Cobra Kai
What transporting flammable refrigerants, what does DOT require?
what is an appropriate fire extinguisher, a written inventory of gases being transported and a form of security to prevent theft or unauthorized access.
What is the effect of Chlorine?
What is chlorine atoms destroy upto 100,000 ozone molecules and can last in the stratosphere for upto 120 years
What is Ashrae 34?
It is used to classify a refrigerant according to the potential hazards involved with its use.
To move refrigerant in any condition from a system and store it
What is recovery
What is a hydrocarbon (Refrigerants)
The compressor creates a pressure difference in the __________ circuit?
What can be used as a last resort to find a leak while leak detecting?
What is adding trace gas
A system should be pulled down to a vacuum of ____ microns?
What is minimum of 500 microns
What is the ________ refrigerant blend that is a mixture of two or more refrigerants that can seperate, or fractionate , into its original components?
What is a Zeotropic refrigerant blend
Is R-22 considered a lower or higher toxicity (GWP) refrigerant
Lower Toxicity
What is the best leak testing instrument?
What is a ultrasonic leak detector (Soap bubbles acceptable as a 2nd response)
What PSIG is equal to 760,000 microns?
What is 0 PSIG?
What should cylinders be stored upright?
What is pressure relief device is in contact with other vapor cylinders in the same space
A zeotropic or azeotropic is a mixture that can be seperated
What is Zeotropic
On your PT chart, what is the temperature for a R-410 system with a PSIG of 217?
What is 75 degrees fahrenheit
What is a single compound refrigerant that has a GWP of 675?
What is a R-32 refrigerant
What is the required level of evacuation during recovery for Type II appliances for a medium pressure appliance?
What is 10" Hg
What organization sets the standards for PPE manufacturers?
What is OSHA
A blended refrigerant is a mixture of two or more refrigerants that is classified as;
Azeotropic, near-azetropic or zeotropic
When a fluorinated refrigerant decomposes, they can also form a short lived gas called _________?
What is Carbon Fluoride, COF 2?
What is the refrigerant concentration limit used for?
What is to determine the maximum concentration of a refrigerant allowed in an occupied space
What is R-452B (Classification)
What is a Zeotriopic HFC/HFO
When using an A2L, A2 or an A3 as a refrigerant trace gas the amount must not exceed ____ %?
25% of the lower flammability limit (LFL) for the refrigerant as listed in ASHRAE standard 34.
Filter driers are used in almost all refrigeration circuits. Filter driers perform two functions. What are the two functions?
Filter particulate and collect moisture from the refrigerant in a sealed refrigeration system
Name two types of high flammability refrigerants
What is R-290 and R600a