The picture below shows a ram type of baler - NSC Agricultural Technology - Question 5 - 2021 - Paper 1

1. The screens must appear neat and be free from damages for effective safeguarding.
2. They should be removable and replaceable easily to facilitate maintenance.
3. The screens should have clear warning signs to indicate potential dangers.

1. Slip clutch mechanism to prevent overload.
2. Shear bolts that allow for controlled disengagement during a jam.
3. Guards to shield workers from moving parts.
4. Warning systems that alert operators of potential hazards.

1. Ensure operators do not ride on top of the harvester to avoid accidents.
2. Maintain a safe distance from moving parts to prevent entanglement.
3. Regularly check the mechanical components for issues before use.
4. Always switch off the machine during maintenance.

The gear exhibited is a double-helical gear, commonly referred to as a herringbone gear.

One disadvantage of the double-helical gear is that it cannot be used in gearboxes of cars since it cannot be meshed from the side.

1. The construction must be sturdy to ensure durability.
2. It should have replaceable components to allow for easy repairs.
3. The rotor housing should close tightly to prevent operational issues.
4. The availability of parts for future maintenance must be guaranteed.

1. The mass of feed is spread equally over bearings, improving functionality.
2. It minimizes vibrations that could lead to mechanical failures.
3. Ensures the mill operates efficiently without uneven wear.

1. Ensure that the anchor bolts of the static machine are tight to prevent disconnection.
2. Check that the universal joints are well lubricated to allow smooth operation.
3. Ensure the driving shaft is straight to avoid operational inefficiencies.

1. The rear tyres of a tractor are better suited to carry heavier loads safely, reducing the risk of tipping.
2. The device minimizes the chances of damage during transport due to its stability.

1. Two lifting arms that raise or lower the implement.
2. A top link that connects the implement to the tractor's framework.
3. Two stabilising chains or arms that secure the implement in place.

The automatic depth control mechanism operates by using sensitivity elements that monitor the depth of ploughing, adjusting as necessary to maintain consistent depth. If the plough penetrates too deeply in soft soil, the mechanism will lift the plough slightly, and conversely, if the plough does not go deep enough, the mechanism will lower it to achieve the desired working depth.

Installing bearings is essential to reduce wear from moving parts, enable smooth functionality, and prevent overheating which could lead to malfunction.

One task is to apply appropriate lubricant to ensure minimal friction and extend the life of the bearing.

1. Sliding gearbox, which allows for smooth transitions between gears.
2. Constant mesh gearbox that keeps all gears in mesh and allows for shifting without stopping.
3. Synchronized gearbox that prevents gears from grinding during shifting.