Related Questions

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
Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm.
A [

A.

B. 10-100

B 100-200
C 100-1000
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
TLV of lead for public sewer/waste water is about __________ ppm.
A 1
B 25
C 150
D 650
TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
A 5
B 100
C 1000
D 2000
Threshold limit value (TLV) of CO in air is __________ ppm.
A 5
B 50
C 2000
D 5000
TLV of mercury in potable (drinking) water is about __________ ppm.
A 0.001
B 0.1
C 1
D 5
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
Maximum permissible turbidity in potable water is __________ ppm.
A 1
B 10
C 250
D 1000
The permissible color for domestic water supply is __________ ppm.
A 1
B 20
C 100
D 1000

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