- Mandatory once in 2 years
- Mandatory once in 3 years
- Mandatory Once in a 1 Year
- Mandatory once in a 6 month
- 120 dB (A)
- 130 dB (A)
- 140 dB (A)
- 115 dB (A)
- 90 dB (A)
- 85 dB (A)
Q) Portability test of drinking water supply to the mine employees to be made______irrespective of its source, preferably after rainy season, the sample of water should be collected from the points of consumption.
Solution:
Portability test of drinking water supply to the mine employees to be made Mandatory Once in a 1 Year irrespective of its source, preferably after rainy season, the sample of water should be collected from the points of consumption.
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