Woodworking Fasteners And Hardware 1 — Questions and Answers
Question 1: What is the primary purpose of drilling a pilot hole before driving a screw into hardwood?
- To make the screw go in faster
- To prevent the wood from splitting (Correct answer)
- To increase the holding strength of the screw
- To allow the screw to be removed easily
Correct answer: To prevent the wood from splitting
Pilot holes reduce stress on wood fibers as the screw enters, preventing cracking or splitting that commonly occurs in dense hardwoods.
Question 2: Which nail type has the smallest head, making it ideal for finish carpentry where the fastener must be concealed?
- Common nail
- Box nail
- Brad nail (Correct answer)
- Roofing nail
Correct answer: Brad nail
Brad nails have a very small, nearly headless profile that can be set below the surface and covered with wood filler, keeping the finished surface clean.
Question 3: What does a higher gauge number indicate when selecting nails?
- A longer nail
- A thicker nail shank
- A thinner nail shank (Correct answer)
- A harder nail material
Correct answer: A thinner nail shank
In nail gauging, higher numbers indicate thinner shanks — a 23-gauge pin nail is much thinner than a 15-gauge finish nail.
Question 4: Which screw drive type provides the best resistance to cam-out (bit slipping) when driving screws?
- Phillips (cross)
- Slotted (flat)
- Torx (star) (Correct answer)
- Pozidriv
Correct answer: Torx (star)
Torx screws feature a six-pointed star recess that maximizes contact between bit and screw, virtually eliminating cam-out during driving.
Question 5: What feature of a carriage bolt prevents it from spinning when the nut is tightened?
- The domed rounded head sits flat against the wood
- The square shoulder under the head embeds into the wood (Correct answer)
- A slot in the head accepts a screwdriver
- The threads are self-locking
Correct answer: The square shoulder under the head embeds into the wood
Carriage bolts have a square shoulder just below the rounded head that embeds into the wood surface when tapped, locking the bolt against rotation while the nut is tightened.
Question 6: What type of fastener is specifically designed to join thick timbers and structural wood members where high load capacity is required?
- Brad nail
- Lag screw (lag bolt) (Correct answer)
- Finish nail
- Pocket screw
Correct answer: Lag screw (lag bolt)
Lag screws are heavy-duty hex-head fasteners with coarse threads engineered for high-load structural connections in thick lumber and timber framing.
Question 7: When two boards are edge-glued together, what does a biscuit primarily contribute to the joint?
- Maximum structural strength
- Alignment of the board faces and additional glue surface (Correct answer)
- Waterproof sealing between boards
- A decorative detail at the joint line
Correct answer: Alignment of the board faces and additional glue surface
Biscuits primarily keep board faces flush and aligned during glue-up while adding some glue surface area, but the glued long-grain joint provides the primary structural strength.
Woodworking Fasteners And Hardware 1
What is the primary purpose of drilling a pilot hole before driving a screw into hardwood?