Wood as a Building Material Quiz

Play an AI-generated podcast conversation about this lesson

What is the key characteristic that distinguishes poplar and bass wood from other annual rings?

They are dark in color

They have indistinct annual rings (correct)

They are heavy in weight

They yield non-resinous wood

In the building industry, what is the difference between wood and timber?

Wood is the fibrous material, while timber retains its natural structure (correct)

Wood is hard, while timber is heavy

Wood is the material under the bark, while timber is the felled tree

Wood is used for construction, while timber has chemical composition

What is the distinguishing feature that makes conifers predominantly used for construction purposes?

Their long straight trunk (correct)

Their dark color

Their resinous nature

Their heavy weight

What is the main principle behind structural grading of timber?

Grading based on known effects of defects Signup and view all the answers

What does yard grading or utility grading in timber classification primarily consider?

Usefulness of the material and price factors Signup and view all the answers

What is the primary difference between natural and man-made wood as building materials?

Man-made wood is rapidly replacing natural wood due to technological advances. Signup and view all the answers

What are the distinguishing features of conifers, as mentioned in the text?

Distinct annual rings and soft texture. Signup and view all the answers

Why are endogenous trees classified differently from exogenous trees?

They are classified based on their mode of growth; endogenous trees grow end wards while exogenous trees grow outwards. Signup and view all the answers

How do composite wood materials differ from natural wood?

Natural wood forms a major part of composite wood materials. Signup and view all the answers

What are some examples of exogenous trees used for making structural elements?

Oak and elm Signup and view all the answers

What distinguishes poplar and bass wood from other annual rings?

They are non-resinous, dark in color, and heavy in weight Signup and view all the answers

On what basis is standing timber classified?

Position Signup and view all the answers

What is the main principle behind stress grading of timber?

Grading by consideration of maximum principle stresses Signup and view all the answers

What does commercial grading primarily consider in timber classification?

Usefulness of the material and price factors Signup and view all the answers

What is the key characteristic that distinguishes softwoods from hardwoods according to Table 1?

Annual ring visibility Signup and view all the answers

Which of the following accurately describes the characteristics of conifers?

They have distinct annual rings, straight fibres, and are light in colour. Signup and view all the answers

In the context of wood as a building material, what distinguishes composite wood materials from natural wood?

Composite wood materials are chemically or thermally treated, while natural wood is used in its natural form. Signup and view all the answers

What distinguishes endogenous trees from exogenous trees?

Endogenous trees grow end wards, while exogenous trees grow outwards and are used for making structural elements. Signup and view all the answers

What is a major difference between plywood and impregnated wood as composite wood materials?

Plywood is mainly used for decorative finishes, while impregnated wood is more adaptable and treated as per requirements. Signup and view all the answers

How do exogenous trees differ from endogenous trees in terms of growth patterns?

Exogenous trees grow outwards, while endogenous trees grow end wards. Signup and view all the answers