Related Questions

Bauxite calcining rotary kilns are lined with __________ bricks.
A Fireclay
B Carbon
C 85% alumina
D Corundum
Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.
A Preheating
B Cooling
C Burning
D All of the above
Rotary kilns are used in the
A Calcination of limestone & dolomite
B Cement manufacture
C Both A and B
D Neither A nor B
Tunnel kilns are usually used for
A Roasting of pyrites
B Drying/tempering of refractories
C Reheating of slabs
D Melting of glass
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
For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
A 1 : 2
B 1 : 3
C 1 : 4
D 1 : 6
__________ bricks are used in the burning zone of a cement rotary kiln.
A High alumina
B Fireclay
C Thoria
D Silicon carbide
The ratio of sand to gravel in a mixture is 7 : 8 while that between gravel and cement is 6 : 7. What is the ratio of sand to cement in the mixture?
A 49 : 48
B 7 : 7
C 8 : 6\
D 3 : 4
Initial setting time of cement for asbestos cement products should be not less than
A 30 minutes
B 50 minutes
C 75 minutes
D 90 minutes
As compared to ordinary portland cement, high alumina cement has
A Higher initial setting time but lower final setting time
B Lower initial setting time but higher final setting time
C Higher initial and final setting times
D Lower initial and final setting times

Next steps