8191Chemical EngineeringMedium
Pick out the wrong statement?
ARefractories used in muffle furnace should have low thermal conductivity
BFor reducing spalling tendency, the refractory should be well fired and its porosity should be more
CRefractoriness under load (RUL) of a refractory is always less than its refractoriness
DThe electrical resistivity of refractories drops rapidly with rise in temperature
Correct answer
A. Refractories used in muffle furnace should have low thermal conductivity
Explanation
The correct answer is Refractories used in muffle furnace should have low thermal conductivity.