Quiz 1- SANS 94619

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Question 1 of 5

1. Question

Is the following statement True or False:

Soft water is mineral-rich, and when

heated causes calcification in the geyser and solar collector pipes.

a) True
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b) False
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Question 2 of 5

2. Question

How can scaling be reduced in a Solar system?

a) Install a reverse osmosis plant on the inlet water supply line.
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b) Use an indirect solar system for the installation.
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c) Install a water softener on the inlet water supply line.
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d) All of the above
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Question 3 of 5

3. Question

True or false:

As water is not compressible, when it is heated, its density decreases, and its volume increases.

a) True
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b) False
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Question 4 of 5

4. Question

Select the correct statement/s:

Thermosyphon Solar systems work as follows

a) The geyser is placed lower than the panel to assist with the natural convection of the fluid between the panel and the geyser.
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b) No pumps are required.
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c) These systems heat water or an antifreeze fluid, such as glycol.
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d) All of the above
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Question 5 of 5

5. Question

Why is the hot water outlet of the geyser at the top and the cold-water inlet at the bottom?

a) Because of stratification taking place in the geyser the hot water is at the top of the geyser and the cold at the bottom.
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b) The cold-water molecules are less charged and move slower than the hot molecules. This will effectively cause the hot water to be “lighter” and be displaced by the cold water which is” heavier”.
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c) All of the above
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d) None of the above.
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