Chemical Engineering — Test 201
Page 1 of 3
Question 1
Fluorosis (a bone disease) is caused by the presence of high concentration of ____________ in atmospheric air?
Question 2
Death may occur, when SO2 concentration in atmospheric air exceeds ______________ ppm?
Question 3
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about ______________ decibels?
Question 4
Most of the atmospheric air pollutants are present in large quantity in__________________?
Question 5
____________ is removed from water by lime-soda process?
Question 6
Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?
Question 7
Which of the following is the most detrimental for water used in high pressure boiler ?
Question 8
Septic tanks are used for the ______________ of the deposited solids?
Question 9
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?
Question 10
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called_________________?