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5.1 Describe how you will maintain the implement shown below - NSC Agricultural Technology - Question 5 - 2020 - Paper 1
Question 5
5.1 Describe how you will maintain the implement shown below. 5.2 The pictures below show two types of baling machines. 5.2.1 Redraw the table below in the ANSWER ... show full transcript
Worked Solution & Example Answer:5.1 Describe how you will maintain the implement shown below - NSC Agricultural Technology - Question 5 - 2020 - Paper 1
Step 1
Describe how you will maintain the implement shown below.
Answer
To maintain the implement, regularly lubricate all moving parts to ensure smooth operation. Additionally, sharpen all blades to allow for efficient cutting. It is crucial to inspect the screens routinely, ensuring that they are clear and functioning correctly. Remove any foreign objects that may impede operation, and repaint any damaged surfaces to prevent corrosion. Repair any broken or damaged parts immediately and store the implement away from direct sunlight and rain to protect it from the elements. Additionally, check for vibrations during use and clean the implement after each use, while also inspecting chains for wear.
Step 2
Redraw the table below in the ANSWER BOOK. Complete the table by comparing the two baling machines under the given headings.
Answer
| BALING MACHINE A | BALING MACHINE B |
|---|---|
| Difficult to transport | Easy to transport |
| Smaller loads, takes more space | Larger loads, optimised space |
| Can wrap | Cannot wrap |
| Mechanical handling | Hand by hand |
Step 3
How is bale density changed in BALING MACHINE B?
Answer
In Baling Machine B, bale density is altered by adjusting the resistance to the hay within the baling chamber. This can be achieved through changes in the belt tension or by adjusting the speed of the feeding mechanism, which dictates how tightly the hay is compressed into bales.
Step 4
Discuss the function of the slip clutch fitted between the PTO shaft and the flywheel of BALING MACHINE B.
Answer
The slip clutch serves a safety function by preventing damage to the drive mechanisms of the baler in the event of an obstruction. When excessive torque is applied, the slip clutch disengages, allowing the PTO shaft to continue turning without transmitting force to the baler. This mechanism protects both the machine and the operator, ensuring a smoother operation.
Step 5
Describe THREE safety measures that should be followed when working with the silage cutter shown below.
Answer
When working with the silage cutter, it is essential to ensure only the driver operates the machine to minimize distractions. Additionally, safety screens should be checked to ensure they are in place and functioning correctly to protect against flying debris. Lastly, it is vital to keep people and animals at a safe distance from the operational area of the cutter, minimizing the risk of accidents.
Step 6
Discuss FIVE major problems that can occur during the harvesting of wheat when using the machine shown below.
Answer
Several challenges can arise while harvesting wheat, such as:
- Loss of grain due to improper settings on the blowers, leading to grain not being collected effectively.
- Threshing issues, where the machine may fail to adequately separate the grain from the chaff.
- The presence of too many foreign particles can clog the machine, requiring frequent clean-outs.
- Mechanical problems, such as breakdowns or malfunctions, that can halt the harvesting process.
- Difficulty in harvesting wet grain, which can lead to a higher chance of spoilage and operational inefficiency.
Step 7
Briefly describe how the double-acting hydraulic cylinder works.
Answer
The double-acting hydraulic cylinder operates by directing pressurized oil into either side of the cylinder, allowing it to extend or retract. When the control lever is in the neutral position, oil from the pump is directed to a return line and back to the oil reservoir via the filter. When the lever shifts to one side, oil flows to one piston side to push the rod out while the other side allows fluid to return to the tank, enabling controlled movement in both directions.
Step 8
Which side of the double-acting hydraulic cylinder is the strongest? Motivate your answer.
Answer
The front side of the double-acting hydraulic cylinder is typically stronger during operation. This is because it has a larger area subjected to pressure, allowing it to generate more force compared to the pull direction. The effective pressure increases the lifting capability when the oil is directed towards the larger piston area.
Step 9
Describe THREE ways to positively change a tractor's mass displacement.
Answer
To positively alter a tractor's mass displacement, one can:
- Decrease the tow bar pulling force to enhance weight distribution.
- Lower the rear tow bar which can help in balancing the tractor's weight.
- Add weights or water into the wheels to increase overall mass without altering the tractor's size.
Step 10
What will happen if the top link between the tractor and the plough is removed?
Answer
If the top link is removed, the plough will lose its stability. The nose of the tractor will lift up while the back of the plough will likely remain on the ground. This misalignment can lead to inefficient ploughing and may cause damage to the implement or the tractor.
Step 11
Choose the tractor, A or B, which would be most suitable for mounting a front-end loader system. Motivate your answer.
Answer
Tractor A would be more suitable for a front-end loader system because it has an all-wheel drive capability, enhancing its grip and stability. It also offers a robust front suspension system capable of handling heavier loads, making it versatile for various tasks compared to Tractor B.
Step 12
Why are V-belts preferred to flat belts?
Answer
V-belts are favored over flat belts due to several advantages: they do not easily slip off pulleys, provide tighter grip under variable loads, require less lubrication, and are generally stronger for power transmission. Additionally, V-belts tend to have a longer lifespan, making them more reliable and cost-effective in the long run.
Step 13
Why the exhaust pipe of tractor is longer than the air-intake pipe.
Answer
The longer exhaust pipe helps to ensure that harmful fumes and smoke do not re-enter the engine intake during operation. This design assists in the proper expulsion of exhaust gases while maintaining engine efficiency and protecting the operator from harmful emissions.