Civil engineer objective questions – Building Materials (Section-6)

1. The vehicle used in case of enamel paints is

a ) varnish

b ) linseed oil

c ) water

d ) all of the above

2. The main component of oil paint is

a ) carrier

b ) thinner

c ) pigment

d ) all of the above

3. The pigment in paints gives

a ) smoothness

b) durability

c ) glossy face

d) colour

4. Which has great strength against the rut ?

a ) teak

b ) shisham

c ) sal

d ) deodar

5. The wood of which tree is used to make cricket bat

a ) willow

b ) shisham

c ) sal

d ) deodar

6. The seasoning of timber is done for

a ) bark drying

b ) pith drying

c ) hot drying

d ) humidity drying

7 . The strength of timber is maximum along

a ) parallel to the grain

b ) 100 ° to 130⁰ c

c ) 45 ° to the grain

b ) perpendicular to the grain

d ) same in all direction

8. The ingredient which gives the desired colour to a paint is called

a ) base

b ) pigment

c ) vehicle

d ) solvent

9. The paints with white lead base are suitable for painting of

a ) iron work

b ) wood work

c ) both ( a ) and ( b ) of above

d ) none of the above

10. The function of base of an oil paint is

a ) to form the body of the paint

b ) to reduce the shrinkage cracks

c ) to reinforce the film of the paint after drying

d ) to prevent penetration of paint to lower surfaces

e ) all of the above

11. Seasoning of timber is done to

a ) reduce the weight of the timber

b ) reduce the chances of shrinkage

c ) increase the strength and durability

d ) all of the above

12. The defects in the growth of timber are called

a ) shakes

b ) checks

c ) both ( a ) and ( b ) of above

d ) none of the above

13. The trunk of tree left after cutting all the branches is known as

a ) plank

b ) log

c ) baulk

d ) batten

14. A piece of sawn timber whose c/ s 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

15. A piece of timber whose thickness and width are respectively 5 cm and 10 cm is called

a ) cantb ) dealc ) baukd ) strip

16. The chemical used in preserving timber are

a ) ZnCl₂ & HgCl₂

b ) coaltar

c ) creosote oil

d ) all of the above

17 . The trees yielding hard wood is

a ) shisham

b) chir

c ) deodar

d) pine

18. The trees yielding soft wood is

a ) sal & teak

b) chir and deodar

c ) shisham & sal

d) non of the above

19. According to IS : 399-1963 , specified at

a ) 8 % moisture

b ) 10 % moisture

c ) 12 % moisture

d ) 14 % moisture

20. Ply wood is made from

 a ) common timber

b ) bamboo timber

c ) teak wood only

 d ) all of the above

21. The sports goods are made from

a ) sal

b ) deodar

c ) chir

d ) mulberry

22. The timber used for decorative wood work

a ) shisham

b ) siris wood

c ) rose wood

d ) all of the a bove

23. The unit weight of sal is

a ) 600 kg / m²

b ) 700 kg / m

c ) 800 kg / m³

d ) 900 kg / m³

24. Normally the wood used for scaffolding is

a ) mango

b ) bamboo

c ) shisham

d ) sal