Agricultural Technology Paper 1 (English)

Feb-March 2018 — Grade 12 / Matric — Agricultural Technology

Past Paper 2018 Grade 12 English

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1.1This question paper consists of TWO sections, namely SECTION and SECTION B.

1.2BOTH sections are COMPULSORY

1.3Answer ALL the questions in the ANSWER BOOK.

1.4Number the answers correctly according to the numbering system used in this question paper.

1.5You may use a non programmable calcu lator.

1.6Write neatly and legibly. 2. SECTION A: SHORT QUESTIONS

2.1This section consists of THREE questions.

2.2Follow the instructions when answering the questions. 3. SECTION B: STRUCTURED LONG QUESTIONS

3.1This secti on consists of FIVE questions.

3.2Start EACH question on a NEW page. Agricultural Technology DBE/Feb. Mar. 2018 NSC Copyright reserved Please turn over SECTION A

Q1— Section header —

1.1Various options are provided as possible answers to the following questions. Choose the answer and write only the letter (A D\ next to the question number (1.1.1

1.1.10\in the ANSWER BOOK, for example 1.1.11 D.

1.1.1Steel is resistant to air, water and chemicals.

1.1.2The preferred plastic for the m anufacturing of heat resistant handles

1.1.3ONE of the following is NOT an advantage of Vesconite Corro sion resistant and non

1.1.4The best type of fire extinguisher to be kept in a welding workshop is a /an oxygen(O

1.1.5Which ONE of the following should NOT appear on an electric ity safety sign?

1.1.6gears can be changed while the vehicle is moving. differential

1.1.7oxyacetylene set. Argon Oxygen Acetylene Helium

1.1.8Pneumatic tools operate with ... pressure. air oil hydraulic water

1.1.9The hub lock mechanism of a 4x4 vehicle is located

1.1.10The function of the sensitivity element on a tractor is to control the depth of the implement according to immediate soil conditions. adjust the cross angle of the implement in relation to the tractor

1.2Change the UNDERLINED word(s\ in each of the following statements to make the statements TRUE. Write only the word(s\ next to the question number (1.2.1

1.2.5\n the ANSWER BOOK, for example 1.2.6 Tractor.

1.2.1Electronic d evices like radios can be used to activate the centre

1.2.2tretching of the belt is a common problem when using this type of

1.2.3Pure ethanol is commonly used as racing fuel.

1.2.4The side of the hydraulic cyli nder which contains the shaft, is stronger than the other side, because of the smaller contact

1.2.5An oil fire should be extinguished with foam fire extinguisher (5 x 2\

1.3.5\ the ANSWER BOOK, for example 1.3.6 COLUMN A COLUMN B 1. .1 1.

1.3.3

1.3.4 .3 .5 Battery acid, pesticides and solvents can lead to health hazards

Q2— Section header —

2.1Name FOUR safety properties that i nsulation material used in the roofs of buildings must adhere to.

2.2Electric fencing protect what is kept i nside and keep certain unwanted elements out.

2.2.1Recommend TWO measures to ensur that humans do NOT accidently come into c ontact with an electric fence.

2.2.2Explain the use of ceramic isolator s between the wire and the post of an elec tric fence (2\

2.2.3Briefly d iscuss the function of the appliance in the photograph below (2\

2.2.4Describe what will happen to a person when he/she touch es an electric fence if the amperage is too high.

2.2.5A battery , similar to the one below, can be used as a power source for an electric fence energi er. Name TWO types of batteries that can be used. (2\

2.2Explain the factors that have an influence on the earth return sy stem of an electric fence. (4\

2.2Describe THREE ways of increasing the earth efficiency of an electric fence in particularly poor earth conditions like very dry soil. (3\

2.3Teflon is a invention of chemical engineering and innovation. Name FOUR uses of Teflon on a farm.

2.4Vesconite is a thermoplastic made from polymers. Name THREE applications of Vesconite on farm implements. (3\ 2. Explain why bronze is

Q3— Section header —

3.1.1Name FIVE different types of renewable energy sources used by modern society. (5\

3.1.2What should NOT be done when you extract steam and hot water from geothermal source to protect it from cooling down too much

3.2The photograph below shows solar energy cells that provid es electricity.

3.2.1Explain the factors that have a negat ive influence on the effectiveness of solar energy

3.2.2Name TWO types of energy that are directly generated from solar energy. (2\ 3. .3 Name device used with solar panels that change

Q4— Section header —

4.1The questions below refer to etal nert

4.1.1Name the THREE most possible causes of poor penetration during MIG welding. (3\

4.1.2Why is it NOT necessary to use additional flux when doing MIG welding

4.1.3Give TWO reasons why MIG welding is quicker than conventional arc welding. (2\

4.1.4Name the type of material used for manufacturing suitable protective clothing for welding. (1\

4.1.5Give reason for your answer to QUESTION

4.1.4(1\

4.1.6Explain why a little metal ball as seen in the photo graph below

4.1Describe TWO method s to remove the metal ball from

4.1

4.2A welded joint on a planter has to be smoothed with the angle grinder as shown below. Explain how you will achieve a neat final product. (5\

4.3Describe the overhead arc welding procedure in the diagram below (4\ Agricultural Technology 12 DBE/Feb. Mar. 2018

4.4Below is a diagram of a n oxyacetylene cutt ing set.

4.4.1Recommend a device that can be used to light the flame of oxyacetylene torch

4.4.2Explain why it is NOT advisable to use a cigarette lighter or matches when igniting

4.4.3iscuss the procedure that must be followed to shut down the oxy cetylene equipment after welding is finished

4.5Explain how you will deal with hazardous gases when using a plasma cutt er

Q5— Section header —

5.1Study the photograph of a ram baler below and answer the questions that follow.

5.1.1Identify component (1\

5.1.2Explai n the function of the ram. (2\

5.1.3Name TWO functions of the slip clutch found in the drive mechanism of a baling machine. (2\

5.1.4escribe E procedures that must be followed before baler is

5.2Explain why it is necessary to use a four wheel drive tractor with a front end loader

5.3A farmer wants to pump water from a river with an electrical motor and ce ntrifugal pump. The diameter of pulley on the electric motor is 200 mm and the speed is

5.3.1Calculate the dia meter of pulley on the pump. Show ALL calculations. Use the formula: Na x Da = Ng x Dg

5.3.2The drive between the motor and the p ump in the sketch above is brought about by V belts. Name FOUR dvantages of

5.4The diagram below shows a plough hitched to a tractor.

5.4.1Analy e the diagram carefully and explain what arrow

5.4.2State THREE ways in which a farmer can change a tractor s mass displacement positively.

5.4.3Name THREE facto rs that have an influence on the forward movement of the tractor when plo ugh ing

Q6— Section header —

6.1Name FOUR types of filtering systems that are used to purify water for human consumption and describe the working of ACH (8\

6.2What does GIS stand for and discuss how you would use it in a modern farming enterprise (5\

6.3Explain why a farmer must determine the flow rate of water in an irrigation system (2\

6.4Answer the questions below regarding septi c drain used on farms to treat raw household sewage.

6.4.1Name the most important substance found in any septic drain that ensures that it will function properly. (1\

6.4.2Describe the function of the distribution box of a septic drain. (3\

6.4.3Name THREE places where a septic drain should NOT be build. (3\

6.5Below is a photo graph of an irrigation timer.

6.5.1Explain the use of the irrigation timer above. (2\

6.5.2Name TWO basic types of irrigation timers that can be used on a farm. (2\

6.5.3List FOUR different types of irrigation systems. (4\ [30] TOTAL SECTION B: GRAND TOTAL: 160 20030

Topics Identified

Plant ProductionAgricultural ManagementSoil Science

Mark Allocation

Total160 marks

Sections35 + 20 + 35 + 40 + 30 = 160 marks

Paper information

SubjectAgricultural Technology

Year2018

SessionFeb-March

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages15

Downloads4

Examination context

Decade2010s

Years ago8y

Season—

Start day—

Exam period—

Days since exam—

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Corresponding marking memorandum

Marking memorandum available

Use the corresponding memorandum after completing the paper to review your answers and identify areas that require further revision. The memorandum shows the marking approach used by DBE examiners, including method-mark allocations.

Agricultural Technology Memo 1 (English) →

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