At the Core
HCFC contains?
A. Chlorine, Fluorine, Carbon
B. Hydrogen, Fluorine, chlorine, carbon
C. Hydrogen, Fluorine, Carbon
D. Hydrogen, Fluorine, Olefin
B. Hydrogen, Fluorine, chlorine, carbon
A industrial process that contains 1,000lbs of R-22 has to perform a leak test, how often are you supposed to come and check it?
A - 3 MONTHS
B - 90 DAYS
C - 12 MONTHS
D - 3 YEARS
3 months
The Condenser?
A. Changes high pressure vapor to a high-pressure liquid.
B. Changes low pressure vapor to a low-pressure liquid
C. Changes high pressure liquid to a low-pressure liquid
D. Changes a low-pressure liquid to a low-pressure vapor.
A. Changes high pressure vapor to a high-pressure liquid.
Recovering multiple types of refrigerants in the same cylinder:
Is an acceptable field service practice.
Will make the reclaimed refrigerants unreclaimable.
Will require venting to properly dispose of it.
Will lower the pressure in the recovery cylinder.
Will make the reclaimed refrigerants unreclaimable.
What does The EPA mandate during the repair of a leak in appliances if the leak rate exceeds the limit?
The refrigerant must be recovered, and the leak must be repaired.
What are the basic parts of the refrigeration cycle?
Compressor, Condenser, Metering Devices, and Evaporator
A small appliance is defined by EPA as:
Appliances charged, and hermetically sealed in a factory that contain 8 lbs or less of refrigerant.
Appliances charged, and hermetically sealed in a factory that contain 10 lbs or less of refrigerant.
Appliances with internal volumes no greater than 3 cubic feet
Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs or less of refrigerant.
4. Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs or less of refrigerant.
What is the standard pressure required during a standard pressure vacuum test of a refrigeration system under Type 3 EPA regulations?
No rise above 500 microns
A fine up to what can be applied if you violate the clean air act?
44,539
The EPA required evacuation level for recovery or recycling equipment used on low pressure system is?
25 INCHES of HG absolute (VACUMM)
What are the colors of the recovery tank?
Yellow top, Grey body
System-dependent recovery methods may only be used on appliances containing
15lbs or less
Where is the purge unit located in a low-pressure system?
On the top of the condenser
After the refrigerant is recovered, what can be used to flush out the system?
Nitrogen
What is a Type 1 appliance?
Uses 5 pounds or less refrigerant
Reused refrigerant containers under high-pressure must be hydro statically tested how often?
5 years
Leaks must be repaired on industrial process and refrigeration units with a 50-pound charge or greater when the annualized leak rate reaches _____ or more.
A. 10%
B. 20%
C. 30%
D. 40%
C. 30 %
A low-pressure chiller used for comfort cooling must be repaired if it has an annual leak rate of _______ of the total.
10 percent
Applying heat, with a heat gun, to the compressor;
can help free-up a bound compressor motor.
can help vaporize any trapped liquid refrigerant during recovery.
can help remove trapped refrigerant vapor during recovery.
can aid in isolating and pinpointing a refrigerant leak.
2. can help vaporize any trapped liquid refrigerant during recovery.
DAILY DOUBLE !!!!!!!!!!!!!!!!! POINTS COUNT AS 2X'S
WHEN ADDING REFRIGERANT TO AN UNDERCHARGED SYSTEM WHAT STATE OF REFRIGERANT IS THROTTLED IN THE LOW SIDE WITH THE SYSTEM OPERATING?
WHAT IS LIQUID PHASE
DAILY DOUBLE !!!!!!!!!!! POINTS WORTH 2X'S
If a person is caught violating the Clean Air Act, this person could be in a lot of trouble, what are the 3 discipline actions that this person may have against them
1- fine of $44,539
2- appear in court
3- loss of EPA Cert.
A high-pressure appliance containing 210 lbs. of R-407C refrigerant must be evacuated (recovered) to a level of
A. 15 inches of vacuum
B. 10 inches of vacuum
C. 4 inches of vacuum
D. 0 inches of vacuum
B. 10 inches of vacuum
DAILY DOUBLE !!!!!!!!!!!!! POINTS ARE WORTH 2X'S
PROPANE CYLINDERS FOR GRILLING SHOULD NEVER BE USED AS A REFRIGERANT, AS THEY CONTAIN ____________ , AS THEY CAN DAMAGE REFRIGERATION EQUIPMENT.
WHAT IS IMPURITIES
5.) When evacuating a system, the hose should be
As short in length as large in diameter as possible
Suitably Sized to connect to a gauge manifold
Coiled and taped together
Colored red or blue to meet codes
As short in length as large in diameter as possible
WHAT ARE THE DIFFERENCES BETWEEN AZOTROPIC AND NON-AZOTROPIC REFRIGERANTS?
AZOTROPIC = EVAPORATES AND CONDENSES AT A CONSTANT PRESSURE. MIXTURE OF 2 OR MORE REFRIGERANTS.
NON-AZOTROPIC = MIXTURE OF REFRIGERANTS THAT HAVE DIFFERENT BOILING POINTS. BINARY OR TERNARY BLENDED REFRIGERANTS.