Agricultural Technology Paper 1 (english)

Feb-March 2015 — Grade 12 / Matric — Agricultural Technology

Past Paper 2015 Grade 12 English

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🎯 200 marks ⏱️ 3h 📄 16 pages 📝 124 items found 📚 4 topics

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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.

1.5Non programmable calculators may be used. Write 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 que stions.

3.2Start EACH question on a NEW page.

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 nu mber (1.1.1

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

1.1.1he adhes ive that will be best suited for repairing a water tank made of glass used for fish farming Epoxy Silicon Resorcinol Latex (2\

1.1.2The factor that does NOT contribute to tractor oll overs when carrying out tasks on the farm ornering at high speeds

1.1.3ONE of the following has no influence on the depth control system of a tractor Incr eased wheel base of the tractor

1.1.4ynthetic aterial such as is best known for its heat resistan proper ties. Perspex resti akelite

1.1.5The prescribed size for warning sign on a electric fence at least ...

1.1.6... can NOT be used as a pipe welding position Horizontal fixed position Vertical position

1.1.7... /are NOT part of the three point mechanism of the tractor lifting arms top link ower ake

1.1.8aulty drum speed o the combine harvester causes ernels to be blown out by the blower of the machine. kernels of different sizes to be collected in the collecting bin. belts to be thrown from the pulleys.

1.1.9To adjust the cross angle of implement in relation to the tractor s forward m ovement you will use evelling box. op link

1.1.10Bronze can easily be joined by welding. MIG welding. soldering. TIG welding (2\

1.2Change the UN DERLINED 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

1.2.1Acetylene gas is used with CO in MIG welding. (2\

1.2.2(n\ gas flame melts the metal when cutting with plasma cutter. (2\

1.2.3The pro cess where water is sen through different liquids that are separated by a permeable film which allows water to pass through on

1.2.4Teflon protects the metal parts of the irrigation system against corrosion. (2\

1.2.5GPS is a modern technological device that can be used to start or stop an irrigation system over long distances. (2\

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

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

1.3.1Elements used in the manufacturing of brass compon ents ingle action lass A evaporation pan hannel drain French drain eutron probe ouble action

1.3.2The device used by crop farmers to measure soil water content

1.3.3The instrument used to determ ine evapotranspiration in a specific field

1.3.4Long, narrow concrete drains used to move large amounts of water

1.3.5A hydraulic cylinder installed in the steering mechanism of a back act (5 x 2\ (10\ TOTAL SECTION A:

Q2— Section header —

2.1Give TWO reasons why each of the following alloy metals is used to manufacture the product

2.1.1Stainless steel in the manufacturing of milk tank (2\

2.1.2pper in the manufacturing of electrical conductors (2\

2.1.3Brass in the manufacturing pipe fittings (2\

2.2Name the alloy element commonly used with tin to form soft solder. (1\

2.3Name FIVE conditions under which an adhesive could be used that should be take consideration when an adhesive is bought

2.4Give FIVE reasons why farmers would prefer fibre glass water drinking troughs

2.5Teflon coated products such as cooking equipment are well known in t industry. Describe FIVE

2.6The charger ( energis er\ in the photo below provides the energy needed for the electric fence to work effectively

2.6.1Name TWO me thods that can be implemented to prev lightning strikes from damaging the

2.6.2Indicate the minimum distance that the earth wire/spike of the above energis er must be away from any other electrical system.

2.6.3Name , apart from lightning, THREE elements of nat ure that extremely harmf ul electric

2.6.4Sand, very dry soil or dry plant material can c ause an inefficient arth connection. Describe TWO ways of increasing the earth ing efficiency

2.6.5Name FIVE requi rements that should be met by warning plates that are attached to electric fence (5\ [35]35

Q3— Section header —

3.1Wind power convert kinetic energy present in the wind, into m echanical energy and then into electrical energy.

3.1.1How can the energy produced from this device be stored efficiently for use during windless d ays? (1\

3.1.2Describe THREE disadvantages of wind energy t hat will influence your choice when ch oosing an alternative energy source (3\

3.2The ea th contains a considerable untapped energy source in the form of heat.

3.2.1Name the heat energy that is extracted from the earth s inner core (1\

3.2.2Describe TWO important issues that an be raised during the initial survey phase before

3.3Bio fuel is any plant or animal matter which is combustible and can be used as a fuel for engines on a farm

3.3.1Give THREE advantages of b fuel. (3\

3.3.2Name TWO common alternative fuels that are obtained from plant origin. (2\

3.4The s olar panels shown below are used to generate electricity through solar (sun\ energy. Explain the

3.5Discuss FOUR disadvantages of solar energy. (4\ [20] ,& """"""""'20

Q4— Section header —

4.1The photo graph below shows the tip of the nozz le of a MIG welder.

4.1.1A farm worker was repairing an implement with the aid of a MIG welding machine uddenly the wire fuse itself to the welding tip Give

4.1.2Name TWO methods used to solve problem mentioned in UESTION

4.1.1(2\

4.1.3Give TWO reasons for the occurrence of welding spatter when using the MIG welding

4.1.4Describe TWO measures that can be appl ied solve the problem of weld ing

4.2Welding galvanized steel is very dangerous. Give TWO reason to support this statement. (2\

4.3Describe the correct process overhead arc welding (4\

4.4Name THREE hazards to take into consideration when working with the plasma cutter. (3\ *+ -//,*.0257;<>;:63/+ *054.

4.5Read the scenario below and answer the questions that follow. You are the manager of a dairy farm . You are experienc ing problems with the water trough as

4.5Make a freehand sketch of the top of your design to protect the ball valve mechanism. (3\

4.5Indicate TWO essential measurements on the sketch (2\

4.5Indicate TWO types of welding joints that can be used. (2\

4.5Supply a cut ting list of the material that you will need. (3\

4.5Name a method that can be used to prevent the metal gri from rusting. (1\

4.6photo graph of xyacetylene cutting nozzle is shown below Answer the questions that follow

4.6.1Nam e TWO types of metals that can be cut by using an oxyacetylene cutting torch. (2\

4.6.2Explain the o cetylene cutting process from the moment the flame has been lit up to the moment that the cut is finished. (5\ [35]35

Q5— Section header —

5.1The following questions are based on the standardi ation of farm implements.

5.1.1Give the main aim of the standardi ation of farm implements (1\

5.1.2Give THREE advantages of farm implement standardi ation. (3\

5.2The sketch below shows ower ake ff (PTO\ shaft that can be used between a tractor and implements to

5.2.1Name the component in the above pic ture that allows the drive shaft to be used at different operating angles

5.2.2Explain the purpose of a bearing. (2\

5.3The sketch below shows a differential with a final drive assembly as found in a bulldozer

5.3.1ame T functions of a differential.

5.3.2State the function of a differential lock. (1\

5.3.3Give the main function of the final drive in the sketch above as indicated by arrow

5.4The drive between the engine and t he differential needs to be disengaged when gears are changed. This is done with the aid of a clutch. Describe THREE properties of a good clutch. (3\

5.5The sketch below shows two pulleys connected with a belt as found in the drive system of a ammer mill.

5.5.1Calculate the diameter of the driven pulley by using the following formula: Na Da = Ng Dg

5.5.2ndicate the direction in which the driven pulley rotates. (1\

5.5.3Explain THREE safety recautions to consider when attaching the hammer mill to the PTO shaft of the tractor. (3\

5.6Farm mach ines use several V belts in their operation systems.

5.6.1Name THREE advantages of using belts instead of flat belts. (3\

5.6.2elts must always be covered by a screen to safeguard people from injury. State THREE requirements the scree

5.7Refer to the sketch below and answer the questions that follow

5.7.1Identify component (1\

5.7.2Identify component explain its function (2\

5.8Sketch shows a shear bolt and sketch a sli p clutch. Both are safety devic used on a

5.8.1Which ONE of the safety device or will allow the tractor driver to proceed immediately with a task after

5.8.2State THREE functions of the slip clutch found n the driv e mechanism of a baling machine. 14

5.9he picture below shows a rot vator used on a farm. Describe the procedure that should be fo llowed

Q6— Section header —

6.1Describe the basic procedure that must be followed when selecting a pump for new irrigation system

6.2Give a reason for dividing a garden irrigation system into different zones. (1\

6.3The picture below shows a spray nozzle which is normally fitted to an overhead irrigation system. Name the spray nozzle indicated in the p icture. (1\

6.4What is the function of an rrigation alve (1\

6.5Discuss THREE factors to consider when purchasing an irrigation sprinkler system

6.6The success of sprinkler irrigation depends on how well it functions. Explain t he working of a irrigation sprin kler (3\

6.7Name TWO criteria that will influence the f armer decision on

6.8he sprinkler head of a fire suppression sprinkler system is attached to the ceiling with the top of the head facing down. Explain the working

6.9A schematic illustration of a septic tank is shown below Answer the questions that follow.

6.9.1ical household sewage treatment system should consist of two compartments riefly explain

6.9.2Name THREE criteria that must be followed when maintaining a septic tank

6.10Name THREE places w here a s eptic tank may NOT be buil (3\

6.11Precision farming is a integration of sever al technologie s that are essential for modern farm ing practices. The mos

6.11.1What does the abbreviation GPS tand for? (1\

6.11.2How can farmer use a GPS device (1\ [30] TOTAL SECTION B: GRAND TOTAL:30

Topics Identified

Plant ProductionAnimal ProductionAgricultural ManagementSoil Science

Mark Allocation

Total200 marks

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

Paper information

SubjectAgricultural Technology

Year2015

SessionFeb-March

TypePast Paper

PaperPaper 1

LanguageEnglish

Pages16

Downloads11

Examination context

Decade2010s

Years ago11y

Season—

Start day—

Exam period—

Days since exam—

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Corresponding marking memorandum

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