Construction Materials Online Test - Paper 2

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Vikash chaudhary

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Total Questions: 30
Time Allotted: 30 minutes
Passing Score: 50%
Randomization: Yes
Certificate: No
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1 / 30

1. Granite is not suitable for ordinary building purposes because

a) it can not be polished

b) it is not a fireproof material

c) it is costly

d) it has less crushing strength

2 / 30

2. The calcination of pure lime results in

a) quick lime

b) hydrated lime

c) slaked lime

d) fat lime

3 / 30

3. The volume of one bag of cement weighing 50 kg is

a) 0.05m^3

b) 0.0347m^3

c) 0.025m^3

d) 0.04m^3

4 / 30

4. The constituents of cement, which act as a binder are

a) dicalcium silicate and tricalcium silicate

b) tricalcium aluminate, tricalcium silicate, and carbon

c) silica and carbon

d) none of the above

5 / 30

5. Identify the process responsible for the formation of metamorphic rocks

a) solidification of molten mass of silicates below or at the surface of earth

b) changes in texture or mineral composition or both of igneous and sedimentary rocks due to high temperature and heavy pressure

c) deposited layers of sand and silt subjected to enormous overburden pressures over geological times

d) none of the above

6 / 30

6. A mortar prepared by mixing wood powder or sawdust to the cement or lime mortar is known as

a) wood mortar

b) cinder mortar

c) gauged mortar

d) light-weight mortar

7 / 30

7. A stone is rejected if the water absorption is more than

a) 10%

b) 20%

c) 25%

d) 30%

8 / 30

8. *Specific gravity for most of the ordinary building stone lines between

a) 1.5 to 2.0

b) 2.0 to 2.5

c) 2.4 to 3.0

d) 3.0 to 3.5

9 / 30

9. *Lacquer is

a) distemper

b) oil paint

c) spirit varnish

d) none of the above

10 / 30

10. *The internal size of the mould used in brick preparation is

a) smaller than the size of fully burnt brick

b) larger than the size of fully burnt brick

c) equal to the size of fully burnt brick

d) none of the above

11 / 30

11. To which category do the chromite bricks belong?

a) neutral refractory brick

b) acid refractory brick

c) basic refractory brick

d) all of the above

12 / 30

12. *Slate stone is a

a) igneous rock

b) sedimentary rock

c) metamorphic rock

d) granular rock

13 / 30

13. *All burnt bricks are soaked in water for at least.......before use with cement mortars.

a) 4 hours

b) 3 hours

c) 2 hours

d) 1 hour

14 / 30

14. *In the sieve analysis of the fineness test, the residue on IS sieve No. 90╬╝ after 15 minutes of sieving should not be more than

a) 5%

b) 7.50%

c) 10%

d) 15%

15 / 30

15. As per IS specification, the maximum final setting time for ordinary Portland cement

a) 30 minutes

b) 60 minutes

c) 10 hours

d) 24 hours

16 / 30

16. *Cement is said to be of good if

a) its color is gray

b) one feels cool by thrusting one's hand in the cement bag

c) it is smooth when rubbed in between fingers

d) all of the above

17 / 30

17. *In low heat cement, the constituent kept to the minimum is

a) dicalcium silicate

b) tricalcium silicate

c) tricalcium aluminate

d) tetracalcium aluminate

18 / 30

18. The soil good for making bricks is

a) clay soil (silica & alumina)

b) alluvial

c) silt

d) sand and silt

19 / 30

19. Bitumen paint renders

a) a protective surface

b) a shining surface

c) a smooth surface

d) a hard surface

20 / 30

20. *The main constituent of varnish is

a) resin

b) water

c) chalk

d) all of the above

21 / 30

21. Slag cement contains

a) lime

b) pozzolana

c) sulphate

d) silvicrete

22 / 30

22. If fine sand or ash is sprinkled on the inner surface of the mould, the bricks are known as

a) slope moulded

b) sand moulded

c) table moulded

d) machine moulded

23 / 30

23. Sand has minimum volume when:

a) absolutely dry stage

b) absolutely wet stage

c) both of above

d) none of the above

24 / 30

24. *The cement becomes useless if its absorbed moisture content exceeds?

a) 5%

b) 4%

c) 3%

d) 2%

25 / 30

25. *The best primer used for structural steel work is

a) zinc oxide

b) red lead

c) white lead

d) iron oxide

26 / 30

26. The preparation of the surface of stones to obtain plain edges or to obtain stone of the required shape and size is known as

a) blasting of stone

b) quarrying of stone

c) seasoning of stone

d) dressing of stone

27 / 30

27. In quick-setting cement the compound added is

a) aluminium sulphate

b) aluminium silicate

c) calcium sulphate

d) gypsum

28 / 30

28. *Pug mill is used for

a) clay preparation

b) clay moulding

c) brick drying

d) brick burning

29 / 30

29. Choose the correct

a) percentage of silica is increased in 1st class brick

b) percentage of alumina is increased in 1st class brick

c) percentage of alumina is increased in refractory brick

d) all of the above

30 / 30

30. The maximum percentage of water absorption of 2nd class bricks in 24 hrs should be limited to

a) 10%

b) 15%

c) 20%

d) 24%

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Construction Materials Online Test – Paper 2

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