Which one of the following gases shows a different behaviour at high pressure?
A.Carbon dioxide
B.Water vapours
C.Hydrogen
D.Ozone
Category: Environmental Engineering Mcqs
All of the following are souhd obsorptive materials EXCEPT:
A.Rugs
B.Mirrors
C.Carpets
D.Heavy drapes
Which pollutants result from automobile exhaust?
A.Carbon monoxide
B.Nitrous oxide
C.Hydrocarbons
D.Sulphur dioxide
E.All of the above
The process used for the removal of dissolved carbondioxide from the water, is known as
A.Coagulation
B.Agitation
C.Aeration
D.Sedimentation
E.Zeolitc
Which of the following chemical is least poisonous?
A.Arsenic
B.Lead
C.Sodium
D.Cyanide
E.Mercury
The presence of which of the following material in water is not considered to be dangerous?
A.Lead
B.Copper
C.Mercury
D.Calcium
E.Zinc
Identify the incorrect statement if any Zeolite process is suitable for
A.Removing temporary hardness
B.Removing permanent hardness
C.Cent percent removal of hardness
D.Acidic waters
E.When zeolite becomes inactive, it may be reactivated by flushing with brine solution
Ionisation chamber can be used for the detection of all of the following EXCEPT
A.beta rays
B.X-rays
C.gamma rays
D.Alpha rays
Out of the following metals the least permissible percentage in drinking water is
A.Chromium
B.Copper
C.Zinc
D.Lead
Mottling of teeth is associated with the presence of
A.Chloride in water
B.Calcium in water
C.Sodium chloride in water
D.Sulphur in water
E.Fluorides in water
