Q. Which of the following is the most widely used disinfectant in water treatment ?

View solution

Q. Pick out the wrong statement

View solution

Q. Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by

View solution

Q. 5-200 μm size particles are called

View solution

Q. The progressive warming up of the earth's surface is mainly due to the

View solution

Q. Higher concentration of nitrogen dioxide in atmospheric air causes

View solution

Q. Ozone is

View solution

Q. The permissible color for domestic water supply is __________ ppm.

View solution

Q. High noise levels produced during operation of fans and compressors can be reduced by using

View solution

Q. The Killer gas which caused Bhopal gas tragedy in 1984 was

View solution

Q. In the context of the chemical process industries, the term BOD is normally associated with the

View solution

Q. Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels.

View solution

Q. Inhalation of silica dust causes a disease called

View solution

Q. Solid content in most of the domestic sewage is about __________ percent.

View solution

Q. 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.)

View solution

Q. Pick out the wrong statement.

View solution

Q. Which of the following is not an air pollutant ?

View solution

Q. Presence of high concentration of ozone and smog in atmospheric air causes the

View solution

Q. Algae growth in water is controlled by

View solution

Q. __________ is removed from water by lime-soda process.

View solution