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HVAC
HVAC Excellence Employment Ready Certification
Tool Identification - Essential HVAC Instruments & Equipment
Knowledge Check
Tool Identification - Essential HVAC Instruments & Equipment
Knowledge Check
Knowledge Check
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What is the purpose of flowing dry nitrogen through copper tubing while brazing?
A
To increase the pressure inside the tube for simultaneous leak testing
B
To verify that the tube is free of leaks before brazing
C
To cool the tubing faster and protect the joint from heat
D
To prevent oxidation scale from forming inside the copper tubing
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