Pick out the wrong statement ? Options: A . &nbspRefractories used in muffle furnace should have low thermal conductivity B . &nbspThe electrical resistivity of refractories drops rapidly with rise in temperature C . &nbspFor reducing spalling tendency, the refractory should be well fired and its porosity should be more D . &nbspRefractoriness under load (RUL) of a refractory is always less than its refractoriness

Pick out the wrong statement ?

Question

Pick out the wrong statement ?

Options:

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

Answer: Option A
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