4.1 Study the pictures below and provide an applicable accident-preventing safety regulation for each situation - NSC Agricultural Technology - Question 4 - 2016 - Paper 1

Do not overload electrical wall sockets. Overloading can lead to short circuits and potential fires.

Avoid touching electrical fences with your bare hands to prevent electric shocks.

Prevent tractors from tipping over by not driving against steep slopes.

The plasma cutting process utilizes a tungsten electrode and high-pressure plasma gas, which generates and carries an electrical arc between the nozzle and the workpiece. The electrical arc performs the cutting, while the pressurized plasma helps remove melting impurities from the cut.

1. Gun/Pistol
2. Sprout
3. Filling wire guide
4. Copper contact tip
5. Filler wire

1. High carbon alloy steel (stainless alloys)
2. Aluminium
3. Mild steel

1. Higher welding speeds.
2. Greater deposition rates.
3. Better weld pool visibility.

To cut a 20 mm thick mild steel plate using oxyacetylene: First, ignite the flame and adjust it to a carburising flame. Next, heat the material until it glows red. Introduce oxygen by pulling a lever on the cutting attachment, which ignites the steel and transforms it into a liquid. The iron produced is expelled from the cut by the pressure from the oxygen stream.

Ensure that the pieces to be welded are cut to the correct measurements and are ready for welding. The workpieces should be prepped correctly with a root gap and a V-groove on both sides. Align the pieces and secure them in place. Apply the arc with suitable amperage and maintain the electric contact on the workpiece throughout the welding procedure.

1. Longitudinal shrinking
2. Angular shrinking