Multiple Choice Questions on Cement, Lecture notes of Civil Engineering

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Part 5 : Cement

Multiple Choice Questions

1. The main ingredients of portland

cement are

a. Lime and silica b. Lime and alumina c. Silica and alumina d. Lime and iron

3. Le chatelier’s devise is used for

determining the

a. Setting time of cement b. Soundness of cement c. Tensile strength of cement d. Compressive strength of the cement

4. The main constituents of cement which

is responsible for initial setting of cement

a. Dicalcium silicate b. Tricalcium silicate c. Tricalcium aluminate d. All of the above

5. The final setting time for ordinary

portland cement as per IS specifications

should be

a. 30 minutes b. 1 hour c. 6 hours d. 10 hours

6. The normal consistency of ordinary

portland cement is about

a. 10% b. 20% c. 30% d. 40%

8. After storage, the strength of cement

a. Decreases b. Increases c. Remains the same d. May increase or decrease

9. For testing compressive strength of

cement, the size of cube used is

a. 50 mm b. 70.6 mm c. 100 mm d. 150 mm

11. Gypsum consists of

a. H2S and CO b. CaSO4 and H2O c. Lime and H2O d. CO2 and calcium

12. For testing compressive and tensile strength of cement, the cement mortar is made bymixing cement and sand in the proportion of a. 1: b. 1: c. 1: d. 1:

13. Which of the following cement contains maximum percentage of dicalcium silicate? a. Ordinary portland cement b. low heat cement c. Rapid hardening cement d. sulphate resisting cement

14. The most commonly used retarder in cement is a. Gypsum b. calcium chloride c. calcium carbonate d. none of the above