The picture below shows a hammer mill that is used to pulverise silage - NSC Agricultural Technology - Question 5 - 2017 - Paper 1
Question 5
The picture below shows a hammer mill that is used to pulverise silage. Answer the questions that follow.
A
5.1.1 Identify component A in the picture above.
5.1.2... show full transcript
Worked Solution & Example Answer:The picture below shows a hammer mill that is used to pulverise silage - NSC Agricultural Technology - Question 5 - 2017 - Paper 1
Step 1
5.1.1 Identify component A in the picture above.
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Answer
Component A is the Cyclone/Dust/Air Outlet.
Step 2
5.1.2 Describe the function of the component identified in QUESTION 5.1.1.
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Answer
The function of the Cyclone/Dust/Air Outlet is to effectively separate the grounded material from the air or dust particles, ensuring that only the grounded material is released.
Step 3
5.1.3 State the function of the following components of a hammer mill:
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A. Sieves: They determine the size of the final grounded product by filtering out larger particles.
B. Hammers: They pulverize the fodder into smaller pieces.
C. Fan: It helps in blowing the pulverized material through the sieves and out of the dust outlet.
Step 4
5.2 Name TWO essential clothing items for personal protection that must be worn when using a push lawnmower.
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Safety boots/shoes
Long pants/overalls
Step 5
5.3 Tabulate the differences between Bale A and Bale B, shown in the pictures below, under the following headings:
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Bale A
Bale B
5.3.1 Storage space needed
Storage space optimally utilized
Loss of space between bales
5.3.2 Bale handling
Bales handled manually
Bales handled with tractor
5.3.3 Rope consumption
Low rope consumption
High rope consumption
Step 6
5.4 State TWO functions of the type of slip clutch shown in the sketch below.
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Answer
To prevent heavy objects from being taken into the baler.
To protect the pick-up if it is impeded by anything.
Step 7
5.5 State FOUR general problems that can occur when using the combine harvester below.
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Loss of maize kernels due to blowers that are set incorrectly.
Thresher that breaks the kernels.
Mechanical problems.
Cannot harvest when it has rained.
Step 8
5.6.1 Name the mechanism in the sketch above that is used to hitch an implement to a tractor.
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Answer
The mechanism used to hitch an implement to a tractor is the three-point mechanism.
Step 9
5.6.2 Name components A, B and C, as shown in the sketch above, and state the function of EACH.
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A. Top link: It is used to lift or lower the rear of the implement.
B. Levelling box: It adjusts the cross-angle of the implement in relation to the tractor.
C. Draw bars/lifting arms: They hitch the implement to the tractor.
Step 10
5.7.1 Give ONE reason why air must be removed from a hydraulic system.
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Air is compressible and will influence the operation of the system, potentially leading to a loss of efficiency.
Step 11
5.7.2 Which side of this cylinder is the strongest: A or B?
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A is the strongest side of the cylinder.
Step 12
5.7.3 Explain your answer to QUESTION 5.7.2.
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This is because the area that is subjected to the oil pressure in the cylinder is larger on this side.
Step 13
5.7.4 Where this type of cylinder can be used and an explanation for the choice.
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This type of cylinder can be used in a Planter where movement is needed in both directions to allow for effective planting operations.
Step 14
5.8 State THREE factors that can cause a decrease in the value of a tractor.
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As soon as a tractor leaves the supplier it is second-hand.
Wear on the engine, tyres etc.
New tractor models with better features come into the market.
Step 15
5.9 Calculate the diameter of the driven pulley by using the formula below. Show ALL calculations.
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Answer
Using the formula:
Na×Da=Nb×Db
Substituting the values:
4000×70=2000×Db
Solving for Db:
Db=20004000×70=140 mm
Step 16
5.10 What will happen to the load on the left-hand side if pulley A on the right-hand side is turned clockwise?
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