HVAC Journeyman Practice Exam

Disable ads (and more) with a membership for a one time $4.99 payment

Study for the HVAC Journeyman Exam with our comprehensive resources. Get familiar with the exam format through engaging quizzes, flashcards, and multiple-choice questions designed to enhance your knowledge. Prepare effectively and confidently for your HVAC journey!

Practice this question and more.

What material can be used for soldering hydronic copper tube joints?

Lead-based solder
95% tin with 5% antimony solder
Brass solder
Only silver solder

The correct answer is: 95% tin with 5% antimony solder

Using a solder that consists of 95% tin and 5% antimony is appropriate for soldering hydronic copper tube joints because it creates a strong, effective bond that is suitable for the temperatures and pressures typically encountered in hydronic systems. This type of solder has good wetting characteristics and does not introduce harmful lead into the system, making it safer and more reliable for use in plumbing applications. Lead-based solder is not suitable for hydronic systems due to the health risks associated with lead. Regulations have moved towards eliminating the use of lead in plumbing to protect public health. Additionally, while brass solder is used for different applications, it is not typically specified for soldering copper pipes in hydronic systems, as the composition may not blend well with copper without potential corrosion issues. Silver solder, while effective for some specific applications, may be unnecessary for standard hydronic installations and can be more expensive than lead-free solders. Therefore, the 95% tin and 5% antimony composition is favored for its balance of performance, safety, and compliance with modern plumbing standards.