Building Materials MCQs Set-12

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1. The thermosetting plastic

Chars at 343°C

At 127°C to 177°C permanently set and further application of heat does not soften it

All of these

Becomes rigid when moulded at suitable pressure and temperature

2. Wrought iron contains carbon about

1.5% to 5.5%

0.1% to 0.25%

None to these

0.5% to 1.75%

3. The rocks formed by gradual deposition, are called

None of these

Igneous rocks

Metamorphic rocks

Sedimentary rocks

4. The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:

Twisted fibres

Wind cracks

Radial shakes

Heart shakes

5. Snowcrete is one of the patent forms of

Enamel paints

Cellulose paints

Water proof cement paints

Distempers

6. Geologically, marble is known as

Metamorphic rock

Igneous rock

Stratified rock

Sedimentary rock

7. Rocks formed due to alteration of original structure due to heat and excessive pressure are called

None of these

Igneous rocks

Sedimentary rocks

Metamorphic rocks

8. Name the type of cement from the following for canal linings:

Quick setting cement

Sulphate resisting cement

Pozzolana cement

Rapid hardening cement

9. Iron ore may contain

Phosphorus and manganese

All of these

Carbon

Silicon

10. Bitumen completely dissolves in

Chloroform

Carbon bisulphide

Coal tar

All of these

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11. A stone is rejected if it absorbs water more than

20 %

15 %

10 %

5 %

12. Plastic

Consists of natural or synthetic binders

All of these

Finished products are rigid and stable at normal temperature

Is an organic substance

13. French polish is

Distemper

Oil paint

None to these

Spirit varnish

14. Galvanising means covering iron with a thin coat of

Tin

Glaze

Zinc

Coal tar

15. Cast iron is used for

Structural works in beams

None of these

Columns and struts

Small sized water pipes

16. Lime stone is not a

Sedimentary rock

Stratified rock

Aqueous rock

Metamorphic rock

17. The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as

Rindgalls

None of these

Burls

Knots

18. For construction of structures under water, the type of lime used, is

Quick lime

Fat lime

Pure lime

Hydraulic lime

19. Soundness test of cement determines

Ultimate strength

Initial setting

Durability

Quality of free lime

20. During smelting process, the combination of fuel in the furnace

All the above

Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2

Forms carbon dioxide

Carbon dioxide with carbon forms carbon mono-oxide

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21. Basalt is

Intrusive igneous rock

Extrusive igneous rock

Metamorphic rock

Sedimentary rock

22. Turpentine oil is used in paints as

Vehicle

Base

Drier

Thinner

23. Ultimate strength to cement is provided by

Di-calcium silicate

Tetra calcium alumino ferrite

Tri-calcium aluminate

Tri-calcium silicate

24. Seasoning is

Coating with tar

Creosoting

Painting with sodium silicate

A process of removing sap

25. Pig iron is manufactured from the ores by

Calcination and roasting

Dressing

Smelting

All of these

26. The size of mould for bricks, is generally kept

Equal to specified size

A little large to specified size

10% larger than specified size

A little small to specified size

27. Commonly used thinner in

Cellulose paints is ethyl acetate

All of these

Lacquer paints, is alcohol

Oil paints, is naphtha

28. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a

Baulk

Strip

Cant

Deal

29. Stones used for ornamental work must be

Light

Heavy

Hard

Soft

30. Stucco paints are suitable for

(A) Stone masonry

(B) Brick walls

(C) Both (A) and (B)

(D) Neither (A) nor (B)

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31. Refractory bricks resist

All of these

Chemical action

Dampness

High temperature

32. According to ISI, bitumen is classified into

10 grades

4 grades

2 grades

8 grades

33. The rocks in which argil (or clay) predominates, are called

Siliceous rocks

Igneous rocks

Calcareous rocks

Argillaceous rocks

34. The most commonly used synthetic abrasive is

Silicon

Boric acid

Aluminium carbide

All of these

35. Jhumb bricks are

Under burnt

Over burnt

None of these

Kutcha

Building Materials MCQs Set-12

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