3.1 Identify the water trap above - NSC Civil Technology Woodworking - Question 3 - 2017 - Paper 1
Question 3
3.1 Identify the water trap above.
3.1.2 Explain the purpose of a water trap.
3.2 State TWO factors that determine the temperature of the water in a solar heater.
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Worked Solution & Example Answer:3.1 Identify the water trap above - NSC Civil Technology Woodworking - Question 3 - 2017 - Paper 1
Step 1
Identify the water trap above.
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Answer
The water trap shown in Figure 3.1 is an 'S-trap'. It is designed to hold a small amount of water in the bend to create a seal that prevents sewer gases from escaping into the building.
Step 2
Explain the purpose of a water trap.
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Answer
The primary purpose of a water trap is to prevent foul air and gases from the sewage system from entering the building. By maintaining a water seal, it acts as a barrier against unpleasant odors.
Step 3
State TWO factors that determine the temperature of the water in a solar heater.
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Answer
The season or weather conditions can significantly affect the temperature, as solar heaters rely on sunlight.
The orientation and tilt of the solar panel in relation to the sun's position also play a crucial role in the heating efficiency.
Step 4
Name the part in an electric geyser that is used to warm up water.
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Answer
The part used to warm up water in an electric geyser is the heating element.
Step 5
Explain why the cold water inlet is mounted at the bottom of the geyser and the hot water outlet is mounted at the top of the geyser.
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Answer
The cold water inlet is located at the bottom of the geyser to ensure that the incoming cold water does not mix with the hot water already present. This promotes efficient heating as the hot water, which rises, is drawn from the top for use.
Step 6
Name the component that is installed for safety purposes to prevent the geyser from bursting when the water becomes too hot.
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Answer
The safety component is typically a temperature and pressure relief valve (TPR valve) that releases water to prevent excessive pressure buildup within the geyser.
Step 7
Explain the function of the grid.
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Answer
The storm-water grid receives and drains storm water, allowing it to enter the storm water system. It guides water to flow off the roads to prevent flooding and maintains road safety.
Step 8
State ONE consequence if the grid is blocked.
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Answer
If the grid is blocked, storm water may not be able to enter the grid, leading to potential flooding on the roads.
