Question 1

A lumber grade stamp must include information on the cross- sectional dimensions of lumber.

Accepted Answer

A) True 
 B)False  False

Question 2

The biodeterioration of wood can occur in two ways. Name them.

Accepted Answer

Deterioration due to: (i)fungal attack and (ii)termite attack.

Question 3

Lumber can be seasoned (i.e., dried)using two methods. Name them and identify the one that is commonly used and why.

Accepted Answer

1. Kiln seasoning and 2. Air seasoning. Kiln seasoning is more commonly used because it is faster.
Additionally, it kills pests and fungus residing on wood.

Question 4

How can termite infestation of lumber be prevented?

Accepted Answer

By using p

Question 5

In calculating the board foot measure, we must use the actual dimensions of lumber, not its nominal dimensions.

Accepted Answer

A) True 
 B)False

Question 6

Lumber is classified as green or dry, depending on whether the moisture content (MC)in wood is c 20% or c 19% respectively. What is the rationale behind these MC values?

Accepted Answer

Lumber with MC c 19%

Question 7

In visual grading of lumber, what do graders typically look for in the piece of lumber? Explain.

Accepted Answer

In visual grading of lumber, graders typ

Question 8

A termite shield is generally made of

Accepted Answer

A) galvanized sheet steel. 
B) kraft paper. 
C) lead sheet. 
D) asphalt- treated felt. 
A) galvanized sheet steel. 
B) kraft paper. 
C) lead sheet. 
D) asphalt- treated felt.

Question 9

Trees from which lumber is obtained are divided into two broad categories-softwood trees and hardwood trees
-based on their botanical characteristics, such as the type of leaves, evergreen or deciduous trees, and whether the trees bear flowers or not. What are the characteristics of softwood trees?

Accepted Answer

Softwood trees have conical, n

Question 10

Which of the following species of wood is not a hardwood?

Accepted Answer

A) Balsa wood 
B) Teak 
C) Redwood 
D) Oak 
E) Rosewood 
A) Balsa wood 
B) Teak 
C) Redwood 
D) Oak 
E) Rosewood

Question 11

The cellular structure of wood consists mainly of

Accepted Answer

A) hollow, small, approximately spherical cells. 
B) solid, small, approximately spherical cells. 
C) hollow, long tubular cells. 
D) hollow, small, approximately ellipsoidal cells. 
E) either C or D. 
A) hollow, small, approximately spherical cells. 
B) solid, small, approximately spherical cells. 
C) hollow, long tubular cells. 
D) hollow, small, approximately ellipsoidal cells. 
E) either C or D.

Question 12

The difference between softwoods and hardwoods is based on the

Accepted Answer

A) density of wood. 
B) abrasion resistance of wood. 
C) decay resistance of wood. 
D) botanical characteristics. 
E) strength of wood. 
A) density of wood. 
B) abrasion resistance of wood. 
C) decay resistance of wood. 
D) botanical characteristics. 
E) strength of wood.

Question 13

The moisture content in a piece of lumber has been measured to be 15%. According to the wood industry, this piece of lumber will be classified as

Accepted Answer

A) dry. 
B) arid. 
C) green. 
D) moist. 
E) wet. 
A) dry. 
B) arid. 
C) green. 
D) moist. 
E) wet.

Question 14

The terms sapwood and heartwood refer to

Accepted Answer

A) two different parts of the same tree. 
B) two different wood species. 
C) two different types of wood cells. 
D) two different subspecies of wood. 
E) two different parts of a growth ring. 
A) two different parts of the same tree. 
B) two different wood species. 
C) two different types of wood cells. 
D) two different subspecies of wood. 
E) two different parts of a growth ring.

Question 15

What are the current limitations on the use of finger- jointed lumber members in structural applications?

Accepted Answer

They can only be used in compr

Question 16

What are the actual dimensions of a 3 × 8 lumber? Of a 4 × 12 lumber?

Accepted Answer

2- 1/2 in.

Question 17

Lumber is classified as green or dry. Explain the difference between the two.

Accepted Answer

The difference between green l

Question 18

What is photosynthesis?

Accepted Answer

It is a bio- chemical process by which p

Question 19

A lumber grade stamp must include the mill identification number.

Accepted Answer

A) True 
 B)False

Question 20

If we cut a cross section through a tree trunk, we will see a number of rings. The most appropriate term for these rings is

Accepted Answer

A) annual rings. 
B) eccentric rings. 
C) concentric rings. 
D) growth rings. 
E) all of the above. 
A) annual rings. 
B) eccentric rings. 
C) concentric rings. 
D) growth rings. 
E) all of the above.

Exam 13: Materials for Wood Construction-I Lumber

A lumber grade stamp must include information on the cross- sectional dimensions of lumber.

The biodeterioration of wood can occur in two ways. Name them.

Lumber can be seasoned (i.e., dried)using two methods. Name them and identify the one that is commonly used and why.

How can termite infestation of lumber be prevented?

In calculating the board foot measure, we must use the actual dimensions of lumber, not its nominal dimensions.

Lumber is classified as green or dry, depending on whether the moisture content (MC)in wood is c 20% or c 19% respectively. What is the rationale behind these MC values?

In visual grading of lumber, what do graders typically look for in the piece of lumber? Explain.

A termite shield is generally made of

Trees from which lumber is obtained are divided into two broad categories-softwood trees and hardwood trees -based on their botanical characteristics, such as the type of leaves, evergreen or deciduous trees, and whether the trees bear flowers or not. What are the characteristics of softwood trees?

Which of the following species of wood is not a hardwood?

The cellular structure of wood consists mainly of

The difference between softwoods and hardwoods is based on the

The moisture content in a piece of lumber has been measured to be 15%. According to the wood industry, this piece of lumber will be classified as

The terms sapwood and heartwood refer to

What are the current limitations on the use of finger- jointed lumber members in structural applications?

What are the actual dimensions of a 3 × 8 lumber? Of a 4 × 12 lumber?

Lumber is classified as green or dry. Explain the difference between the two.

What is photosynthesis?

A lumber grade stamp must include the mill identification number.

If we cut a cross section through a tree trunk, we will see a number of rings. The most appropriate term for these rings is

An Overview of the Building Delivery Process How Buildings Come Into Being

Design and Constructions Regulations

Loads on Buildings

Load Resistance the Structural Properties of Materials

Properties of the Envelope-I Thermal Properties

Properties of the Envelope-II Air and Water Vapor Control

Fire and Smoke-Related Properties

Acoustical Properties of Materials

Principles of Joints and Sealants Expansion and Contraction Control

Principles of Sustainable Construction

Soils and Excavations

Below-Grade Construction Foundation Systems and Basements

Materials for Wood Construction-Ii Engineered Wood Products, Fasteners, and Connectors

Wood Light-Frame Construction-I

Wood Light-Frame Construction-II

Structural Insulated Panel Construction

Material Steel and Steel Components

Structural Steel Construction

Cold-Formed Steel Construction

Lime, Portland Cement, and Concrete

Concrete Construction-I Formwork, Reinforcement, and Slabs-On-Ground

Concrete Construction-II Site-Cast and Precast Concrete Framing Systems

Masonry Materials-I Mortar and Brick

Masonry Materials-II Concrete Masonry Units, Natural Stone, and Glass Masonry Units

Masonry and Concrete Bearing Wall Construction

Exterior Wall Cladding-I Principles of Rainwater Infiltration Control

Exterior Wall Cladding-II Masonry, Precast Concrete, and Gfrc

Exterior Wall Cladding-III Stucco, Adhered Veneer, Eifs, Natural Stone, and Insulated Metal Panels

Glass, Glazing, and Light-Transmitting Plastics

Windows and Doors

Exterior Wall Cladding-Iv Wall System in Glass

Roofing-I Low-Slope Roofs

Roofing-I Steep Roofs

Stairs

Floor Coverings

Ceilings

Filters