GRADE 9 Pre-technical – HOLDING TOOLS Quiz
1. What is the main purpose of a bench vice (vise) in a workshop?
A bench vice is designed to grip and hold objects steady so you can file, saw, drill or shape them safely and accurately.
2. Which holding tool is best for clamping two pieces of timber together while glue dries?
Bar clamps (or sash clamps) spread pressure over a larger area and have a sliding jaw, making them ideal for holding timber assemblies tightly and evenly during glue-ups.
3. Which tool is most suitable for holding round pipes without crushing them?
A pipe vice is made to grip round tubing securely using shaped jaws or a chain so the pipe is held firmly without being flattened.
4. What is the primary use of a lathe chuck?
A lathe chuck grips the workpiece concentric to the spindle so it can be rotated accurately for turning operations.
5. Why would you fit soft jaws or jaw pads to a bench vice?
Soft jaws or pads (leather, copper, aluminium) cushion the contact so delicate or finished surfaces are not scratched or dented while being held.
6. When drilling a round bar in a pillar drill, which holding tool helps prevent the bar from rotating?
A V-block supports round bars in a stable vee and a clamp prevents the bar from turning while drilling, giving a safer and more accurate hole.
7. What does a collet do when fitted in a machine tool?
Collets squeeze uniformly around a round tool or workpiece, giving accurate centering and grip for precision machines like milling machines and lathes.
8. Which clamp gives quick clamping and release and is useful for holding small parts during glueing?
Spring clamps are light, quick to apply and release, and are commonly used in schools and small workshops for temporary holding during glueing of small pieces.
9. For holding two metal plates at a right angle while welding, which holding tool is most suitable?
A right-angle clamp keeps two pieces at 90° so they stay square and in position while welding or tack-welding the joint.
10. What is the purpose of a steady rest on a lathe?
A steady rest supports the workpiece near the cutting area so it does not deflect, ensuring accurate turning on long shafts.
11. Which holding tool uses a sliding bar and a screw to apply clamping pressure for woodworking?
Bar clamps have a long bar with a fixed jaw and a sliding jaw tightened by a screw—ideal for clamping long pieces of timber together.
12. How should a workpiece be placed in a bench vice for safe sawing with a hacksaw?
Minimising overhang reduces vibration and helps the piece stay straight; supporting the free end prevents bending or snapping during sawing.
13. Which holding tool is best for holding small round items like screws or small shafts for filing or drilling by hand?
A hand vice is made for small workpieces that you need to hold securely while filing, drilling or shaping by hand.
14. What is correct maintenance to keep a bench vice working properly?
Cleaning and lubrication prevent rust, reduce wear, and ensure the screw and sliding parts move smoothly and clamp reliably.
15. When clamping thin metal sheets, what should you do to avoid damaging them?
Padding spreads the pressure and prevents the jaws from digging in, which protects thin or finished surfaces from dents and marks.
16. Which device gives quick, repeatable holding for production work at a bench?
Jigs and fixtures are made to hold parts in the same position repeatedly and accurately, improving speed and consistency in production.
17. When turning a piece between centres on a lathe, what is used to support the tailstock end?
The tailstock centre supports the far end of the work and ensures it turns accurately between the headstock and tailstock centres.
18. Which clamp is commonly used to provide high clamping force for securing heavy metal workpieces during fabrication?
G-clamps (also called C-clamps) are strong, simple screw clamps that can apply high pressure and are often used in metalwork for heavy clamping.
19. What is the main danger if a workpiece is not held securely while you are working on it?
A loose workpiece can slip or spin, leading to accidents, damaged tools, and incorrect or unsafe work.
20. Which device is useful for holding ferrous sheet metal flat on a steel bench while filing or grinding?
Magnetic clamps stick to the steel bench and hold ferrous sheets flat without clamping pressure that might bend or mark the sheet.
21. Why place copper or leather between vice jaws and a polished workpiece when clamping?
Soft pads protect the finish and help distribute clamping force so the workpiece is not indented or scratched by the jaws.
22. Which holding tool is specifically made to be used on a pillar drill for accurate drilling?
A drill press vice is designed to mount on the drill table and hold work squarely under the drill for straight, accurate holes.
23. What is the safest way to file a small metal piece?
A vice holds the work steady and filing away from your body reduces the chance of slipping and injury.
24. Why must you remove the chuck key immediately after tightening the lathe chuck?
A chuck key left in place becomes a dangerous projectile when the spindle is started; always remove it and keep it in a safe place.
25. Which device is used to support and hold long cylindrical pieces for marking out or machining on a bench?
V-blocks are shaped to hold round bars securely and are used for marking, measuring and machining operations on cylindrical pieces.