Building Material MCQs Part 1

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1. The major ingredients of Portland cement are

Silica and Alumina

Lime and Silica

Lime and Iron

Lime and Alumina

2. Good variety of cement contains higher percentage of

Tricalcium Aluminate

Tricalcium silicate

None of the above

Dicalcium silicate

3. Le-Chatelier's method can be used to determine

Soundness of cement

Compressive strengthof cement

Fineness of cement

Fineness of aggregate

4. Which of the following compounds affects the ultimate strength of cement?

Tricalcium silicate

Dicalcium silicate

Tricalcium Aluminoferrite

Tricalcium Aluminate

5. Which of the following Bouge's compound of cement liberates maximum heat of hydration?

C₃A

C₂S

C₄AF

C₃S

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6. In which of the following tests cement air permeability method is used?

Slump test

Fineness test

Durability test

Strength test

7. The standard consistency test is done in a

Blaine's apparatus

Vane apparatus

Le-chatelier's apparatus

Vicat's apparatus

8. The compound first to settle in cement is

Tricalcium silicate

Dicalcium silicate

Tera calcium alumina-ferrite

Tricalcium aluminate

9. The soundness of cement is tested by

Vicat's apparatus

Compression testing machine

Le Chatelier's apparatus

Standard briquette test

10. During the manufacturing of Portland cement, gypsum/plaster of paris is added to

adjust setting time of cement

increase the strength of cement

modify the color of cement

reduce heat of hydration of cement

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11. In ordinary Portland cement, the first one to react with water is

C₃A

C₄AF

C₂S

C₃S

12. Di-calcium silicate (C2S)

Has less resisitance to sulphate attack

Hardens rapidly

Generates less heat of hydration

Hydrates rapidly

13. The increased rate of strength gain of rapid hardening cement is achieved by

Higher content of C₂S

Higher content of C₃A

Higher content of C₃S

Higher content of of C₄AF

14. Fineness test of cement gives us an estimate of

Rate of hydration

Durability of concrete

Heat of hydration

Workability of concrete

15. Rapid setting cement contains relatively higher proportion of

C₂S

C₃A

C₃S

C₄AF

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16. Compound of cement which reacts immediately with water and sets first

Dicalcium silicate

Tricalcium silicate

All of the above

Tricalcium aluminate

17. Which of the following shows the correct decreasing order of rate of hydration of Portland cement compounds?

C3A> C3S> C2S> C4AF

C4AF>C3A > C3S> C2S

C3A> C4AF> C3S> C2S

C3A> C4AF> C2S> C3S

18. The cementing property of cement is mainly due to

Alumina

Gypsum

Lime

Silica

19. Hydration of cement is due to chemical action of water with

All of the above

Tricalcium Aluminate and Tricalcium Aluminoferrite

Dicalcium silicate and Tricalcium Aluminate

Tricalcium silicate and Dicalcium silicate

20. The soundness test of cement by Le-chatelier's apparatus give unsoundness due to

Both free lime and magnesia

Magnesia only

Free lime only

None of these

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21. The amount of water used in performing setting time test of cement is (assuming P= standard consistency of cement)

0.65 P

0.80 P

0.60 P

0.85 P

22. High percentage of C3S and low percentage of C2S cement will result in

Rapid hardening
High early strength and heat generation
More resistance to chemical attack

The correct answer is :

Both (1) and (2)

Only (3)

Both (2) and (3)

Only (1)

23. For the manufacture of Portland cement, the proportions of raw materials used are

None of the above

Lime 70%, silica 20%, and other 10%

Lime 63%, silica 22%, and other 15%

Lime 40%, silica 40%, and other 20%

24. Find the wrong statement: In Le-Chatelier's apparatus we:

Estimate presence of free lime in cement

Estimate expansion potential of cement

Adopt 0.78 times the standard considering of water

Estimate presence of magnesia in cement

25. Gypsum is added to cement

to prevent cracks

to counteract C3A

To help C2S and C3S

to give uniform texture

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26. The mixture of different ingredients of cement is burnt at

1200 °C

1600 °C

1400 °C

1000 °C

27. The constituent of cement which is responsible for initial setting time of cement is

Tricalcium silicate

Dicalcium silicate

Tricalcium aluminate

All of the above

28. Most important constituents of cement are

C3A and C4AF

C3S and C3A

C3S and C2S

C3A and C2S

29. As a cheap alternative, the fineness of cement is tested by using

IS 100 μ sieve where at least 90% ( by weight) should pass

IS 90 μ sieve where at least 95% ( by weight) should pass

IS 90 μ sieve where at least 90% (by weight) should pass

IS 100 μ sieve where at least 90% (by weight) should be retained

30. The purpose of the soundness test of cement is

to determine the setting time

to determine the presence of free lime

to determine the sound proof quality of cement

to determine the fineness

Building Material MCQs Part 1

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