Chemical Environmental Engineering — Test 4
Page 1 of 3
Question 1
Which of the following is the most severe air pollutant ?
Question 2
In troposphere (the weather domain), the temperature ‘t’ at height ‘h’ above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C ?
Question 3
The ratio of oxygen available to the oxygen required for stabilisation of sewage is called the __________________?
Question 4
Persons working in cement plants and limestone quarries are more prone to disease like__________________?
Question 5
Presence of soluble organics in polluted water causes_________________?
Question 6
Presence of iron and manganese in water causes___________________?
Question 7
TLV of mercury in potable (drinking) water is about ______________ ppm?
Question 8
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________?
Question 9
Presence of a certain minimum quantity of fluorine is desirable in potable water to prevent___________________?
Question 10
Pick out the wrong statement. A. Caustic embrittlement of boiler’s metallic parts is caused by high concentration of caustic soda in boiler feed water___________________?