Related Questions

Maximum permissible concentration of copper in drinking water in mg/L is
A 0.01
B 0.05
C 1.0
D 2.0
The maximum permissible limit for fluoride in drinking water is
A 0.1 mg/liter
B 1.5 mg/liter
C 5 mg/liter
D 10 mg/liter
If the total hardness of water is greater than its total alkalinity, the carbonate hardness will be equal to
A Total alkalinity
B Total hardness
C Total hardness total alkalinity
D Non carbonate hardness
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.
A 2
B 42
C 332
D 1050
Presence of __________ hardness is responsible for the temporary hardness in water.
A Carbonate
B Calcium
C Choride
D Sulphate
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
A 0.002
B 0.2
C 1.2
D 4.8
From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm.
A 1
B 5
C 50
D 500
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from __________ ppm.
A 1000 to 2000
B 3000 to 6000
C 6000 to 9000
D 10000 to 100000
Grain hardness is measured by the __________ hardness testing method.
A Knoop
B Rockwell F
C Shore sceleroscope
D Vicker's
Which of the following hardness tests does not measure the indentation hardness of metals and alloys ?
A Vicker's hardness test
B Shore sceleroscope test
C Brinell hardness test
D Rockwell hardness test

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