3.1.1 Name TWO instances where a small wind turbine can be useful on a farm - NSC Agricultural Technology - Question 3 - 2024 - Paper 1
Question 3
3.1.1 Name TWO instances where a small wind turbine can be useful on a farm.
3.1.2 State TWO disadvantages of wind turbines.
3.1.3 Describe the importance of a lar... show full transcript
Worked Solution & Example Answer:3.1.1 Name TWO instances where a small wind turbine can be useful on a farm - NSC Agricultural Technology - Question 3 - 2024 - Paper 1
Step 1
3.1.1 Name TWO instances where a small wind turbine can be useful on a farm.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Electrical water pump.
Small home/caravan/boat.
Step 2
3.1.2 State TWO disadvantages of wind turbines.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Insufficient wind in the area.
High initial cost.
Step 3
3.1.3 Describe the importance of a larger blade area of a wind turbine in relation to the generation of electrical energy.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The larger the wing area of the blades, the more wind energy is harnessed to rotate the turbine. This increase in surface area allows for greater energy capture and conversion to electrical power, making the turbine more efficient.
Step 4
3.1.4 Name the device installed in the head of the wind turbine to decrease torque and increase input shaft speed to the generator.
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Gearbox.
Step 5
3.2.1 Identify the type of alternative energy system in the picture above.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Photovoltaic/Solar energy.
Step 6
3.2.2 Name a suitable material for the coating on the panels and state ONE property of this coating.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
3.2.3 Batteries can be recharged using the system above. What can be installed in the system to prevent overcharging of the batteries?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Regulator/Charge controller.
Step 8
3.3 Study the table below and rearrange the working principles of a geothermal power station in the correct sequence.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Cold water is pumped into the borehole.
Underground heat source heats up the water.
Steam is transferred to a turbine & generator unit.
Generator electrical energy is sent to the national grid.
A condenser cools the steam and water is formed.
Step 9
3.4 Describe the term biofuel and give ONE example of such a fuel.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Biofuel is defined as fuel derived from biological materials, such as plants or animal matter, that can be combusted and used as fuel. An example of biofuel is methanol.
