Knowledge Assessment – 24360 (v3) Demonstrate knowledge of timber and other construction materials used in BCATS projects

Student name:

Describe these types of timber.

Timber type	Description
Indigenous
Exotic
Imported
Hardwood
Softwood

What type of timber comes from these trees?

Tree	Type of timber
Radiata pine
Rimu
Kauri
Totara
Tawa
Douglas fir
Kwila

Identify the parts of the log.

A B

C

E

D

A
B
C
D
E

Compare flat or tangential cut timber with quarter sawn or radial cut. Complete the following sentences.

…………………………. cut timber has a better wearing surface.

………………………… cut timber is strong and suitable for beams.

The medullary rays on ………………………… cut timber produces an attractive effect on some timbers.

Timber cupping away from the heart is more likely with ………………………… cut timber.

A large knot is running through the face of a board. List at least two effects this have on the working and structural qualities of the timber.

1. 2.

What are these defects?

What are the signs that timber is affected by:

Borer

Wet rot

Give 4 environmental causes of timber deterioration and describe the effect each has.

Reason	Effect

What is the difference between rough sawn and dressed timber?

What is the difference between air seasoning and kiln seasoning timber?

Complete the following table.

Type of timber treatment	How is it applied to the timber?	Why is the treated timber used?
Boron salts
Copper-chrome-arsenate (CCA)
Light organic solvent-borne preservative (LOSP)

List 3 safe working and handling procedures needed when working with treated timber.

1.
2.
3.

Why should treated timber never be burned?

Why should fillets be placed between the boards when seasoning?

What are three things that will help protect timber when you are storing it?

1.
2.
3.

Choose 3 different construction materials and complete the following tables. Examples of construction materials you can choose are below but you are also welcome to write about other ones you may have learned about.

metals	glass	composite materials
plastics	manufactured boards	concrete

Material 1 name:
What is it made of?
What are its basic structural properties?
What can it be used for?
What are 2 tips for handling/working with it safely?
Describe any special handling requirements.
How should it be stored?

Material 2 name:
What is it made of?
What are its basic structural properties?
What can it be used for?
What are 2 tips for handling/working with it safely?
Describe any special handling requirements?
How should it be stored?

Material 3 name:
What is it made of?
What are its basic structural properties?
What can it be used for?
What are 2 tips for handling/working with it safely?
Describe any special handling requirements?
How should it be stored?

Assessor comments and sign off:

Comments:
Assessor name: ………………………………………………………………………….. Assessor signature:…………………………………………………… Date:……………………..	RESULT: A = Achieved, N = Not Yet Achieved