Why is nitrogen brazing particularly important when working with systems that use HFC refrigerants?
What will be an ideal response?
POE and HFCs are very strong solvents and "clean" the oxides off of the inside of the copper lines. The oxides then end up in the compressor oil and in metering devices, causing major system failures.
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For most soils, plowing and harrowing every year improves soil tilth in the long run
Indicate whether the statement is true or false
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Most rigid refrigerant lines are made of _______
A) Titanium B) Aluminum C) Copper D) Steel
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A ________ is an electronic device used to convert an ac voltage into a dc voltage
A) Schmitt trigger B) pull-up resistor C) rectifier D) photo transistor
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In a digital system, three or four numbering systems may be in use at the same time
Indicate whether the statement is true or false
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