Agricultural Technology Paper 1 (English)

November 2015 — Grade 12 / Matric — Agricultural Technology

Past Paper 2015 Grade 12 English

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🎯 200 marks ⏱️ 3h 📄 19 pages 📝 118 items found 📚 2 topics

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1.1This question paper consists of TWO sections, namely SECTION A d 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 n programmable calculator.

1.6rite neatly and legibly. SECTION A: SHORT QUESTIONS

2.1This section consists of THREE questions.

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

3.1This section consists of FIVE questi ons.

3.2Start EACH question on a NEW page. Ag NS

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 th e ANSWER BOOK, for example 1.1.11 B.

1.1.1ccording to regulations in the Occupational Health and Safety A 1993 (Act 85 of 1993\ the noise level experienced in a workshop is classified as too loud when a cell phone cannot be heard ringing.

1.1.2A plasma cutting machine operates by using very high voltage a jet of water to cool the work piece. low amperage. an oxy

1.1.3An advantage of using a MIG welder is that copper can be welded. very thick metal can be welded. the initial setup cost is very low. flux has to be removed after welding.

1.1.4The tip of MIG weld ing torch is covered with a ... which protects the electrode and directs the flow of gas

1.1.5An example of a bio fuel crop that can be used as an alternative to diesel Maize Sunflower seed Sugar cane Woody plant fibre Ag

1.1.6ONE of the following does NOT cause tractor to turn onto i ts side because of a change in the tractor's centre of gravity

1.1.7such as harassment is a health hazard that can cause occupational illnesses. Workplace stress Bio hazards Physical agents Chemical hazards

1.1.8he speed ratio of a gear assembly if th e drive gear has teeth and the driven gear has teeth:

1.1.9The prescribed mixin g ratio on a container of Round up herbicide is water in a knapsack sprayer:

1.1.10The background colour of safety signs on electrical fences that warn le against electrical shock: Yellow Black White Red (10 x 2\ (20\

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

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

1.2.1A pure chromium welding rod is used to weld broken or cracked cast iron parts.

1.2.2Household s ewage in a septic tank is broken down by acids

1.2.3The top link is used to adjust the cross angle of an implement in relation to a tractor.

1.2.4variable rate technology system is used to determine exact location by using various satellites.

1.2.5The rotor of wind turbine is connected to a main shaft that spins a motor that generates electric ity. (5 x 2\

1.3Choose a word/term from COLUMN B that matches the description in COLUMN A. Write only the letter (A G\ next to the question numb er (1.3.1

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

1.3.5House the guard plates and wearing plates of a hammer mill Facilitate the process of feeding raw material into hammer mill

Q2— Section header —

2.1The instrument below shows that copper is used in many application s in and around the house.

2.1.1Write down the material that is added to copper to form the following (a\ (b\ Brass Bronze (2\

2.1.2Name TWO methods that can be used to permanently join copper products. (2\

2.1Name a substance that can dissolve tin. (1\

2.2There is a crack in the diesel tank of your tractor and you need an adhesive to temporarily repair the crack.

2.2.1State the TWO most important aspects that must be considered when an adhesive i s chosen to repair the diesel tank. (2\

2.2.2Explain the process of preparing the diesel tank before the adhesive is applied. (1\

2.3Descri be the following properties of V esconite:

2.3.1Delamination ability (2\

2.3.2Friction ability (2\

2.3.3

2.4Electric fencing is a very effective method of safeguarding animals and can be used in various temporary and permanent applications.

2.4.1Suggest TWO methods of preventing lightni ng dama ge to electric fence energis er. (2\

2.4.2Discuss the procedure to follow when testing the earth ing system of an electric fence. (4\

2.4.3Briefly d escribe the earth return system of an electric fence and state TWO probable causes of a voltage drop in the electric fence circuit (3\

2.5The wire of an electric fence must be very stro ng because of the high tension n the wire.

2.5.1Indicate the correct type of fence wire used to erect an electric fence. (1\

2.5.2State the prescribed minimum thickness of the wire used for an electric fence. (1\

2.5.3Suggest TWO methods that can be used to protect the bare wires of an electric fence against corrosion. (2\

2.6Insulating material used o n the ceiling o f a farm building to keep the building cool during summer and warm during winter must adhere to certain safety requirements. List FOUR of these safety requirements.

2.7The photo s below show four components that provide the energy needed for the energiser of an electric fence. arrange the components in a logical sequence of use. Solar regulator AC inverter

Q3— Section header —

3.1The wind turbine below is used to produce electricity where no electricity is available or to supplement the national electricity network. Briefly describe the function of each of the follow ing wind turbine parts:

3.1.1Propeller blades (1\

3.1.2Main shaft (1\

3.1.3Gearbox (1\

3.1.4Generator (1\

3.2he sun emits huge amounts of sun energy to the earth every day Ninety nine per cent of the sun s energy is lost due to people's limited ability

3.2.1State the TWO types of energy that sun rays consist of and name a method that can be used to utilise each. (4\

3.2.2State TWO factors that determine the efficiency of a solar electric panel. (2\

3.2.3Name the device that is used to change the direct current of solar panel into useful alternating current. (1\ $'$#$'#"$+,,,,,22//13510AGGQQTSSRQWWOHCEHKMOLMMNNKJIHFGHHFDB@<;;>CCCBA?>;<5/ '&%#!!"!!"##$%'&'

3.3A geothe rmal power plant uses the earth' s heat energy to generate electricity. Ide ntify TWO problems that can be associated with geothermal energy. (2\

3.4Plant and animal matter , such as canola, algae and animal fats can be combusted to be used as iofuel. Name THREE disadvantages of bio

3.5Briefly d escribe the terms e thanol and ethano as alternative fuels in the agricultural industry. (4\

Q4— Section header —

4.1The photo below shows a farm worker welding with an arc welding machine. Name THREE safety hazards that you can identify in the picture which are ignored by the worker that can result in injury. (3\

4.2A photo of an oxy acetylene cutting apparatus is shown below.

4.2.1Name the type of metal that the cutting nozzle is manufactured from. (1\

4.2.2Give FOUR hints to ensure high quality welding joints when oxy acetylene welding is done in the overhead welding position. (4\ Oxyacetylene cutting nozzle Ag

4.3welding operator can make certain mistakes when welding with a MIG welding machine. Name the welding defect that could be caused by the following during MIG welding. Write only the defect next to the question number (4.3.1

4.3.4in the ANSWER BOOK. PROBABLE CAUSE DEFECT (4\ Draughty conditions Painted, wet or oily plate Wet or rusty filler wire

4.3.1Preparation too narrow Root gap too small Worn co ntact tip causing irregular arc

4.3.2Inade quate inductance Voltage too low Rusty or prim ed plate

4.3.3Welding s peed too fast Current too high Poor technique

4.4Describe the MIG welding process from the moment the arc is struck until the trigger is released. (5\ Name TWO ga ses that can be used as a shielding gas for the we lding joint area during the MIG welding process.

4.6SCENARIO You have been requested to manufacture a safety gate for the store room on the farm where hazardous materials are stored

4.6.1Prepare a material list of all the material needed nufactur the safety gate. (4\

4.6.2Calculate the total cost of the material used for manufacturing the safety gate. Show ALL calculations. (5\

4.6.3Draw a neat sketch of the safety gate with the parts mentioned in the SCENARIO Marks will be allocated for the following

4.7The gas es in the list below are all used in plasma cutting for the cutting of various types of metals

4.7.3\ in the ANSWER BOOK. air/oxygen hydrogen nitrogen argon APPLICATION GAS (3\ Best quality cut for mild aluminium, s

4.7.1Used t o cut thick steel an d metal and is the ottest gas available

4.7.2with a consistent speed and le ngthens the life of the machine

4.7.3[35] Ag 14 NS35

Q5— Section header —

5.1Study the photo of a power take off shaft below that is used in the drive system of a cutting machine and answer the questions that follow.

5.1.1Name the mechanism indicated by the arrow in the above photo. (1\ .1.2 Give TWO reasons for installing the mechanism indicated by the arrow in the drive system of the cutting machine. (2\

5.1.3Describe TWO procedures to follow when the cutting machine is to be stored for a long period. (2\

5.2The illustr ation below shows two types of round balers. VERMEER WELGER

5.2.1Briefly explain the bale forming mechanism of each baler. (2\

5.2.2Name TWO safety precautions that a labourer must consider when baling is done a slo pe or hillside. (2\

5.3

5.4The hydraulic oil in the transmission system of a tractor needs to be replaced during a service.

5.4.1Where can you find reliable information to choose the correct grade oil for the tractor? (1\

5.4.2Name THREE advantages of the use of automatic transmission oil in tractor hydraulic systems. (3\

5.5Study the illustration below of the three point hydraulic system of a tractor and answer the questions that follow Label parts as shown in the above illustration

5.1Write the names of the farm workshop apparatus below. (3\

5.1All farm implements and tractor spares should comply with certain requirements. Name THREE advantages of standardising farm implements and tractor spares.

5.140

Q6— Section header —

6.1The photos below show different methods of irriga tion. Write down the name of each irrigation method and state ONE advantage of that type of irrigation system. (6\

6.2Describe the steps hat you must foll ow in selecting a suitable p ump for a new irrigation system. (6\

6.3Give TWO reasons why a farmer need to determine the water flow rate of a pipe delivery system. (2\

6.4Recommend TWO preventative measures a farmer must keep in mind to prevent t heft when installing electrical irrigation cables (2\

6.5Indicate h ow computer software can help to effectively regulate irrigation system to ensure a better harvest. (2\

6.6

6.7An irrigation sprayer is shown below.

6.7.1mpuritie s like rust and lime deposits in irrigation pipes an cause blockages in sprayers . How can these impurities be removed

6.7.2Describe the internal construction of the sprinkler head of an irrigation sprayer and explain the reason for the design (3\

6.8Name the drainage method that can be used in each of the following situations

6.8.1Sewerage water from a toil (1\

6.8.2ater from kitchen sink (1\

6.8.3Excess arden water (1\

6.9Briefly d escribe how a septic tank functions. (3\ [30] TOTAL SECTION B: GRAND TOTAL:30

Topics Identified

Plant ProductionAgricultural Management

Mark Allocation

Total200 marks

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

Paper information

SubjectAgricultural Technology

Year2015

SessionNovember

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages19

Downloads5

Examination context

Decade2010s

Years ago11y

SeasonSpring (SH)

Start dayThursday

Exam periodNovember 2015

Days since exam4,007

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Corresponding marking memorandum

Marking memorandum available

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Agricultural Technology Memo 1 (English) →

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