FIGURE 4.1 below shows two woodworking machines - NSC Civil Technology Woodworking - Question 4 - 2019 - Paper 1

1. Cleaning the Blade: It is essential to clean the jigsaw blade after each use to prevent buildup of resin and debris, which can affect performance.

2. Secure Usage: Ensure that the blade is securely tightened and not bent before operation to avoid malfunction or accidents.

1. Tightness of Work Piece: Ensure that the work piece is securely clamped or held to prevent movement during operation, which could lead to injury.

2. Tool Lock: Check that the tool is locked as close as possible to the work piece/stock to ensure stability while tooling.

Store the belt sander in a place where it cannot be damaged by dirt or dust, ideally in a dust-free environment.

1. Strength: The ability of the material to withstand forces without deforming or breaking.

2. Density: The mass per unit volume of the material, which affects its overall performance.

1. Sanding the Surface: Remove all surface defects by sanding until the surface is smooth and free from scratches.

2. Cleaning the Timber: Ensure that the timber is free from dust and debris to allow effective application of preservatives.

3. Inspecting for Damage: Check the timber for any signs of rot or damage which may affect the preservative's effectiveness.

A conventional trap door consists of a panel that can be pushed up, while a hinged trap door opens upwards or downwards by pivoting around its hinges.

1. Panel: The main section that covers the opening.

2. Cover Strip: The edging or frame that secures the panel in place.

1. King post: 114 mm x 38 mm

2. Brander: 38 mm x 38 mm or 38 mm x 50 mm.

1. Hurricane Clips: Used for securing purlins to rafters (roof truss) to enhance the structural integrity during storms.

2. Storm Clips: Employed for securing roof tiles to the battens, ensuring they remain in place during high winds.