Question

Pick out the wrong statement.

a.

Electrical conductivity of refractory is not important, when these are to be used in electrical furnaces.

b.

Graphite and metals are the good electrical conductor among the refractories and others are all electrical insulators.

c.

Refractories used for lining electrical furnaces should ordinarily have very low electrical conductivity.

d.

Electrical conductivity of porous refractory material is low.

Posted under Basic Chemical Engineering

Answer: (a).Electrical conductivity of refractory is not important, when these are to be used in electrical furnaces.

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