Bottom of basic open hearth furnace are constructed of__________________?

Related Mcqs:

Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns ?

A. 1800 B. 2200 C. 2400 D. 2700...

Thermal spalling mainly occurs during _____________ of furnaces?

A. Cooling down B. Warming up C. Both A. & B. D. Neither A. nor B....

What is the value of ‘q’ for saturated liquid feed to a distillation column ?

A. 0 B. <1 C. 1 D. >1...

Addition of grog in fireclay brick during its manufacture is advantageous, because it results in_____________________?

A. Less shrinkage in heating, decreased apparent porosity & increased specific gravity B. High strength & thermal spalling resistance C. Less addition of water to get a workable plasticity & lesser time required for drying the raw refractories and hence increased rate of production D. All A., B. and C....

Permeability of bricks is a measure of the_________________?

A. Refractoriness B. Melting point C. Rate at which a fluid will pass through the pores D. Expansion during heating...