Magnesite chrome refractories____________________?

Refractory Technology 22/07/2021

A. Have better spalling resistance than chrome magnesite refractories
B. Have very low thermal co-efficient of expansion
C. Are not at all resistant to the corrosive action of iron oxide
D. Have very low (50 kg/cm2) cold crushing strength (C.C.S.), and cannot be used in metalcase
form

Related Mcqs:

    Si percentage in silica refractories used in the walls of coke oven is about______________________?
    A. 45 B. 60 C. 80 D. 95...
    Which one expands on heating ?
    A. Silica bricks B. Fireclay bricks C. Both A. & B. D. Neither A. nor B....
    Pyrometric cone equivalent (PCE) value (Segar cone) of ‘Superduty refractories’ is more than 33 which corresponds to a temperature of _____________ °C?
    A. 1520 B. 1630 C. 1670 D. 1730...
    Silica bricks have low spalling resistance below 600°C, due to its________________?
    A. Very high thermal conductivity B. High co-efficient of expansion upto this temperature C. High thermal diffusivity D. Low refractoriness...
    Zirconia refractories are not used in_____________________?
    A. Making sheaths for thermocouple B. Lining high temperature ceramic kilns C. Furnaces subjected to fluctuating temperature D. High frequency induction furnaces in the form of inductors...

Leave a Reply

Your email address will not be published. Required fields are marked *