousTab. All rights reserved.