What is the layer of the Stratosphere that protects us from excessive Ultra Violet radiation is comprised of?
Ozone
100
Technicians who perform system service on small appliances must have what level of certification/s?
Type I or Universal certifications
100
The strial process and refrigeration unit with 50 pound charge or more with a annualized leak rate of what percent or more must have the leak repaired?
35%
100
What is maximum test pressure you should test a low pressure refrigeration system at and why?
10 PSI because the relief device is set to relief any pressure exceeding 15 PSI
100
What type of system can be worked on with Type III certification
Low Pressure
200
What is Crop loss, eye disease and skin cancer have been attributed to;
Depletion of the Stratospheric ozone
200
How is a small appliance defined by EPA.
Appliance manufactured, charged and hermetically sealed in a factory with 5lbs. or less of refrigerant.
200
Unless plans are made to replace a system exceeding the maximum leak rate. The system must be repaired within how many days?
30 Days
200
The owner must maintain records of refrigerant added during services and maintenance on equipment that contains _____lbs. of refrigerant or greater.
with charges of 50lbs or greater
200
What conditions allow for a system to be opened and repaired without recovering the refrigerant to the required vacuum level?
system with a large leak and system pressure at atmospheric pressure.
300
How many chlorine atoms does it take to destroy 100,000 ozone molecules?
One
300
If regulations change after the technician has been certified?
The technician is responsible for complying with any future changes in the EPA regulation.
300
All refrigeration and HVAC systems are protected by __________ and must not be connected in __________?
Pressure Relief valves and must not be connected in Series
300
After all the liquid has been removed from a average 350 ton system...approximately how much vapor would remain in the system?
Approximately 100lbs of vapor
300
Technicians have been required to be certified to service, maintain or dispose of appliances containing regulated refrigerants since?
November 14 1994
400
HCFC's contain what?
Hydrogen, Chlorine, Fluorine and Carbon
400
Recovery equipment manufactured after November 15, 1993 must be capable of recovering
90% refrigerant or achieving an 4 inches of vacuum
400
Under EPA regulations, a "major repair" means any maintenance, service or repair involving the removal of any or all of the following components;
compressor, condenser, evaporator or an auxiliary heat exchanger coil.
400
When installing more then one relief valve the installation configuration/method must be in?
Must be installed in Parallel
400
System dependent or passive recovery equipment?
Captures refrigerant into a non-pressurized container with the assistance of the appliance compressor or available pressure from the appliance.
500
Which refrigerant has the highest ODP?
CFC's
500
Recovering multiple types of refrigerant in the same recovery cylinder could.
Will make the reclaimed refrigerant non recoverable and additional charge may be levied for disposal.
500
What ASHRAE Standard ______ requires a refrigerant sensor that will sound an alarm and automatically start a ventilation system in occupied equipment rooms where refrigerant from a leak will concentrate.
ASHRAE Standard 15
500
If a strong odor is detected during the recovery process what may have occurred?