All of the following give Beta and Gamma radiations EXCEPT:
A.Iridium 192
B.Iodine 131
C.Cobalt 60
D.Polonium 210
Category: Environmental Engineering Mcqs
When the trees are planted by road side, the average distance between two trees should be
A.2 to 3 metres
B.5 to 8 metres
C.10 to 15 metres
D.25 to 30 metres
Which of the following constituent has highest proportion in atmospheric air?
A.Nitrous oxide
B.Carbon monoxide
C.Helium
D.Neon
One kg of octane is burnt by four alternative processes given below. In which case the work available will be maximum
A.When burnt in an open pan in atmosphere
B.When burnt in an internal combustion engine
C.When burnt in a fuel cell
D.When burnt in a reversible process
Which of the following is pesticide?
A.Endrin
B.Aldrin
C.Toxaphone
D.DDT
E.All of the above
Which radio nuclide has the least half life period?
A.Carbon 14
B.Iodine 131
C.Radium
D.Hydrogen 3
Which of the following shading device will transmit least leat inside a room?
A.Plain glass sheet 3 mm thick
B.Plain glass sheet with wire mesh outside
C.Plain glass sheet with Venetion blind inside
D.Plain glass with curtain inside
Aeration of water is done for all of the following purposes EXCEPT for:
A.removal of bad tastes
B.removal of carbon dioxide
C.increasing the quantity of oxygen in water
D.removal of temporary hardness
Turbidity in water is due to
A.Algae
B.Fungi
C.Organic salts
D.Finely divided particles of clay, silt and organic matter
E.None of the above
The maximum permissible turbidity for drinking water
A.Zero
B.1 – 4 ppm
C.15 – 25 ppm
D.3 – 50 ppm
E.30 – 50 ppm
