4.1 Identify the tool - NSC Civil Technology Woodworking - Question 4 - 2020 - Paper 1

If personal safety equipment is not worn, various hazards can occur:

1. Dust and debris can cause significant eye injuries and bodily harm.
2. Inhalation of dust may result in lung damage over time.
3. Loose clothing can get caught in moving parts of the machine, posing a serious risk of injury.

This hand tool should be stored in a safe, dry place to:

1. Prevent damage from corrosion or rust due to moisture.
2. Ensure the tool remains functional by protecting its moving parts from dirt and dust.
3. Avoid potential accidents or malfunction caused by improper storage.

If the height of the table of the thickness planer is adjusted while it is in operation:

1. It can cause serious injury to the operator.
2. It may lead to blockage of the wood being processed.
3. The machine may stop functioning properly, risking damage to both the material and the machine itself.

To maximize the use of the blades of the thickness planer, one must:

1. Ensure that timber is free from any metal objects before operation.
2. Regularly check and maintain the sharpness of the blades.
3. Make sure the blades are properly tightened and secured before use.

4.3.1 Tiled roofs: Polypropylene or plastic membrane.

4.3.2 Thatch roofs: A synthetic/plastic membrane or material waterproofing membrane.

4.3.3 IBR roof sheeting: Aluminum foil or any other fire proof material.

This task requires a drawing. The top view must demonstrate the inclined roofs converging at a valley. Ensure the valley is correctly depicted, following the assessment criteria provided.

One reason for closing an open eave is that it provides a more attractive finish to the overall appearance of the building.

Fibre-cement ceiling boards are preferred because:

1. They are water resistant, reducing the risks of decay.
2. Fibre-cement boards do not require frequent maintenance unlike gypsum boards, which might need upkeep once exposed to moisture.

4.7.1 Concrete roof tiles:

• They are quite prone to chemical weathering.
• They are usually heavier than other materials, making installation more challenging.

4.7.2 Thatch roofs:

• They need regular rehatching of the ridge, increasing maintenance effort.
• They are more susceptible to decay than other materials due to their organic composition.

4.7.3 Corrugated iron sheeting:

• Sharp edges can pose a danger to users.
• If not properly secured, it may bend or break when stepped on.

• Tie beam
• Branding

Mechanically graded timber provides several advantages:

1. It ensures the quality and strength of the timber is consistent and verified.
2. It offers a more reliable and precise method of grading, leading to safer construction practices.

Timber must be preserved to:

1. Prevent it from fungal growth and pests that can cause degradation.
2. Extend its lifespan and maintain its structural integrity against environmental factors.

This task requires a drawing to be performed on the ANSWER SHEET. Ensure adherence to the scale and follow the lines provided accurately.