How much oil is lost during recovery? - ✔✔ Very little if any
What's an issue with flushing an AC system? - ✔✔ It dosnt remove all debris
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Is Topping Off a charge in a car allowed? - ✔✔ Yes
Hold time after a system recovery? - ✔✔ 5mins
What will happen to oil in a R134a system if left open? - ✔✔ Sucks moisture from air
Safety info about refrigerant is kept where? - ✔✔ MSDS Sheet
What is the purpose of service caps? - ✔✔ They're the primary seal
What is the result of R134a leaking into the atmosphere? - ✔✔ It gets trapped in the troposphere
Is 1234yf flammable? - ✔✔ Yes only a little
What must be done after purchasing a new recovery machine? - ✔✔ Register it with the EPA
Why would excess oil come out during recovery? - ✔✔ System probably had an oil overcharge
What is the DOT# for recovery tanks? - ✔✔ 4BA or 4bW
What system requires extra attention during recovery? - ✔✔ 1234yf
What is the standard for SAE J2791? - ✔✔ Leak detector that picks up 4 grams or less a year
What ust be done with recovered refrigerant? - ✔✔ The air must be taken out completely
If the mechanic's gauges rise from a vacuum to pressure, what is required? - ✔✔ Additional recovery
What is the only way to fully clear moisture from the A/C system? - ✔✔ Replacing the desiccant
Pressure ______ the boiling point - ✔✔ Raises
Vacuum _______ the boiling point - ✔✔ Lowers
What should you do when replacing hoses? - ✔✔ Make sure you have the correct type/size of tubing
What does GWP stand for? - ✔✔ Global Warming Potential
CO2 is equal to what A/C system? - ✔✔ R-744
HFO-1234yf systems are acceptable in what kinds of vehicles? - ✔✔ Passenger cars, light-duty trucks, medium-duty passenger vehicles, heavy-duty pickup trucks, and complete heavy-duty vans
HFO-1234yf systems are not acceptable in what kinds of vehicles? - ✔✔ Heavy-duty trucks, refrigerated transport, and off-road vehicles such as farm equipment
HFO-1234yf is classified by ASHRAE as what? - ✔✔ A2L- mildly flammable
R-744 systems operate at ___ to ___ times higher than HFC-134a and HFC-152a systems. - ✔✔ 5 to 10
HFC-152a is ___ - ✔✔ flammable
What are the 2 types of HFC-152a systems? - ✔✔ Direct expansion and secondary loop type
Direct Expansion - ✔✔ Refrigerant directly expands within the evaporator that is located inside the passenger compartment
Secondary Loop (Open Loop) - ✔✔ A circulating non-flammable fluid replaces the evaporator which provides isolation between the flammable refrigerant and the passenger compartment
Section 609 of the Clean Air Act gives the EPA authority to do what? - ✔✔ Establish standards and requirements regarding the servicing of mobile A/C systems
What/who establishes standards specifically for the service of motor vehicle air conditioning systems (MVAC's)? - ✔✔ Section 609 of the Clean Air Act
How many categories of the Section 608 Certification are there? - ✔✔ 4 types
What are the 4 categories of Section 608 of the Clean Air Act? - ✔✔ 1.) Small Appliances, 2.) High Pressure Appliances, 3.) Low Pressure Appliances, and 4.) All Appliances except MVACs
What type of Section 608 is Section 609 similar too? - ✔✔ Type 2
Busses and other vehicles using HCFC-22 are not considered MVACs. What are the classified as? - ✔✔ High Pressure Vehicles under Section 608 type 2
DIY jobs are not required to be certified, but what are they required to use? - ✔✔ Proper equipment
Who is the owner of recovery/recycling equipment required to inform? - ✔✔ The EPA
Who is responsible for keeping the certification on file? - ✔✔ The shop owner
How long should records be kept? - ✔✔ 3 years
Before it can be reused, what should the happen to the refrigerant? - ✔✔ It needs to be recycled through the use of a recovery/recycling machine [Show Less]