Properties Of Cement Objective & Answers

MCQs On Properties Of Cement

Cement Properties MCQs

1. Which chemical compostion has highest content in OPC?

A) Alumina
B) Silica
C) Lime
D) RIron Oxide

Answer is C)
Lime forms nearly two-third (2/3) of the cement. Therefore sufficient quantity of the lime must be in the raw materials for the manufacturing of cement.

2. Excess in lime causes _______

A) The cement to shrink and integrate
B) The cement to shrink and disintegrate
C) The cement to expand and integrate
D) The cement to expand and disintegrate

Answer is D)
Sufficient quantity of lime forms di-calcium silicate (C2SiO2) and tri-calcium silicate in the manufacturing of cement.

3. Silica in excess causes ________

A) The cement to set slowly
B) The cement to set quickly
C) The cement to expand
D) The cement to disintegrate

Answer is A)
Explanation: Silica gives strength to the cement. Silica in excess causes the cement to set slowly.

4. Alumina in excess causes _________

A) Reduces the strength of the cement
B) Inceases the strength of the cement
C) No change
D) Sometimes increase or decrease the strength of the cement

Answer is A)
Explanation: Alumina supports to set quickly to the cement. It also lowers the clinkering temperature. Alumina in excess reduces the strength of the cement.

5. Which compound gives the colour to the cement?

A) Lime
B) Silica
C) Iron Oxide
D) Alumina

Answer is C)
Explanation: Iron oxide pigments are in the form of particles ranging approximately from 0.1 to 1.0 micron. The difference in color between one pigment and another is due to the shape and surface structure of the particle.

6. Which cement contains high percentage of C3S and less percentage of C2S?

A) Rapid Hardening Cement
B) Ordinary Portland Cement
C) Quick Setting Cement
D) Low Heat Cement

Answer is A)
Explanation: This cement contains high percentage of C3S and less percentage of C3S. This is infact high early strength cement.

7. When concrete is to be laid under water ___________ is to used?

A) Rapid Hardening Cement
B) Ordinary Portland Cement
C) Quick Setting Cement
D) Low Heat Cement

Answer is C)
Explanation: When concrete is to be laid under water, quick setting cement is to used. This cement is manufactured by adding small percentage of aluminum sulphate (Al2SO4) which accelerates the setting action.

8. Which of the following is correct for Low Heat Cement?

A) Suitable for use in cold weather areas
B) Heat of hydration is reduced by tri calcium aluminate content
C) This cement requires longer period of curing
D) This cement contains high aluminate %age usually between 35-55%

Answer is B)
Explanation: In this cement the heat of hydration is reduced by tri calcium aluminate content. It contains less percentage of lime than ordinary port land cement. It is used for mass concrete works such as dams etc.

9. Soundness of cement is tested by?

A) Vicat apparatus
B) Le Chatalier apparatus
C) soundness meter
D) Duff Abrams apparatus

Answer is B)
Le Chatalier apparatus is used for Soundness of cement

10. Which of the following is correct for Low Heat Cement?

A) Suitable for use in cold weather areas
B) Heat of hydration is reduced by tri calcium aluminate content
C) This cement requires longer period of curing
D) This cement contains high aluminate %age usually between 35-55%

Answer is B)
Explanation: In this cement the heat of hydration is reduced by tri calcium aluminate content. It contains less percentage of lime than ordinary port land cement. It is used for mass concrete works such as dams etc.