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%
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1 / 30

1. The ordinary cement used in general construction is:

a) rapid hardening cement

b) Portland cement

c) high alumina cement

d) pozzolanic cement

2 / 30

2. The seven-day compressive strength of good Portland cement, as obtained from the compressive test on cement-sand mortar cubes, should not be less than

a) 125 kg/cm^2

b) 150 kg/cm^2

c) 175 kg/cm^2

d) 200 kg/cm^2

3 / 30

3. Lime having high calcium oxide content, which can set and become hard only in the presence of CO2 from the atmosphere, is known as

a) hydraulic lime

b) fat lime

c) quick lime

d) lump lime

4 / 30

4. Which one is correct?

a) PPC gains strength slowly as compared to OPC

b) ultimate strength of PPC is higher than OPC

c) PPC has higher resistance of chemical attack

d) all of the above

5 / 30

5. *Seasoning of timber

a) makes the timber light, strong, and stable

b) prevents warping, cracking, and shrinkage in timber

c) makes timber resistant to decay by fungi, termites, etc., and also resistant to electricity

d) all of the above

6 / 30

6. *When water is added to cement, the cement hydrates, and chemical reactions take place while cement is setting, an increase in temperature occurs, and a considerable quantity of heat is generated. This phenomenon is called

a) heating of cement

b) hydration of cement

c) watering of cement

d) none of the above

7 / 30

7. *Galvanizing means

a) depositing a fine film of zinc on iron or steel by dipping in molten zinc

b) depositing a fine film of tin on iron or steel by dipping in molten tin

c) depositing a fine film of lead on iron or steel by dipping in molten iron

d) none of the above

8 / 30

8. *Fire bricks should be laid in a

a) lime mortar

b) fire cement mortar

c) fire clay mortar

d) all of the above

9 / 30

9. *Elastomers can extend up to

a) ten times their original dimensions

b) seven times their original dimensions

c) five times their original dimensions

d) three times their original dimensions

10 / 30

10. The amount of pozzolana in Portland pozzolana cement is

a) 20 to 30%

b) 30 to 40%

c) 40 to 50%

d) 50 to 60%

11 / 30

11. *According to IS399-1963, the weight of the timber is specified at

a) 8% moisture

b) 10% moisture

c) 12% moisture

d) 14% moisture

12 / 30

12. Excessive free lime and excessive magnesia present in the cement make the cement

a) unsound

b) have very low initial setting time

c) have very light compressive strength

d) gain strength faster

13 / 30

13. The artificial seasoning of timber may

a) reduce moisture

b) make light and strong

c) make fire resistance

d) remove moisture

14 / 30

14. The temperature range at which the consistency test is conducted

a) 25┬░C to 29┬░C

b) 20┬░C to 25┬░C

c) 20┬░C

d) 30┬░C to 35┬░C

15 / 30

15. The discoloration and formation of white deposits due to the presence of a relatively large proportion of soluble salts in bricks is known as

a) bloating

b) chuffs

c) efflorescence

d) nodules

16 / 30

16. *The minerals found in rocks are

a) quartz

b) feldspar

c) mica

d) all of the above

17 / 30

17. The soil good for making bricks is

a) clay soil (silica & alumina)

b) alluvial

c) silt

d) sand and silt

18 / 30

18. The strength of RHPC for one day is equal to...day of OPC

a) 2 days

b) 3 days

c) 4 days

d) 5 days

19 / 30

19. *Water absorption of cement should not be more than

a) 5%

b) 10%

c) 15%

d) 20%

20 / 30

20. *The paint which gives illumination during the night is called

a) fluorescent paint

b) cellulose paint

c) enamel paint

d) none of the above

21 / 30

21. Emulsion paints contain:

a) nitro cotton

b) zinc white

c) white lead

d) polyvinyl acetate

22 / 30

22. *If the molten magma forces itself into an already existing rock in the earth's crust and solidifies there, such a rock is known as

a) metamorphic rock

b) extrusive rock

c) intrusive rock

d) igneous rock

23 / 30

23. The trees yielding hard wood is

a) shisham

b) chir

c) deodar

d) pine

24 / 30

24. A piece of sawn timber whose cross-sectional dimensions exceed 5 cm in one direction and 20 cm in the other direction is called a

a) cant

b) deal

c) bauk

d) strip

25 / 30

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

a) 10%

b) 20%

c) 25%

d) 30%

26 / 30

26. *In a well-seasoned timber, the moisture content will be in the range of

a) 20-25%

b) 15-20%

c) 10-12%

d) 5-7%

27 / 30

27. Storage of cement should be done on

a) wet platform

b) dry platform

c) brick soling

d) the ground

28 / 30

28. *Le-Chatelier's apparatus is used to carry out

a) consistency test

b) soundness test

c) compressive strength

d) tensile strength

29 / 30

29. *In brick laying the tool used for lifting and spreading mortar and for forming joints is

a) scutch

b) trowel

c) square

d) bolster

30 / 30

30. Based on its dry weight, a freshly felled tree may contain water

a) 25%

b) 50%

c) 75%

d) 100%

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Construction Materials Online Test – Paper 2

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