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Building Materials
0

Building Material MCQs Part 1

December 9, 2019

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Page 1 of 6

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

Tricalcium silicate and Dicalcium silicate

Tricalcium Aluminate and Tricalcium Aluminoferrite

Dicalcium silicate and Tricalcium Aluminate

All of the above

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2. The soundness of cement is tested by

Vicat's apparatus

Compression testing machine

Le Chatelier's apparatus

Standard briquette test

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

Strength test

Slump test

Fineness test

Durability test

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4. The standard consistency test is done in a

Vane apparatus

Vicat's apparatus

Le-chatelier's apparatus

Blaine's apparatus

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5. 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> C2S> C3S

C3A> C4AF> C3S> C2S

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6. Fineness test of cement gives us an estimate of

Heat of hydration

Durability of concrete

Workability of concrete

Rate of hydration

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

All of the above

Tricalcium silicate

Tricalcium aluminate

Dicalcium silicate

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

0.85 P

0.65 P

0.80 P

0.60 P

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9. Rapid setting cement contains relatively higher proportion of

C₂S

C₃A

C₄AF

C₃S

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

Fineness of aggregate

Fineness of cement

Soundness of cement

Compressive strengthof cement

Page 3 of 6

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

C₃A

C₃S

C₂S

C₄AF

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12. The compound first to settle in cement is

Tricalcium aluminate

Tricalcium silicate

Tera calcium alumina-ferrite

Dicalcium silicate

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

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

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

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

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

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

Tricalcium Aluminoferrite

Tricalcium silicate

Tricalcium Aluminate

Dicalcium silicate

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

Magnesia only

Free lime only

Both free lime and magnesia

None of these

Page 4 of 6

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16. 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

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17. Gypsum is added to cement

To help C2S and C3S

to give uniform texture

to counteract C3A

to prevent cracks

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18. Di-calcium silicate (C2S)

Has less resisitance to sulphate attack

Generates less heat of hydration

Hydrates rapidly

Hardens rapidly

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19. Most important constituents of cement are

C3A and C2S

C3A and C4AF

C3S and C3A

C3S and C2S

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

C₃A

C₂S

C₃S

C₄AF

Page 5 of 6

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21. The purpose of the soundness test of cement is

to determine the setting time

to determine the sound proof quality of cement

to determine the fineness

to determine the presence of free lime

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

reduce heat of hydration of cement

increase the strength of cement

modify the color of cement

adjust setting time of cement

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23. The major ingredients of Portland cement are

Lime and Alumina

Lime and Iron

Lime and Silica

Silica and Alumina

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24. 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 :

Only (3)

Both (2) and (3)

Only (1)

Both (1) and (2)

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

Dicalcium silicate

Tricalcium silicate

All of the above

Tricalcium aluminate

Page 6 of 6

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26. The cementing property of cement is mainly due to

Lime

Alumina

Silica

Gypsum

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

Higher content of of C₄AF

Higher content of C₃A

Higher content of C₂S

Higher content of C₃S

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28. Good variety of cement contains higher percentage of

Tricalcium silicate

None of the above

Tricalcium Aluminate

Dicalcium silicate

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

1400 °C

1000 °C

1200 °C

1600 °C

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

None of the above

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

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

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

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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