Faster rate of drying of moulded refractories results in high _____________ of refractories?

Related Mcqs:

Roof of a basic open hearth furnace is lined with ______________ bricks?

A. Silica B. Fireclay C. Dolomite D. Magnesite...

Pick out the wrong statement ?

A. A ceramic material which becomes fluid upon heating and can be moulded in liquid/viscous state is termed s glass B. Ceramic materials do not undergo vitrification on heating C. Ceramic materials are brittle in nature D. Non-oxide ceramic materials generally act as a semi-conductor...

Maximum apparent porosity of magnesite bricks is about _____________ percent?

A. 8 B. 24 C. 44 D. 58...

Vacuum steel degassing units are lined with__________________?

A. Silica bricks B. Low duty firebricks C. High alumina bricks D. Graphite blocks...

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...