Ferromagnetic ceramic material is not used in the__________________?

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....

Zircon refractories have__________________?

A. Low co-efficient of expansion B. High RUL (1600°C) and refractoriness (> 2000°C) C. High spalling resistance D. All A., B. and C....

Which refractory must have controlled atmosphere (temperature and humidity) for its safe storage ?

A. Tar bonded dolomite bricks B. Fireclay bricks C. Mullite bricks D. Magnesite bricks...

Rate of slag attack on refractories increases with rise in temperature due to the___________________?

A. Decreased viscosity of slag B. Increased thermal conductivity of brick C. Oxidising condition in the furnace D. None of these...

______________ bricks should not be used in oxidising atmosphere?

A. Tar dolomite B. Carbon C. Silica D. Fireclay...