Threshold limit value (TLV) means maximum permissible/acceptable concentration.
Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about __________ ppm (parts per million).
Noise level heard inside a bus in busy city traffic or inside a sub-way train co
Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.
Maximum permissible concentration (i.e. TLV) of DDT in public water supply syste
Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is __________ micro gram (μ g)/litre.
Out of the following, TLV of __________ is the minimum (about 0.02 ppm).
Out of the following, TLV of __________ is the minimum (about 0.02 ppm).
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone
CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC…
Limestone powder is injected during pulverised coal burning in boilers to ______
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases.
Acute danger to human life (i.e. death) exists, if the concentration of CO 2 in
Acute danger to human life (i.e. death) exists, if the concentration of CO 2 in atmospheric air exceeds __________ percent (by volume).
Sound produced by an automobile horn heard at a distance of 1.5 metres correspon
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.
Reingleman chart No. 2 corresponds to __________ percent black smoke.
Reingleman chart No. 2 corresponds to __________ percent black smoke.
Noise level audible to audience sitting in the 5 th row from the stage during a
Noise level audible to audience sitting in the 5 th row from the stage during a large orchestra show corresponds to about __________ decibels.
As per the world health organisation (WHO) specification, the maximum permissibl
As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m 3 .(μg-microgram)
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man
On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because