7. Sapwood consist of a) Innermost annual ring around the pith b) Portion of tim

Question

7. Sapwood consist of a) Innermost annual ring around the pith b) Portion of timber between heartwood and cambium layer c) Thin layers below the bark d) None of the above 8. The number of growth rings in a tree approximately represents Diameter of the tree b. a. Strength of the tree c. Moisture content of the tree d. Age of the tree 9. The thin layer between the wood and the bark is known as a. Pith b. Sapwood c. Cambium d. heartwood 10. Anisotropic materials are the materials with a. Similar properties along all the directions b. Different properties along different directions c. High modulus of rupture d. Uniform cross-section area 11. A method of classification used to determine properties of the binder is a. Penetration b. Variability c. Ductility d. Performance Grading 12. Binder which has been liquefied with heat or petroleum solvents or emulsified with water is known a. Crude petroleum b. Liquid asphalt c. Asphalt residue d. Air-blown asphalt 13. Asphalt binders become harder (more viscous) as their temperature decreases and soft (less viscous) as their temperature increases a. True b. False

Explanation / Answer

7)

option-b

sapwood is portion of timber between heartwood and cambium layer

explanation- inner most layer is pith, next is heart wood,next layer is sapwood, next cambium layer. outer most layer is bark

8)

option-d

number of growth rings represents age of tree

9)

option-c

thin layer between wood and bark is cambium layer

10)

option-b

Anisotropic materials are the materials with different properties along different directions.

11)

option-a

penetration values of the binder helps to determine wheather the binder material is soft or hard. Consistency of the material can be found.

12)

option-c

binders which has been liquified with heat or petroleum solvents or emulsified with water is called asphalt residue

13)

a-true

as the tempetarure increses viscosity decreses and asphalt becomes soft, where as if temperature falls viscosity increses and it becomes hard

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