Which of the following is the most important deterrents to an extended use of pulverised coal in boiler firing ?

Related Mcqs:

Forced recirculation of furnace gases is practised_______________?

A. To increase heat transfer by convection B. To ensure uniform temperature C. In furnaces, operating below 750°C D. All A., B. and C....

Which is not a hearth furnace ?

A. Glass tank furnace B. Open hearth furnace C. Cupola D. Reheating furnace...

Unit of furnace loading is____________________?

A. Ton stock/hr/m2 hearth area B. Ton stock/hr C. Ton stock/m2 hearth area D. Both B. and C....

Circulation of gases in furnace is caused by the_________________?

A. Change in volume during a change of temperature B. Difference in density between hot and cold gases C. Furnace pressure in conjunction with draft in flues D. All A., B. and C....

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of_________________?

A. Graphite powder B. Thoria C. Zircon powder D. Beryllium...