Worksheets05/01/2026 AE Timber Seasoning and Properties Quiz
Total questions: 10
Worksheet time: 5mins
Consider the following statements regarding seasoning of timber:
Reduction of moisture content increases dimensional stability.
Seasoned timber offers higher resistance to fungal attack.
Seasoning increases the self-weight of timber members.
Which of the above are correct?
1 only
1 and 2 only
2 and 3 only
1, 2 and 3
Which of the following statements correctly relate to heartwood and sapwood?
Heartwood is biologically inactive but mechanically stronger.
Sapwood is more permeable and hence easier to preserve.
Sapwood contributes more to structural strength than heartwood.
1 and 2 only
1 and 3 only
2 and 3 only
1, 2 and 3
Regarding annual rings in timber: Distinct annual rings indicate non-uniform growth conditions.
Wider rings generally indicate faster growth.
Mechanical strength always increases with ring width. Which are correct?
1 and 2 only
2 only
1, 2 and 3
1 only
Assertion (A): Quarter sawn timber shows better dimensional stability. Reason (R): Shrinkage in timber is maximum along the grain direction.
A and R true; R explains A
A and R true; R does not explain A
A true; R false
A false; R true
A timber showing high resistance to fire is likely to be:
A. Resinous softwood
B. Non-resinous hardwood
C. Green timber
D. Unseasoned timber
Timber members used in flooring should preferably be:
Tangentially sawn due to grain visibility
Quarter sawn to minimize cupping
Radially sawn for economy
Plain sawn for ease of polishing
Which treatment improves fire resistance but does NOT significantly improve decay resistance?
Bethell’s process
ASCU treatment
Sir Abel’s process
Creosoting
Consider the following statements: Endogenous trees are rarely used for structural timber. Exogenous trees show concentric annual rings. Hardwood necessarily implies higher density than softwood. Which are correct?
1 and 2 only
2 and 3 only
1 only
1, 2 and 3
Which of the following statements about preservatives is/are correct? A good preservative should not increase combustibility. Water-borne preservatives are odourless. Oil-borne preservatives allow easy painting.
1 and 2 only
2 only
1 and 3 only
1, 2 and 3
Assertion (A): Timber treated with ASCU is suitable for interior structural use. Reason (R): ASCU treatment is water-borne, odourless, and non-inflammable.
A and R true; R explains A
A and R true; R does not explain A
A false; R true
Both false
