Coal is heated in presence of air to a temperature of about _______________ °C, while determining its ash content for proximate analysis?

Related Mcqs:

A coal having high volatile matter content will ________________?

A. Give less yield of tar and gas on carbonisation B. Burn with a small non-smoky flame C. Have a very high calorific value D. None of these...

Low temperature oxidation of stored coal results in the________________?

A. Decrease in its caking power & calorific value B. Decrease in its carbon & hydrogen content C. Increase in its oxygen content D. All A., B. and A....

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...

Dust content in raw blast furnace gas is about _______________ gm/Nm3; hence it is cleaned to the dust level of about < 10 mg /Nm3 before use?

A. 15-30 B. 1-2 C. 70-100 D. 150-200...

During its calorific value determination by bomb calorimeter, coal is combusted by _________________?

A. Air B. Oxygen C. Oxygen enriched air D. None of these...