How many questions is the R-410A exam?

25 multiple
The Exam consists of 25 multiple choice questions. You must get at least 21 correct in order to pass the exam.

What is the mixing ratio of R-410A refrigerant?

R410A refrigerant is a type of mixed (zeotropic) synthetic refrigerant consisting of R32/R125 with the composition (50% / 50%).

Do you need certification to buy 410A?

Are you required to have a license or to be certified to handle and purchase R-410A? You are required to have an EPA Section 608 Type II or Universal certification license to handle R-410A but no license is legally necessary for purchase.

What is R-410A certification?

Because many HFC refrigerants, such as R-410A, operate at considerably higher pressures than many other refrigerants, safety training is imperative. R-410A systems will require service professionals to use different tools and equipment when installing, retrofitting, or repairing these systems.

How is R-410A made?

R-410A is a member of the hydrofluorocarbon (HFC) class of refrigerants and is composed of equal parts R-32 and R-125. Its chemical formula is CH₂F₂ + CHF₂CF₃.

What are normal pressures for R-410A?

System Pressures A normally operating R-410A system with the same condensing temperature of 120 degrees and a 45 degree evaporator saturation temperature will have a high side pressure of 418 psig and a low side pressure of 130 psig.

What are good pressures for 410A?

For R-410A, a working pressure capability of at least 400 psi is recommended (this includes recovery cylinders). Standard DOT recovery cylinders rated for 350 psi should not be used.

Is it illegal to vent R-410A?

You cannot legally vent R410A refrigerant into the atmosphere. Though it does not have high ozone depletion potential, it is a greenhouse gas so it is regulated by the EPA and they say don’t vent it into the atmosphere. If you do, then you have violated the Clean Air Act.

Can you top off a 410A system?

Therefore, for slight leaks, R-410A can be topped off. Just make sure it’s removed from the drum while it is in a liquid state. If you are charging it into the low side of the system, remember that the liquid must be vaporized before it enters the suction line.

What type lubricant should be used with R-410A?

POE OILS. POE oils are a family of synthetic lubricants. Unlike natural mineral oils, POE oils are completely wax-free and are the best choice of lubricants for use with the new generation of chlorine-free HFC refrigerants, such as R-410A.

Can 410A be topped off?