Related Questions

Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A 5CaO . 3Al2O3
B 3CaO . Al2O3
C 3CaO . SiO2
D 2CaO . SiO2
A manufacturer of TV wants to make a profit of Tk. 300,000 on sale of 200 TV sets. It costs Tk. 10,000 each to make the first 100 TV sets and Tk. 7,500 each to make TV sets after the first 100 sets. What should be the selling price of each TV sets in Taka?
A 10,250
B 10,350
C 10,500
D 10,600
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
As compared to ordinary portland cement, use of pozzuolanic cement
A Reduces workability
B Increases bleeding
C Increases shrinkage
D Increases strength
The compound of Portland cement which contributes to the strength after two to three years is
A Tri-calcium silicate
B Di-calcium silicate
C Tri-calcium aluminate
D Tetra-calcium alumino ferrite
A manufacturer of TV wants to make a profit of Tk. 3,00,000 on sale of 200 TV sets. It costs Tk. 10000 to make each of the first 100 TV sets and Tk. 7500 make each TV set after the first 100 sets. What should be the selling price of each TV set?
A 10,250
B 10,350
C 10,500
D 10,550
Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
A Quick setting cement
B Rapid hardening cement
C White cement
D Low heat Portland cement
Main constituents of portland cement are calcium aluminate and
A Gypsum
B Silicates
C Sodium silicate
D Carbonates
Ordinary Portland Cement এর Initial Setting Time কত?
A ৫ মিনিট
B ১০ মিনিট
C ৩০ মিনিট
D ৫ ঘণ্টা
The normal consistency of ordinary Portland cement is about
A 10%
B 20%
C 30%
D 40%

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