Question 1: Describe the process of cutting a piece of wood using a hand saw. What safety precautions should you take?

Answer: The process involves firmly holding the wood and moving the saw back and forth along the marked cut line. Safety precautions include wearing safety goggles, keeping fingers away from the blade, and maintaining a steady, controlled motion.

Question 2: Explain how sanding can be used to improve the surface finish of a wooden object.

Answer: Sanding involves rubbing a rough surface with abrasive paper to smooth out imperfections, remove splinters, and create an even, polished surface.

Question 3: Sketch a simple plan for a small box with a lid. Indicate where you would join the sides.

Answer: A correct sketch would show a rectangular box with four sides and a lid on top. The joinings could be indicated as either glued, nailed, or jointed with corner blocks. The plan should clearly show the placement of all sides and the lid.

Question 4: Describe the technique of using a soldering iron in making electronic circuits. What safety measures are important?

Answer: Using a soldering iron involves heating the tip and applying it to melt solder onto electrical connections, joining components. Safety measures include wearing eye protection, working in a well-ventilated area, and handling the hot iron carefully to avoid burns.

Question 5: Draw a cross-section of a simple plastic container to show how heat might be used during its manufacturing process.

Answer: A correct sketch would show a plastic mold with the molten plastic being poured or injected into it. The cross-section should depict the mold shape, the plastic inside, and possibly a heating element or heat source around the mold.

Question 6: Explain how the technique of pressing or stamping is used in metalworking to create patterns or shapes.

Answer: Pressing or stamping involves pressing a die onto a metal sheet or piece to deform it into a specific shape or pattern, often using a hydraulic or mechanical press.

Question 7: Design Brief: You need to create a durable and lightweight school bag. Which technique would you use for the main body and why?

Answer: A suitable technique would be using fabric cutting and sewing for lightweight construction, combined with reinforced areas using heat pressing or bonding. This ensures durability while keeping the bag lightweight.

Question 8: Describe the process of joining two pieces of plastic using adhesive. What factors affect the strength of the joint?

Answer: Applying an appropriate plastic adhesive to the surface and pressing the pieces together until it sets creates a bond. Factors affecting strength include surface cleanliness, adhesive type, application thickness, and curing time.

Question 9: Sketch a simple diagram showing how a wheel could be attached to an axle using a key and a washer. Label the parts clearly.

Answer: The sketch should depict a wheel fitted onto an axle with a key fitting into a slot on the axle and the wheel, a washer placed against the wheel to tighten the fit. Labels should include 'axle', 'key', 'washer', and 'wheel'.

Question 10: Explain how heat treatment can change the properties of metal and give an example of a product that benefits from this process.

Answer: Heat treatment involves heating and cooling metal to alter its hardness, strength, or ductility. For example, steel used in tools is heat-treated to increase hardness and durability.