Vacuum steel degassing units are lined with__________________?

Related Mcqs:

Porosity is induced in insulating refractories by adding________________?

A. Powdered naphthalene B. Ammonium chloride/sulphate C. Calcium phosphate D. All A., B. and C....

Chromite refractories_____________________?

A. Are bonded with lime and clay B. (Free from silica) have better thermal fatigue resistance than silica and magnesite refractories. C. Are resistant to basic slag D. All A., B. and C....

Electrical resistor bars are made of _______________?

A. Silicon carbide B. Alumina C. Zirconia D. Graphite...

Magnesite refractories have low resistance to___________________?

A. Attack by basic slag B. Abrasion C. Disintegration on sudden change of temperature D. Both B. and C....

Highest melting (m.p = 3070°C) oxide refractory is__________________?

A. Alumina B. Thoria C. Zirconia D. Magnesia...