1 Correct Mark 75 out of 75 Flag question Question text Are the following statements true or false?



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Question 1
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Are the following statements true or false?

True

False














There is a clear distinction between natural and artificial refrigeration.











Air conditioning not only includes temperature control but also make sure the air is clean and well circulated within the system.











Refrigeration aims to create cool air in a given space.







Question 2
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Use your notes to complete the sentence.
Two key principles presented in the video are the first law of thermodynamics and the principle of ……………..
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Question 3
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Use your notes to complete the sentence.
Refrigeration or air conditioning works against the……………., i.e. moving heat from lower to higher temperature area.
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Question 4
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Use your notes to complete the sentence.
……………., which is a natural cooling system, refers to the use of ice produced at night.

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Question 5
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Which statement is TRUE about William Cullen?
Select one:
A. His invention is still in use today.
B. He was born in the 1740s.
C. He rewrote the history of artificial refrigeration.
D. He is the father of artificial refrigeration. 
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Watch the second part of the lecture and take careful notes of the content. Then use your notes to answer the questions that follow.
Question 6
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Which of the following is the key component in a natural evaporative cooling system?
Select one:
A. Air inlet
B. Thick walls
C. Shaded enclosure
D. Wet rags 
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Question 7
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Which statement is TRUE about a modern evaporative cooling system?
Select one:
A. Such a system saves 25% of electricity bill compared to central air conditioners.
B. The outcoming air is cooler and much drier than the outside air.
C. Installation of such a system is more expensive than other refrigeration systems.
D. Constantly moistened cooling pads are used instead of porous water pots. 
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