Carborundum used for making crucibles for melting non-ferrous metals is chemically________________?

Related Mcqs:

Which is not an acidic refractory ?

A. Silica B. Fireclay C. High alumina refractory D. Carbon black...

How many phases are present at eutectic point ?

A. 2 B. 1 C. 3 D. unpredictable...

High porosity refractory bricks have________________?

A. Poor resistance to the penetration of molten slag, metal & flue gases B. Poor heat conductivity & low strength C. Better thermal spalling resistance D. All A., B. and C....

The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?

A. Doubled B. Halved C. Trebled D. Unpredictable...

A butane isomerisation process produces 70 k.mole/hr of pure iso-butane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be_________________?

A. 3 kmole/hr B. 4 kmole/hr C. 5 kmole/hr D. 6 kmole/hr...