Match the following defects in timber with their description:
|
List-I |
List- II |
||
|
A. |
Heart shakes |
1 |
Develop between annual rings and separate them partly |
|
B. |
Ring shakes |
2 |
spread from pith to sapwood following the directions of medullary rays |
|
C. |
Star shakes |
3 |
completely separate the annual rings |
|
D. |
Cup shakes |
4 |
outside of timber from bark to the sapwood |
Choose the correct option
• Heart shakes : These develop between the annual rings and partially separate them.
• Ring shakes : These cracks spread from pith to sapwood, generally following the direction of medullary
rays.
• Star shakes : These completely separate the annual rings.
• Cup shakes : These cracks extend from the outer/bark side towards the sapwood.
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