Which refrigerant used in residential air conditioning has operating pressures that are about 40% to 70% higher than that of R-22?
A. R-22
B. R-410A
C. R-134a
D. R-12
Answer: B
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Answer the following statement true (T) or false (F)
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a. carbon monoxide c. methane b. neon d. nitrogen
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The flame in a gas fired furnace is burning with heavy yellow tips. What is the problem?
What will be an ideal response?
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There are how many yards in 12 miles?
What will be an ideal response?
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