Tar dolomite bricks are used in the_________________?

Related Mcqs:

Silicon carbide refractories have very low ___________________?

A. Refractoriness (< 1700°C) B. Thermal conductivity C. Resistance to thermal shock D. None of these...

Which is the stable form of silica upto 1470°C ?

A. Quartz B. Cristobalite C. Tridymite D. None of these...

Test piece for determination of RUL of a refractory is heated in a/an____________________?

A. Oxidising atmosphere B. Reducing atmosphere C. Electric furnace D. Neutral atmosphere...

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....

Pick out the wrong statement ?

A. Refractories used in muffle furnace should have low thermal conductivity B. The electrical resistivity of refractories drops rapidly with rise in temperature C. For reducing spalling tendency, the refractory should be well fired and its porosity should be more D. Refractoriness under load (RUL) of a refractory is always less than its refractoriness...