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?

Related Mcqs:

Which of the following is not a practical method of low level radioactive waste disposal ?

A. Dilution with inert material B. Discharging to atmosphere through tall stacks after dilution C. Disposing off in rivers & oceans D. Filling in steel crates and shooting it off out of earth’s gravity...

Corrosion in boilers can be prevented by _________________?

A. Deaeration of feed water B. Enhancing pH of feed water by adding alkali C. Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion D. All A., B. and C....

A shallow pond in which the sewage is retained and biologically treated is called__________________?

A. Oxidation B. Imhoff tank C. Lagoon D. Skimming tank...

Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is _____________ decibels?

A. 35 B. 75 C. 95 D. 105...

Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?

A. Mercury B. Lead C. Fluoride D. Arsenic...