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



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Watch the video about EVAPORATIVE COOLERS below and complete the following five sentences with NO MORE THAN THREE WORDS.
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1. Water from outside water valve is collected in the ...................
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2. Water is forced through a hose to a …………………. by a recirculating pump.
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3. A purge pump is used to wash away …………… in the water.
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4. The hot and dry outside air is drawn through the …………… by a motor.
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5. The hot air inside the home is forced out through open ……………….
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Watch the third part of the lecture and take careful notes of the content. Then use your notes to answer the questions that follow.

Question 13


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Use your notes to complete the sentence.
The vapor compression refrigeration system consists of a refrigerant, two ……………, a compressor, a metering device, and the tubing.

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Use your notes to complete the sentence.
The tubing …………all components and prevents the refrigerant from leaking out of the system.
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Question 15
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What is the core principle that makes refrigerators work?
Select one:
A. Turning liquids to solids decreases temperature.
B. Evaporating liquids absorb heat. 
C. Raising pressure lowers temperature.
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Which statement is NOT true about refrigerants?
Select one:
A. They have much lower boiling points compared to water.
B. They can absorb heat much faster than water.
C. They present significantly harmful environmental impacts. 
D. They can transform back and forth between liquid and gaseous state.
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Question 17
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Why don't refrigerators use pure ammonia as a refrigerant?
Select one:
A. high boiling point
B. high toxicity 
C. high GWP value
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Question 18
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Choose the correct statement about the capillary tube.
Select one:
A. It’s long and occupies much space in the system.
B. It does not respond to differences in cooling demand. 
C. It’s equipped in high efficiency refrigeration systems.
D. It has a small but adjustable internal diameter.
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Question 19
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Are the following statements true or false?


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