| 1 |
The mean residence time of methane in atmosphere in |
- A. 1-2 years
- B. 3-4 years
- C. 3-5 years
- D. 3-7 years
|
| 2 |
Fungicides are the pesticides which |
- A. Control the growth of fungus
- B. Kill insects
- C. Kill plants
- D. Kill herbs
|
| 3 |
In which layer of atmosphere, ozone is present. |
- A. Thermosphere
- B. Mesosphere
- C. Stratosphere
- D. Troposphere
|
| 4 |
The residence time of NO is |
- A. Few hours
- B. 1 day
- C. 3 days
- D. 4 days
|
| 5 |
Ecosystem is smaller units of. |
- A. Lithosphere
- B. Hydrosphere
- C. Atmosphere
- D. Biosphere
|
| 6 |
The colloidal particles in raw water can be removed by |
- A. Coagulation
- B. Aeration
- C. Chlorination
- D. Hydration
|
| 7 |
Thickness of the atmosphere is |
- A. 100 km
- B. 500 km
- C. 1000 km
- D. 1500 km
|
| 8 |
Water will be considered polluted if it has dissolved oxygen. |
- A. 3ppm
- B. 4ppm
- C. 5ppm
- D. 6 ppm
|
| 9 |
Peroxyacetyl nitrate (PAN) is a irritant to human beings and it affects |
- A. Eyes
- B. Ears
- C. Stomach
- D. Nose
|
| 10 |
The temperature in the incineration of industrial and hazardous waste process has a range. |
- A. 900 to 1000 <sup>o</sup>C
- B. 250 to 500<sup>o</sup>C
- C. 950 to 1300<sup>o</sup>C
- D. 500 to 900<sup>o</sup>C
|