NSC Agricultural Technology Metal alloys: Various options are provided as

Question

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 numbers (1.1.1 to 1.1.10 in the ANSWER BOOK, e.g. 1.1.1 D).

1.1.1 The amperage of an electric fence may never be higher than … amperes.
A 0,2
B 20
C 0,005
D 0,002

1.1.2 When working with fibreglass, the hardening agent is called the …
A catalyst.
B resin.
C glue.
D epoxy.

1.1.3 Identify ONE of the following qualities that best suits the transmission oil used in a tractor's hydraulic system:
A Volatile
B Compressible
C Expensive
D Remains liquid over a large temperature range

1.1.4 The teeth of this type of gear are angled in both directions and cannot be meshed from the side:
A Spur gear
B Helical gear
C Double helical gear
D Idler gear

1.1.5 Name ONE disadvantage of V-belts:
A Easily slips off pulleys
B Easily joined
C Much more dangerous than flat belts
D Subject to stretching

1.1.6 A … indicates the gas pressure in the cylinders of an oxyacetylene set:
A release valve
B calibrated glass tube with a metal ball inside
C content gauge
D flash-back indicator

1.1.7 ... is NOT one of the functions of the GPS in a modern combine harvester.
A Yield monitoring
B Autonomous steering
C Detection of mechanical problems
D Determining the position of the combine harvester

1.1.8 A photovoltaic panel utilises the … in the rays of the sun to generate electrical energy.
A photons
B X-rays
C ultraviolet rays
D heat

1.1.9 An example of fixed expenses on a tractor:
A Fuel
B Labour
C Depreciation
D Repair

1.1.10 A solar geyser system concentrates the heat from the sun on the … to heat up water.
A glass tubes
B lithium cells
C plasma filament
D photon surface

(10 x 2)

1.2 Change the underlined word(s) in the following to make the statements TRUE. Write only the appropriate word(s) next to the question numbers (1.2.1 to 1.2.5) in the ANSWER BOOK, e.g. 1.2.6 Tractor.

1.2.1 Bronze is a metal alloy made from copper and cast iron.

1.2.2 The tyres of a tractor can be inflated with helium to positively change the mass displacement of a tractor.

1.2.3 During overhead gas welding, the force of the arc helps to keep the molten metal in position.

1.2.4 The melting point of Vesconite is 327 °C and it is used as a coating in cooking pans.

1.2.5 Chromium is used as an alloy element in stainless steel and it helps to give steel a fair amount of toughness at low temperatures.

(5 x 2)

1.3 Choose a word/term from COLUMN B that matches a description in COLUMN A. Write only the letter (A–L) next to the question numbers (1.3.1 to 1.3.5) in the ANSWER BOOK, e.g. 1.3.6 J.

1.3.1 Capital used to pay contractors for work and repairs done on a farm

1.3.2 Type of capital used to improve krals on a farm and to sink boreholes

1.3.3 Used to determine areas of underground water in a maize field

1.3.4 Is used to lock both wheels of the tractor together as one

1.3.5 Water is delivered directly to the roots of plants.

Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2024 - Paper 1

Worked Solution & Example Answer:Various options are provided as possible answers to the following questions - NSC Agricultural Technology - Question 1 - 2024 - Paper 1

1.1.1 The amperage of an electric fence may never be higher than … amperes.

1.1.2 When working with fibreglass, the hardening agent is called the …

1.1.3 Identify ONE of the following qualities that best suits the transmission oil used in a tractor's hydraulic system:

1.1.4 The teeth of this type of gear are angled in both directions and cannot be meshed from the side:

1.1.5 Name ONE disadvantage of V-belts:

1.1.6 A … indicates the gas pressure in the cylinders of an oxyacetylene set:

1.1.7 ... is NOT one of the functions of the GPS in a modern combine harvester.

1.1.8 A photovoltaic panel utilises the … in the rays of the sun to generate electrical energy.

1.1.9 An example of fixed expenses on a tractor:

1.1.10 A solar geyser system concentrates the heat from the sun on the … to heat up water.

1.2.1 Bronze is a metal alloy made from copper and …

1.2.2 The tyres of a tractor can be inflated with … to positively change the mass displacement of a tractor.

1.2.3 During overhead gas welding, the force of the … helps to keep the molten metal in position.