Related Questions

Carborundum is another name of
A Silicon carbide
B Silicon oxide
C Calcium carbide
D Calcium oxide
Carborundum consists mainly of
A Bauxite
B Silicon carbide
C Boron carbide
D Calcium carbide
Carborundum used for making crucibles for melting non-ferrous metals is chemically
A Silicon carbide
B Silicon nitride
C Crystalline magnesia
D Zirconium sulphate
Main product in calcium carbide-water reaction is
A Ca(OH)2
B C2H2
C CO2
D CaCO3
The main raw material for manufacture of silicon carbide refractories is
A Corrundum
B Carborundum
C Bauxite
D Periclase
__________ acid is the main constituent of cotton seed oil.
A Acetic
B Linoleic
C Palmitic
D Oleic
Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
A Turning
B Dressing
C Forming
D Surface finishing
The temperature in the calcium carbide furnace is __________ °C.
A 200-300
B 700-850
C 2000-2200
D 4000-4500
Commercial production of calcium carbide requires limestone and __________ as raw materials.
A Coke
B Sand
C Soda ash
D Fuel oil
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
A 1800
B 2200
C 2400
D 2700

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