NSC Agricultural Technology Basic calculations: 1.1 Various options are provided

Question

1.1 Various 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 1.1.1 D.

1.1.1 The best type of isolation material that is used to isolate an electric fence line from the supporting posts is …
A. copper.
B. aluminum.
C. ceramic.
D. steel.

1.1.2 There is a constant change in the angle between the welding rod and the work piece during this welding process:
A. Pipe welding
B. Overhead welding
C. Vertical welding
D. Horizontal welding

1.1.3 The gas that must be removed when doing metal inert-gas (MIG) welding because it makes welding difficult:
A. Helium
B. Oxygen
C. Argon
D. Shielding gas

1.1.4 Timing of the ram baler means the …
A. exact moment when the needles lift the binding rope so that the compressed hay can be bound.
B. number of bales that are produced by the baler.
C. rotational speed of the power take-off shaft (PTO) in relation to the ground speed of the baler.
D. protection of the auger when overloading occurs.

1.1.5 The main function of the shear bolt is to act as a … mechanism.
A. slip
B. safety
C. drive
D. cutting

1.1.6 The three-point mechanism was designed by …
A. John Deere.
B. Henry Ford.
C. Alva Laval.
D. Harry Ferguson.

1.1.7 Black smoke from the exhaust of a tractor indicates …
A. a too rich diesel mixture.
B. a water leak into the combustion chamber.
C. worn piston rings.
D. that the engine uses oil.

1.1.8 Stainless steel is a combination of the following metals:
A. Steel, aluminium, zinc and nickel
B. Steel, copper, tin and lead
C. Steel, chromium, magnesium and nickel
D. Steel, silver, brass and lead

1.1.9 The synthetic material with the best heat resistance ability:
A. Bakelite
B. Perspex
C. Rubber
D. Nylon

1.1.10 Vibration in the hammer mill can be reduced by …
A. applying the handbrake on the tractor.
B. catching the hammer mill properly.
C. using V-belts to drive the hammer mill.
D. using new sleeves on the hammer mill.

1.2 Change the UNDERLINED word in each of the following statements to make the statements TRUE. Write only the word next to the question number (1.2.1–1.2.5) in the ANSWER BOOK.

1.2.1 Cast iron must be … to prevent cracking of the joint after welding.
1.2.2 Deep holes are drilled into the earth until a … source for harnessing geothermal energy is found.
1.2.3 The … converts direct current into alternating current.
1.2.4 Implements, equipment and machinery are examples of … capital.
1.2.5 A bearing is a machine component that … friction between the moving component and the shaft.

1.3 Choose a word/term from COLUMN B that matches the description in COLUMN A. Write down only the letter (A–H) next to the question number (1.3.1–1.3.5) in the ANSWER BOOK.

1.3.1 A drive system that draws tighter round the pulley when the tension on it increases
1.3.2 The drive method that has the ability to drive a machine over a long distance
1.3.3 The pneumatic tool that is used in a workshop to fasten nuts and bolts
1.3.4 The device with the ability to control the fertiliser application rate on a planter
1.3.5 The source from which the central controller of a centre-pivot irrigation system receives A.

1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2017 - Paper 1

Worked Solution & Example Answer:1.1 Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2017 - Paper 1

1.1.1 The best type of isolation material that is used to isolate an electric fence line from the supporting posts is …

1.1.2 There is a constant change in the angle between the welding rod and the work piece during this welding process:

1.1.3 The gas that must be removed when doing metal inert-gas (MIG) welding because it makes welding difficult:

1.1.4 Timing of the ram baler means the …

1.1.5 The main function of the shear bolt is to act as a … mechanism.

1.1.6 The three-point mechanism was designed by …

1.1.7 Black smoke from the exhaust of a tractor indicates …

1.1.8 Stainless steel is a combination of the following metals:

1.1.9 The synthetic material with the best heat resistance ability:

1.1.10 Vibration in the hammer mill can be reduced by …

1.2.1 Cast iron must be … to prevent cracking of the joint after welding.

1.2.2 Deep holes are drilled into the earth until a … source for harnessing geothermal energy is found.

1.2.3 The … converts direct current into alternating current.

1.2.4 Implements, equipment and machinery are examples of … capital.

1.2.5 A bearing is a machine component that … friction between the moving component and the shaft.

1.3.1 A drive system that draws tighter round the pulley when the tension on it increases

1.3.2 The drive method that has the ability to drive a machine over a long distance

1.3.3 The pneumatic tool that is used in a workshop to fasten nuts and bolts

1.3.4 The device with the ability to control the fertiliser application rate on a planter

1.3.5 The source from which the central controller of a centre-pivot irrigation system receives A.

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