QUESTION 17 What are cracks in wood due to wind damage called? Shakes O checks p

Question

QUESTION 17 What are cracks in wood due to wind damage called? Shakes O checks plastic creacks Stress fractures QUESTION 18 Which of the following are the main cell types in softwood lumber o parenchyma, tracheids, vessels, and fibres o parenchyma and cellulose o parenchyma and tracheids cullulose, extractives, lignin and hemi-cellulose QUESTION 19 What is a major difference between laminated veneer lumber and plywood o plywood is typically thicker than LVL the grain diretion of plywood veneers alternate 90 degrees, in LVL they do not LVL is older technoloby and is now generally replaced by plywood O there is no difference, these are two names for the same thing QUESTION 20 Which of the following has an FCC structure? ferrite pearlite austenite O iron carbide

Explanation / Answer

Anwers

17 A

Due to wind forces shakes are formed.

18 C

19 B

20 C

Ferrite: BCC

Pearlite: Layered (or Lamellar) structure

Austenite: FCC

Iron Carbide: Orthorhombic

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