Grade 10 woodwork ā Wood working joints Quiz
1. What is a butt joint in woodworking?
A butt joint is the simplest joint where the ends or edges of two pieces are butted together and fixed with glue, nails or screws; it is common but relatively weak without reinforcement.
2. Which joint is best for making a strong right-angled frame such as a chair or table leg to rail?
Mortise and tenon joints provide a large glued and bearing area and resist shear and twisting, making them ideal for load-bearing frame connections in furniture.
3. For attaching the sides of a wooden drawer so it resists pulling apart, which joint is commonly used?
Dovetail joints interlock with tapered tails and pins, giving excellent tensile strength; they are traditionally used for drawer corners because they resist being pulled apart.
4. Where is a tongue and groove joint most commonly used?
Tongue and groove joins the long edges of boards so they lock together flat and form a smooth surface, commonly used in floorboards and panelling.
5. What defines a lap joint?
A lap joint is made by overlapping members and cutting away part of the thickness so they sit flush when fastened, often used in frames and simple structures.
6. What is the main purpose of a biscuit joint?
Biscuit joints use thin compressed wood ābiscuitsā in slots to align edges and add glue area; they help keep boards flush during glue-up.
7. Which tool is commonly used to cut a mortise by hand in a Kenyan carpentry workshop?
Traditional mortises are cut by drilling out waste and refining the square hole with chisels and a mallet for accuracy in joinery.
8. What is a rebate (rabbet) in timber work?
A rebate (rabbet) is an L-shaped cut along an edge used to seat glass, panels or another board in window frames and cabinet backs.
9. Which joint is most suitable for making picture frames with neat external corners?
A miter joint cuts the meeting edges at 45Ā° to form a neat, continuous corner profile, commonly used in picture and mirror frames.
10. Which joint uses wooden dowels inserted into aligned holes to hold two pieces together?
Dowel joints use round wooden pins (dowels) glued into matching holes in each piece to align and strengthen the connection, common in furniture assembly.
11. What is a finger (box) joint?
Finger joints (box joints) increase glue area by using interlocking square fingers, often used for box corners or to join end-to-end.
12. Which adhesive is most commonly used for joining indoor wooden furniture in Kenyan schools?
PVA wood glue is widely used for interior timber joints because it bonds well to wood, is easy to use, and is inexpensive for school workshops.
13. Which joint is most suitable when extending the length of a timber strip for a long tabletop?
Finger joints provide a large glued surface for end-to-end joining, giving good strength and are often used to join short boards into longer lengths.
14. What is the main purpose of a scarf joint in carpentry?
A scarf joint overlaps tapered ends to produce a smooth, relatively strong connection used where long timbers are required but only shorter lengths are available.
15. Which joint gives the neatest visible corner while hiding reinforcement and is often used in modern casework?
Reinforced miter joints use biscuits or dowels hidden inside the corner to strengthen the 45Ā° joint while keeping an uninterrupted external corner appearance.
16. How can the strength of a glued joint be improved during assembly?
Proper clamping ensures close contact across the joint and correct curing time lets the adhesive reach full strengthāboth essential for a strong glued joint.
17. Why is a rebate commonly cut in window frames and cabinet backs?
A rebate forms a ledge that glass or a panel can sit on and be fixed, commonly used in window sashes and cabinet construction.
18. Which joint is both decorative and strong for visible corners of fine cabinetry, especially drawers?
Dovetail joints are highly resistant to pulling forces and are also considered attractive, so they are often used where appearance and strength matter, like drawers.
19. What is a mortise in the mortise and tenon joint?
The mortise is the cavity that accepts the tenon; together they form a strong interlocking joint used in furniture and frames.
20. What is a tenon?
A tenon is the male part of a mortise and tenon joint; it projects from one piece and is inserted into the mortise of another.
21. Which joint is commonly used to join short lengths of timber to form long mouldings and is often machine-made?
Finger joints are often produced by machines to join short off-cuts into long lengths for mouldings and trim because they give good glued strength.
22. What is a spline and why is it used with miter joints?
A spline is a piece of wood fitted into matching slots across two mitered faces to strengthen the joint and help align the pieces during glue-up.
23. Which joint is weakest on its own and usually needs reinforcement for furniture?
A plain butt joint has minimal glue surface and no mechanical interlock, making it weak unless reinforced with screws, dowels, biscuits or plates.
24. What is an important safety practice when cutting joints using a saw or chisel?
Clamping prevents the workpiece from moving, reducing the risk of slips or kickbacks and making cuts more accurateābasic workshop safety.
25. Which joint would you cut (a small rectangular recess) into a door frame to fit a hinge?
A hinge mortise is a shallow pocket cut into the edge or face of the door/frame so the hinge sits flush and the door operates smoothly.
26. At what angle are the two pieces cut for a standard miter joint used in frames?
A standard miter for a right-angle corner requires cutting each piece at 45Ā° so they join to form a neat 90Ā° corner, as in picture frames.