CON 252 Building Construction Method, Material, Equipment
1. The cracks or checks shown in the accompanying sketch result from
a) Tangential Shrinkage
b) Longitudinal Shrinkage
c) Natural removal of lignin during the seasoning process
d) Air-drying the lumber in lieu of kiln-drying it
e) Extreme drought or a forest fire
Ans: a
2. Quartersawn wood is
a) What most structural lumber is cut as
b) Produced by cutting a log into parallel boards
c) More dimensionally stable than plainsawn wood
d) Also called flat-grain wood
e) Never used for flooring or siding
Ans: c
3. Which of the following is not true for plain sawed lumber?
a) It is commonly used for framing
b) It is commonly used for finish flooring, interior trim, and furniture
c) It produces maximum yield and therefore greatest economy
d) Annual rings may run at any angle to the face of the sawn lumber
e) It is susceptible to distortion during seasoning
Ans: b
4. Each of the following is a reason why large wood beams are usually glue-laminated
today rather than sawn except
a) Laminated beams are more dimensionally stable than sawn beams
b) There are fewer large, old-growth trees available
c) Laminated beams are always quarter sliced
Key – Test 2
CON 252 Building Construction Method, Material, Equipment
d) Laminated beams can be made in the exact size and shape desired
e) Pound for pound, laminated beams are stronger than sawn beams
Ans: a
5. Which wood-species statement is true?
a) Hardwoods are always harder than softwoods
b) Softwoods typically come from broad-leafed trees
c) Softwoods have a simple and uniform microstructure
d) Softwoods have vessel cell elements
e) Tamarack is a hardwood
Ans: c
6. Moisture content of wood is the
a) Amount of all water in wood
b) Ratio of the water in wood to its dry mass
c) Ratio of wood’s dry mass to its contained water
d) Density of wood
e) Amount of bound water
Ans: b
7. Wood strength is affected by
a) The species choice
b) The angle between load and grain
c) Defects like knots
d) The duration of the applied loads
e) All the above
Ans: e
8. Wood-plastic composites use which as raw material?
a) Roundwood
b) Lumber
c) Veneer
d) Wood fibers
e) Glulam
Ans: d
9. LVL, PSL, and LSL are all types of
a) Chemical treatments for wood
b) Codes that are part of the grade stamp used on plywood
c) Bolts
d) Heavy timber frame trusses
e) Structural Composite lumber products
Ans: e
CON 252 Building Construction Method, Material, Equipment
10. If a piece of lumber is stamped S-DRY, which of the following statements will be
true?
a) The moisture content of the wood will never be more than 19%
b) The wood is OSB (oriented strand board)
c) The wood is free of defects (knots and indications of insect presence)
d) The piece of lumber was surfaced when in a seasoned condition
e) It is the only type of lumber suitable to be used for framing
Ans: d
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