Metallic recuperators are not used for waste heat recovery, if the hot flue gas temperature is above _____________ °C, because corrosion prevails at higher temperatures?

Related Mcqs:

Which of the following is not a directly fired furnace ?

A. By-product coke oven B. Calcination kiln C. Sintering furnace D. Open hearth furnace...

Soaking pits are meant for heating steel_________________?

A. Ingots B. Coils C. Sheets D. Slabs...

Example of an indirectly heated furnace is__________________?

A. Hood annealing furnace B. Muffle furnace C. Both A. and B. D. Neither A. nor B....

An example of recuperative furnace is the__________________?

A. Soaking pit B. Open hearth furnace C. Coke ovens D. None of these...

Fuel economy in an industrial furnace operation cannot be achieved by the use of__________________?

A. Stoichiometric combustion air B. Non-preheated combustion air C. Combustion air not enriched with oxygen D. Recuperators...