With decrease in porosity, the ______________ of the refractories decreases?

Related Mcqs:

Bauxite calcining rotary kilns are lined with ________________ bricks?

A. Fireclay B. Carbon C. 85% alumina D. Corundum...

Grog addition in fireclay during brick manufacture is done to_________________?

A. Reduce its shrinkage on heating B. Impart greater spalling resistance C. Enhance the strength of fired refractories D. All A., B. and C....

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...

To resist spalling tendency, a refractory should have________________?

A. Greater diffusivity B. Low specific heat C. Low thermal co-efficient of expansion D. All A., B. and C....

Zirconia refractories are not used in_____________________?

A. Making sheaths for thermocouple B. Lining high temperature ceramic kilns C. Furnaces subjected to fluctuating temperature D. High frequency induction furnaces in the form of inductors...