Who can legally refill a DOT 39 non-refillable cylinder?
A) Only the refrigerant manufacturer B) Only certified technicians
C) Nobody D) Only the cylinder manufacturer
C
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How was Sir William Grove’s device constructed?
What will be an ideal response?
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High temperature refrigeration is that produced by ____.
A. heat from a furnace B. an air-conditioning system C. the vegetable cooling system of a refrigerator D. the freezer section of a refrigerator
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Because of the nature of maintenance, cost analysis often cannot illustrate different profit potentials for individual jobs
Indicate whether the statement is true or false
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Photosynthesis takes place only during the late evening
Indicate whether the statement is true or false
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