EPA 608 Type I Practice Test
On a daily basis, which of the following should be verified in refrigerant recovery equipment?
Correct answer: Both Oil Levels and for Refrigerant Leaks
All recovery equipment should be checked for oil levels and refrigerant leaks on a daily basis. These should be replaced whenever necessary.
Technicians who work on small appliances with sealed systems must have:
Correct answer: Type I or Universal certification
Persons handling refrigerant during maintenance, service or repair of small appliances must be certified as either a Type I Technician or as a Universal Technician. (Page16 ESCO EPA 9TH V2 Edition Prep Manual)
Is it true or false that recovery devices should not be used on hydrogen-containing equipment?
Correct answer: True
Systems built before 1950 contain many different chemicals including sulfur dioxide and methyl formate.
To determine the type of refrigerant, which purity test is used?
Correct answer: ARI 700
ARI 700 is the established standard. This standard was created by the Air Conditioning, Heating, and Refrigeration Institute (AHRI)
Equipment for recovery must be:
Correct answer: Certified by an EPA-approved testing laboratory.
Recovery equipment used during the maintenance, service, or repair of small appliances that use CFCs, HCFCs, and HFCs must be certified by an EPA-approved laboratory. (Page16 ESCO EPA 9TH V2 Edition Prep Manual)
Only one service connection is required for which of the following?
Correct answer: Self-Contained Recovery Units
Self-contained recovery equipment is built to recover the refrigerant without using the unit's compressor.
The EPA defines a small appliance as:
Correct answer: Appliances manufactured, charged, and hermetically sealed in a factory that contain 5 lbs. or less of refrigerant.
The EPA definition of a small appliance includes products manufactured, charged, and hermetically sealed in a factory with five pounds of refrigerant or less. (Page16 ESCO EPA 9TH V2 Edition Prep Manual)
In a refrigeration system, air causes _____ discharge pressure.
Correct answer: Higher
You can use a pressure/temperature chart to detect noncondensables. Higher discharge pressure indicates the presence of air.
You should never do this when a system is in a deep vacuum:
Correct answer: energize the compressor.
You should never energize the compressor. A hermetic compressor's motor winding could be damaged if energized when under a deep vacuum. (Page 22 ESCO EPA 9TH V2 Edition Prep Manual)
During the recovery process, there is a strong odor. Which of the following is most likely to be the source of the problem?
Correct answer: Compressor Burnout
A strong odor is an indicator of compressor burnout. Nitrogen can be used to get rid of the debris (as long as there is no refrigerant in the system).
When using a system-dependent recovery system on a compressor-operated appliance, the technician should:
Correct answer: Run the compressor and recover from the high side of the system only.
An appliance with an operating compressor and completely restricted capillary tube or metering device requires only one access valve on the high side of the system. (Page 17 & 18 ESCO EPA 9TH V2 Edition Prep Manual)
Which method is the most effective for transporting refrigeration cylinders?
Correct answer: Upright
Cylinders should be transported in an upright position.
Which of the following should you use to flush the system after the refrigerant has been recovered?
Correct answer: Nitrogen
When nitrogen is used to pressurize or blow debris out of the system, the nitrogen may be vented to the ambient air. (Page 18 ESCO EPA 9TH V2 Edition Prep Manual)
Only a stable _________ allows you to accurately read refrigerant pressure.
Correct answer: Temperature
A pressure/temperature chart can be used to detect noncondensables. You should wait until the temperature of the tank stabilizes.
The EPA's requirement for repairing small appliance leaks is:
Correct answer: Leaks should be repaired whenever possible.
The EPA does not require leak repair for small appliances, but leaks should be repaired whenever possible. (Page 17 ESCO EPA 9TH V2 Edition Prep Manual)
When which of the following is vented in a closed environment, it can cause an explosion?
Correct answer: Hydrogen
Small amounts of liquid hydrogen can be explosive when combined with air and small amounts of energy.
Which HC refrigerant can be used in new small domestic appliances?
Correct answer: R-600a
Hydrocarbon (HC) R-600a is an approved refrigerant for new household refrigerators, freezers, and combination refrigeration/freezers. (Page 16 ESCO EPA 9TH V2 Edition Prep Manual)
Mixed refrigerants are received in a tank at a reclamation facility. What options do they have?
Correct answer: All of the Above
Refrigerants should not be mixed in a recovery tank. A reclamation facility can execute any of the options listed above.
Which of the following refrigerants is chlorine-free?
Correct answer: HFC
HFCs do not contain Chlorine they do have a very high Global Warming Potential, or GWP. GWP is a measurement that is used to measure the impact a Greenhouse Gas has on the climate and environment.
The refrigerant recovery cylinder should not be filled to more than _____% of its capacity.
Correct answer: 80 percent
If it is filled beyond 80% during increase in temperature the refrigerant expands results in increase in pressure inside the cylinder which can lead to bursting of cylinder
Which of the following has the greatest potential for Ozone Depletion (ODP):
Correct answer: CFC
CFCs has highest Ozone Depletion Potential because of the presence of chlorine element which reacts with ozone at stratosphere
In a refrigerant system, the ____connects the evaporator to the compressor:
Correct answer: Suction Line
The suction line connects the evaporator to the compressor in a refrigerant system.
Which of the following gases is used to pressurize (for leak checking) or blow debris out of a sealed system after recovering refrigerant:
Correct answer: Nitrogen gas
Nitrogen is colorless, odourless, non inflammable and readily available (economical) gas. It may not cause any acidic formation when reacts with oxygen or moisture which can result in corrosion. CO2 in presence of moisture forms carbonic acid
Refrigerated appliances are divided into _____ groups by the EPA.
Correct answer: Five
1. Small appliances (Type I)
2.Low pressure appliances (Type III)
3. Medium Pressure appliances (Type II)
4. High pressure appliance (Type II)
5. Very high pressure appliances (Type II)
A recovery cylinder can store a maximum of _____ refrigerants:
Correct answer: One
In recovery cylinder refrigerants shall not be mixed