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Lumber Defects Quiz
Quiz Practice Questions
Sawmilling quiz
Q: True dimensions of a 2x4 (Hint, it is less then 2x4)
A: 1.5” x 3.5”
Q: Why is a 2x4 not a 2x4 after it dries?
A: Wood shrinks and gets lighter when it looses moisture.
Q: How does the company make the 2x4 its new dimension? What is the process called?
A: They put the wood through a 4 sided planer, called 24S.
Q: Why do we still call them 2x4’s?
A: Because they started out as 2”x4” measurement.
Q: What is the moisture content of a tree after it has been cut down?
A: 40%
Q: What moisture content is required for wood to be used for building?
A: 9-12%
Q: What are two different ways to dry wood? What is the fastest?
A: Kiln drying and air drying. Kiln is faster (Faster is not better especially when it comes to drying wood)
Q: What is softwood and hardwood?
A: Softwood refers to the seed coat (all trees with cones for seed distribution are softwood) not the hardness of the wood. Most woods in the category of softwoods are softer than those considered hardwoods.
Q: What is the name of the wood placed between pieces of cut wood to allow air movement? How thick are they usually?
A: Stickers, 3/4" thick
Q: What are important considerations when it comes to storing wood to dry?
A: The wood must be stored level, strapped down or weighted, and covered so it is not in direct sunlight or in contact with rain but still have good air flow so it does not mold or rot.
Q: What are the two main types of sawmills?
A: Bandsaw and Head saw (large circular saw)
Q: What kind of sawmill does the school district have?
A: Bandsaw mill, more specifically a hydraulic Woodmizer LT40
A: 1.5” x 3.5”
Q: Why is a 2x4 not a 2x4 after it dries?
A: Wood shrinks and gets lighter when it looses moisture.
Q: How does the company make the 2x4 its new dimension? What is the process called?
A: They put the wood through a 4 sided planer, called 24S.
Q: Why do we still call them 2x4’s?
A: Because they started out as 2”x4” measurement.
Q: What is the moisture content of a tree after it has been cut down?
A: 40%
Q: What moisture content is required for wood to be used for building?
A: 9-12%
Q: What are two different ways to dry wood? What is the fastest?
A: Kiln drying and air drying. Kiln is faster (Faster is not better especially when it comes to drying wood)
Q: What is softwood and hardwood?
A: Softwood refers to the seed coat (all trees with cones for seed distribution are softwood) not the hardness of the wood. Most woods in the category of softwoods are softer than those considered hardwoods.
Q: What is the name of the wood placed between pieces of cut wood to allow air movement? How thick are they usually?
A: Stickers, 3/4" thick
Q: What are important considerations when it comes to storing wood to dry?
A: The wood must be stored level, strapped down or weighted, and covered so it is not in direct sunlight or in contact with rain but still have good air flow so it does not mold or rot.
Q: What are the two main types of sawmills?
A: Bandsaw and Head saw (large circular saw)
Q: What kind of sawmill does the school district have?
A: Bandsaw mill, more specifically a hydraulic Woodmizer LT40
Framing Quiz #1
Q: (2) What are the two sizes of lumber used for walls?
A: 2”x4” and 2”x6
Q: What is R value?
A: Insulative value
Q: What size lumber is used interior walls? What is its R value?
A: 2”x4”, R12
Q: What sized lumber is used for exterior walls? What is its R value?
A: 2”x6”, R20
Q: What are the floor supports referred to as? What size are they potentially?
A: Joists, 2”x10” or 2”x12”
Q: What is and example of sheet goods?
A: Plywood, drywall, flooring, roofing
Q: What is the standard size for sheet goods?
A: 4'x8'
Q: What is the smallest door width you will find in a house and what is it used for?
A: 24”, bathroom.
Q: What are standard width exterior door sizes?
A: 34" and 36"
Q: What is a standard interior door width?
A: 30"
Q: What is a standard interior hallway width?
A: Standard is a minimum 36", but up to 48" looks much better.
Q: What is a standard height door?
A: 6'8"
Q: How much extra room do you leave for door frames and windows when framing a rough opening for a door or window?
A: 1"
A: 2”x4” and 2”x6
Q: What is R value?
A: Insulative value
Q: What size lumber is used interior walls? What is its R value?
A: 2”x4”, R12
Q: What sized lumber is used for exterior walls? What is its R value?
A: 2”x6”, R20
Q: What are the floor supports referred to as? What size are they potentially?
A: Joists, 2”x10” or 2”x12”
Q: What is and example of sheet goods?
A: Plywood, drywall, flooring, roofing
Q: What is the standard size for sheet goods?
A: 4'x8'
Q: What is the smallest door width you will find in a house and what is it used for?
A: 24”, bathroom.
Q: What are standard width exterior door sizes?
A: 34" and 36"
Q: What is a standard interior door width?
A: 30"
Q: What is a standard interior hallway width?
A: Standard is a minimum 36", but up to 48" looks much better.
Q: What is a standard height door?
A: 6'8"
Q: How much extra room do you leave for door frames and windows when framing a rough opening for a door or window?
A: 1"
Framing Quiz #2
Q: What is the name for wood that has been chemically treated for underground and under water use?
A: Pressure treated (Know pressure treated) also known as ACQ (Alkaline Copper Quaternay) but you are not expected to know this.
Q: How long is chemically treated wood supposed to last?
A: 25 years
Q: What chemicals used to be used in this process of question #8?
A: Arsenic was used up until 2004 in pressure treated lumber
Q: Where do we use sheet goods in builds?
A: Flooring, walls, ceilings, roofs
Q: What is the stud spacing is used today for interior and exterior walls?
A: 16" on center.
Q: What used to be the spacing for interior and exterior walls?
A: 24" on center.
Q: Why do you need jack studs?
A: To support both sides of the header for a door or window.
Q: What happens when you leave lumber not strapped down, or in a dry or wet environment?
A: The wood becomes defective (see the defective wood info above).
Q: Can you return wood to the lumber store that is not straight?
A: Yes but usually only if it was delivered recently, it must still have its tag on it, and it for sure can not have been cut.
Q: What size lumber are exterior walls framed with today?
A: 2"x6"
Q: What is the standard residential ceiling height?
A: 8'
Q: What other ceiling heights are becoming very popular?
A: 9' and 10' even 12' sometimes, these taller walls look great but it does create problems for heating and cooling systems in houses.
Q: What is the standard door height?
A: 6'8"
Q: What other door heights are becoming very popular?
A: 8", this looks awesome, but these doors are very expensive, they can be $1000+ for one interior door.
Q: What is a standard interior residential door width?
A: 30"
Q: What is the smallest residential interior door width? Where is it used? 24”, bathroom.
Q: What is the interior door width for wheelchair accessibility?
A: 36"
Q: Know the labelled parts of a framed wall. Top plate, bottom plate, king stud, jack stud or trimmer, header, rough sill and double top plate.
A: See picture below
A: Pressure treated (Know pressure treated) also known as ACQ (Alkaline Copper Quaternay) but you are not expected to know this.
Q: How long is chemically treated wood supposed to last?
A: 25 years
Q: What chemicals used to be used in this process of question #8?
A: Arsenic was used up until 2004 in pressure treated lumber
Q: Where do we use sheet goods in builds?
A: Flooring, walls, ceilings, roofs
Q: What is the stud spacing is used today for interior and exterior walls?
A: 16" on center.
Q: What used to be the spacing for interior and exterior walls?
A: 24" on center.
Q: Why do you need jack studs?
A: To support both sides of the header for a door or window.
Q: What happens when you leave lumber not strapped down, or in a dry or wet environment?
A: The wood becomes defective (see the defective wood info above).
Q: Can you return wood to the lumber store that is not straight?
A: Yes but usually only if it was delivered recently, it must still have its tag on it, and it for sure can not have been cut.
Q: What size lumber are exterior walls framed with today?
A: 2"x6"
Q: What is the standard residential ceiling height?
A: 8'
Q: What other ceiling heights are becoming very popular?
A: 9' and 10' even 12' sometimes, these taller walls look great but it does create problems for heating and cooling systems in houses.
Q: What is the standard door height?
A: 6'8"
Q: What other door heights are becoming very popular?
A: 8", this looks awesome, but these doors are very expensive, they can be $1000+ for one interior door.
Q: What is a standard interior residential door width?
A: 30"
Q: What is the smallest residential interior door width? Where is it used? 24”, bathroom.
Q: What is the interior door width for wheelchair accessibility?
A: 36"
Q: Know the labelled parts of a framed wall. Top plate, bottom plate, king stud, jack stud or trimmer, header, rough sill and double top plate.
A: See picture below
Framing Quiz #3
Q: If you have a twisted board, can you still use it and if so, where?
A: Attach it to a straight board to take out the twist.
Q: After you cut all the parts to your walls, you need to lay them out, to know precisely where you need to attach your studs with nails, what is the next step before assembling your walls?
A: Measure and mark the locations of all your studs, trimmers and cripples.
Q: When marking your bottom and top plates, why do you mark both sides of each plate?
A: So you can line up on the lines and nail in the right spots.
Q: Measure your stud locations with a tape end to end on your plate, not in 16” sections, why?
A: Because the end of the tape moves and can cause inaccuracies.
Q: Why do we use a hammer instead of a power nailer?
A: Hammers are slower and give use more time to catch our potential mistakes
Q: What coating keeps a screw from rusting in pressure treated material?
A: Ceramic
Q: What is the name of the wooden stands that we use to cut lumber on, on the jobsite?
A: Saw horses
Q: Why do we say measure twice, cut once?
A: To be sure we don’t waste material because it is not generally possible to lengthen a board after it has been cut.
Q: What kid of mark do we make on the wood using our pencil?
A: A line then a V like an arrow is best as it is easy to see.
A: Attach it to a straight board to take out the twist.
Q: After you cut all the parts to your walls, you need to lay them out, to know precisely where you need to attach your studs with nails, what is the next step before assembling your walls?
A: Measure and mark the locations of all your studs, trimmers and cripples.
Q: When marking your bottom and top plates, why do you mark both sides of each plate?
A: So you can line up on the lines and nail in the right spots.
Q: Measure your stud locations with a tape end to end on your plate, not in 16” sections, why?
A: Because the end of the tape moves and can cause inaccuracies.
Q: Why do we use a hammer instead of a power nailer?
A: Hammers are slower and give use more time to catch our potential mistakes
Q: What coating keeps a screw from rusting in pressure treated material?
A: Ceramic
Q: What is the name of the wooden stands that we use to cut lumber on, on the jobsite?
A: Saw horses
Q: Why do we say measure twice, cut once?
A: To be sure we don’t waste material because it is not generally possible to lengthen a board after it has been cut.
Q: What kid of mark do we make on the wood using our pencil?
A: A line then a V like an arrow is best as it is easy to see.