Tolerable concentration of toxic carbon monoxide in atmospheric air is about ______________ ppm?

Related Mcqs:

Pick out the wrong statement ?

A. Angle of repose of coal increases with its increasing size B. Specific gravity of coal increases with its increasing maturity C. Refractive index and reflectance of coal increases with the increasing rank of coal D. Specific heat of coal decreases with increases in the volatile matter and decrease in the C/H ratio of coal...

Coke oven gas burns with a yellowish flame, because of the presence of __________________?

A. CO2 B. CH4 C. H2 D. NH3...

Naphthalene is removed from coke oven gas by________________?

A. Scrubbing with wash oil (a petroleum product) B. Adsorbing on bog iron bed C. Absorbing in vetro-coke solution D. None of these...

Rate of low temperature oxidation of coal due to bad storage conditions_______________?

A. Decreases with increase in surface area B. Does not vary with increase in surface area C. Is more for low volatile coal compared to high volatile coal D. Is accelerated by storage in large heaps with small surface to volume ratio...

Higher efficiency in the combustion of solid fuel cannot be achieved by________________?

A. Proper fuel preparation B. Keeping the flue gas exhaust temperature very high C. Adopting efficient-fuel firing technique & equipment D. Supplying correct quantity of combustion air...