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CORE
LEVEL I
LEVEL II
LEVEL III
410-A
100
The layer of the Stratosphere that protects us from excessive Ultra Violet radiation is comprised of;
What is : Ozone
100
A small appliance is defined by EPA as;
What is : Appliances manufactured, charged, and hermetically sealed in a factory with 5 Lbs or less of refrigerant.
100
Industrial process and refrigeration units with a 50 pound charge or more with an annualized leak rate of _____ or more must have leaks repaired.
What is :15%
100
When pressurizing a system, do not exceed
What is :10 psig
100
A condensing unit designed for use with R-22:
What is : Both A and B
200
The molecule found in CFC's and HCFC's that depletes ozone is:
What is : chlorine
200
System-dependant or passive recovery equipment;
What is : Captures refrigerant into a non-pressurized container with assistance of the appliance compressor. .
200
What refrigerant can be used as a trace gas when checking for leaks?
What is : R-134a
200
What can be used to pressurize a chiller system before opening the system for a non-major repair?
What is : Controlled hot water
200
An overcharged system can cause:
What is : High side pressure increase
300
It has been a violation of EPA Section 608 regulations to vent HFC's since
What is : July 1, 1992
300
After the refrigerant has been recovered, which of the following can be used to flush the system?
What is :Nitrogen
300
A refrigerant sensor which will sound an alarm and automatically start a ventilation system in occupied equipment rooms fall under;
What is: ASHRAE Standard 15
300
After all the liquid has been removed from an average 350 ton approximately how much vapor refrigerant remains in the system
What is : 100 lbs.
300
Liquid lines used with R-22:
What is : May be used with R-410A if sized and properly cleaned
400
When chlorine monoxide is found in the stratosphere, it indicates that;
What is : the ozone layer is being depleted
400
Recovery equipment manufactured before November 15, 1993 must be capable of recovering.
What is : 80 percent of the refrigerant or achieving 4 inches of vacuum.
400
When pressurizing a system with nitrogen you should;
What is : charge through a pressure regulator.
400
Who establishes the refrigerant safety group standard
What is : ASHRAE
400
Charging an R-410A system until the sight glass is clear may result in;
What is : Both A and B
500
An ozone molecule contains;
What is : Three oxygen atoms
500
After recovering refrigerant, the Nitrogen used to flush the system may be:
What is : legally vented.
500
What happens to a refrigerant that is above the saturation temperature?
What is : It remains in a vapor state
500
During evacuation of systems with large amounts of water, it may be necessary to;
What is : increase pressure by introducing nitrogen to counteract freezing.
500
liquid changes to a vapor by absorbing:
What is : Superheat