A. Spalling
B. Refractoriness
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- Highly porous refractory bricks are ____________________?
A. Less susceptible to chemical attack by molten fluxes and gases etc
B. Very strong
C. Having very high thermal conductivity
D. None of these - Refractory bricks burnt at very high temperature have got______________?
A. Greater resistance to corrosion by slags
B. Less resistance to corrosion by slags
C. High spalling tendency
D. None of these - Fusion of bauxite and ________________ produces high alumina cement?
A. Alum
B. Limestone
C. Coke
D. Quartz - Fusion of limestone and ______________ produces high alumina cement?
A. Sand
B. Bauxite
C. Quicklime
D. Calcite - Refractory bricks having high thermal conductivity is desirable, when it is to be used in the _________________?
A. L.D. converter
B. Blast furnace
C. Rotary kiln
D. Recuperator - Sulphur removal by heating of pyrite ore in presence of air is called its ____________________?
A. Reduction
B. Roasting
C. Calcination
D. Smelting - A substance produced by a living organism and capable of anti-microbial activity is called a/an < ____________________?
strong>A. Antibiotic
B. Antiseptic
C. Disinfectant
D. None of these - Superior quality laboratory apparatus is made of the _____________ glass having low thermal co-efficient of expansion & high chemical resistance?
A. Flint
B. Soda
C. Pyrex
D. Potash - Contact process of sulphuric acid manufacture ____________________?
A. Yields acid of higher concentration than chamber process
B. Yields acids of lower concentration than chamber process
C. Is obsolete
D. Eliminates absorber - Yeast is used in the manufacture of ____________________?
A. Penicillin
B. Antibiotics
C. Wine
D. Pasteurised milk
