Threshold limit value (TLV) of CO in air is _____________ ppm?

Related Mcqs:

Workers working in _______________ industry are most prone to white lung cancer?

A. Coal mining B. Limestone mining C. Textile D. Asbestos...

Beyond what concentration of H2S in air, acute danger to human life exists ?

A. 50 ppm B. 100 ppm C. 300 ppm D. 700 ppm...

Maximum permissible turbidity in potable water is _____________ ppm?

A. 1 B. 10 C. 250 D. 1000...

The earth’s atmosphere is an envelope of gases present upto a height of about ______________ kms?

A. 10 B. 200 C. 1000 D. 2000...

Foaming and priming in boiler operation can be reduced by reduction in ______________ in feed water?

A. Turbidity B. Color (Hazen) C. Total solids D. All A., B. & C....