How do variable refrigerant flow (VRF) systems modulate the volume of refrigerant that is pumped through the system?
What will be an ideal response?
They do it by changing the speed at which the system compressor or compressors operate by means of inverter-controlled compressor motors.
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Passive solar devices are primarily used to heat water
Indicate whether the statement is true or false.
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What types of appliances may oil furnaces be common vented with?
What will be an ideal response?
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Refrigeration refers to space temperatures:
A) Below 60°F. B) Below 32°F. C) Below 40°F. D) Below 0°F.
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At a sale, a garage owner spends $894.94 for a number of different size tires. The freight charges are $54.80. The tires are sold so that a profit of 33 1/3% is made. How much must the tires be sold for? Round to the nearest cent.
A. $1,176.82 B. $1,199.43 C. $1,244.23 D. $1,266.32
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