Agricultural Technology English

November 2012 — Grade 12 / Matric — Agricultural Technology

Past Paper 2012 Grade 12 English

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🎯 200 marks ⏱️ 3h 📄 13 pages 📝 84 items found 📚 3 topics

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1.2This question paper consists of TWO sections, namely SECTION A and SECTION B. BOTH sections are COMPULSORY SECTION A: MULTIPLE CHOICE QUESTIONS

2.3Answer the questions in this section on the attached ANSWER SHEET. Follow the instructions when answering the multip choice uestions. Place the COMPLETED ANSWER SHEET in the ANSWER BOOK. SECTION B: STRUCTURED QUESTIONS

3.5This section consists of FIVE questions. Answer the questions in this section in the ANSWER BOOK Number the answers correctly according to the numbering system used in this question paper. Start EACH question on a NEW page.

Q1— Section header —

1.20\ on the attached ANSWER SHEET. EXAMPLE:

1.1Pesticide spra ying equipment use substances and must be u sed with extreme care and under supervision.

1.2as a result of exposure to the noise of equipment is a state of health that

1.3

1.4

1.5The i ncorrect use and disposal of agricultural chemicals can cause res piratory diseases and injuries can

1.6Stainless steel can be produce melt ing chrome, manganese and .. together mild steel ickel opper

1.7

1.8Mild steel sheets are often galvanised to pr event them from getting too hot usting getting too cold

1.9is a plastic that is extremely heat resistant. Bakelite Perspex Teflon (2\

1.10

1.11

1.12

1.13

1.14

1.15

1.16

1.17To prevent the driver of a tractor from inhal ing exhaust gases the manifold of the tractor may

1.18

1.19

1.20Which ONE of the following is NOT an advantage of a combine harvesting machine? It is a time and labour

Q2— Section header —

2.6Give a valid reason for each of the following statements

2.6.1Clear fibre glass roof plates are used on the roof of a greenhouse. (1\

2.6.2An effective game farm fence must be 2 4 met es high (1\

2.6.3The wires in a fence must not be tensioned too much on a hot day. (1\

2.6.4The best shape that can be used for the construction of tunnels is a half round shape (1\

2.6.5Exposed water pipes tend to freeze during winter are therefore insulated. (1\

2.7State FOUR uses of galvanised steel sheets. (4\

2.8Name TWO methods cur concrete. (2\ [35]35

Q3— Section header —

3.1Choose word from OLUM that matches the description in C OLUMN

3.1.5for example

3.1.6Petroleum COLUMN A COLUMN B

3.1.5An alcohol biofuel used in racing cars Gas from earth gas or landfills Fermenting and then distilling starch and sugar crops Made from crude oil Transester

3.2Electricity in any form is very dangerous. To reduce the risk of a fatal electrical shock one has to be very careful and must adhere to all safety regulations that are applicable electrical equipment.

3.3Explain the process of effectively transforming wind energy into a form of electrical power. (6\ Briefly escribe

3.5State THREE advantages of bio fuel. (3\ [20]20

Q4— Section header —

4.1.1Identify parts to (5\

4.1.2hat does the abbreviation MIG stand for (3\

4.1State FIVE advantages of MI G welding (5\

4.2The picture below shows an inverter welder that is used on a farm for general welding purposes.

4.2.1Name the type of current produced by the welding machine above (1\

4.2.2Give FIVE rea sons why a farmer should consider buying an inverter welder. (5\

4.2.3Is it possible to weld alumin with the inverter welder? Motivate your answer. (2\

4.3Make neat label sketch of the forehand welding technique when welding with oxy acetylene welding apparatus. Marks will be a warded

4.4escribe the term shrinking of welding join

4.5Explain the process of hard facing of wo rn metal parts. (2\ [35]35

Q5— Section header —

5.1The picture below shows a power take off (PTO\ shaft that is used as a drive link between the tractor and the implement.

5.1.1Name the device that enables the power take off shaft o operate at an angle. (1\

5.1.2State the fun ction of the grease nipple installed on this device. (1\

5.1.3The power take off shaft must always be screened off to prevent it from injuri people.

5.3Gearboxes are used in vehicles to make it possible to select the correct gear ratio for the job that must be done.

5.3.1Name THREE different types of gearboxes that can be used n a vehicle. (3\

5.3.2

5.4farmer wants to pump water from a river with an electrical motor and a centr ifugal pump. The diameter of the pulley on the motor is 200 mm and the /min is 1 500 The speed of the centrifugal pump, as indicated on the

5.4.1Calculate the diameter of the pulley on the pum p for optimal efficiency Use the following formula: Na Da = Ng Show ALL calculations. (3\

5.4.2The drive between the motor and the pump in the sketch above is brought about by V belts. Describe TWO advantages of V belts. (2\

5.4.3Give a reason for crossing the belt a s indicated in the above sketch. (1\

5.5Buying a new tractor is a very costly undertaking for a farmer.

5.5.1Name FIVE factors that need to be considered before buying a new tractor. (5\

5.5.2Name FOUR factors that need to be considered in terms of drive/torque when tractors are purchased. (4\

5.6The picture below shows a bal that is used to make round bales on a farm.

5.6.1Name he TWO diff erent baling systems found in round balers. (2\

5.6.240

Q6— Section header —

6.1Drainage of soil with a low infiltration tempo s of the utmost importance to a crop farmer. flooded /water logged field

6.1.1Name THREE disadvantages of closed drains. (3\

6.1.2Briefly discuss the construction of a closed drain (5\

6.2Irrigation pipes are sometimes buried ath the soil. Describe HREE precautionary measures that should be take when these pipes are laid.

6.3septic tank serves as a reservoir where solids accumulate and are gradually broken down by bacterial action.

6.3riefly xplain a septic tank functions (3\

6.3Identify the places where a septic tank should NOT buil (4\

6.3Maintenance of a septic tank is very important. Give reasons for this statement (3\

6.3Name FIVE important measures which users o f septic tank systems must keep in mind if they want the system to function properly (5\

6.4Water scheduling is the process used by irrigation system managers to determine the correct frequency duration of watering and the quantity of water lied to crops Give TWO reasons why irrigation scheduling is

6.5What is the maximum depth of a well ? Motivate your answer. (2\ [30] TOTAL SECTION B: GRAND TOTAL: #&.682+'* 4@KC3 +30

Q1— Section header —

Topics Identified

Plant ProductionAgricultural ManagementSoil Science

Mark Allocation

Total200 marks

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

Paper information

SubjectAgricultural Technology

Year2012

SessionNovember

TypePast Paper

PaperSee title

LanguageEnglish

Pages13

Downloads5

Examination context

Decade2010s

Years ago14y

SeasonSpring (SH)

Start dayMonday

Exam periodNovember 2012

Days since exam5,104

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