EPA 608 Type I Practice Test – Small Appliances
Small appliances: refrigerators, window units, PTACs and vending machines with 5 lb or less. Tap an answer to check it.
Score: 0 / 0 (30)
Question 1
What is a 'small appliance' under Section 608?
Small appliances include home refrigerators and freezers, window and portable A/C units, PTACs, dehumidifiers, water coolers and vending machines charged at the factory with 5 lb or less.
Question 2
Which of these is a small appliance?
A home refrigerator is factory-charged and sealed with less than 5 lb of refrigerant, so it is a small appliance.
Question 3
Which of these is NOT a small appliance?
Split systems are connected and charged in the field, so they are not small appliances even if the charge is small. They need Type II.
Question 4
Using recovery equipment made BEFORE November 15, 1993, how much refrigerant must be recovered from a small appliance?
Equipment made before Nov 15, 1993 must recover 80% of the charge, whether or not the compressor works (or pull 4 inches of Hg vacuum).
Question 5
Using recovery equipment made AFTER November 15, 1993, with a WORKING compressor, how much refrigerant must be recovered from a small appliance?
With newer equipment: 90% if the appliance compressor works, 80% if it does not, or evacuate to 4 inches of Hg vacuum.
Question 6
Using recovery equipment made AFTER November 15, 1993, with a compressor that does NOT work, how much must be recovered?
When the appliance compressor is not working, 80% recovery is required (or 4 inches of Hg vacuum).
Question 7
Instead of the percentage rule, a small appliance may also be evacuated to:
The rule lets you either recover the required percentage or pull the appliance down to 4 in. Hg vacuum.
Question 8
When recovering from a small appliance with an INOPERATIVE compressor, where should access valves be installed?
Without a working compressor, refrigerant is trapped on both sides of the system. Access on both sides makes recovery faster and more complete.
Question 9
When using a system-dependent (passive) recovery device on a small appliance with a WORKING compressor, you should:
With passive recovery the appliance's own compressor does the work, so it should be run during recovery.
Question 10
How can you help release refrigerant trapped in the oil of an INOPERATIVE compressor during passive recovery?
Warming the compressor and tapping it frees refrigerant dissolved in the oil.
Question 11
With passive recovery, what may be used to help move refrigerant into a non-pressurized recovery container?
A special non-pressurized recovery bag/container can be used with a vacuum pump to pull refrigerant out. Never pressurize it.
Question 12
What should be done with solderless (piercing) access fittings when service is complete?
Piercing valves are only for temporary access. Leaving them on the line invites a slow leak.
Question 13
What is the likely replacement refrigerant for R-12 in small appliances like refrigerators?
R-134a (an HFC) replaced R-12 in household refrigerators. New units often use isobutane (R-600a) instead.
Question 14
How can you identify the refrigerant in a small appliance?
The data plate shows the refrigerant. Comparing pressure with temperature (using a PT chart) confirms it and can show contamination.
Question 15
If the pressure in a sealed recovery cylinder is higher than the PT chart pressure for its temperature, this likely means:
Air does not condense, so it adds extra pressure above the refrigerant's saturation pressure.
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▶ Get it on Google PlayQuestion 16
Before checking pressure against a PT chart, a recovery cylinder should:
The PT comparison only works when the refrigerant temperature is known and stable.
Question 17
Who is responsible for making sure refrigerant is removed from a small appliance before final disposal?
The final processor must recover the refrigerant or get a signed statement that it was already properly recovered.
Question 18
A scrap recycler accepts a refrigerator without recovering the refrigerant. What must they get?
The statement includes the name and address of the person who recovered the refrigerant and the date.
Question 19
Which certification is needed to service a window air conditioner?
Window units are small appliances, covered by Type I.
Question 20
Under the rule, what is the passing score for a Type I test taken by mail-in (unproctored) format?
Closed-book proctored tests need 70%. The Type I mail-in format needs 84% (21 of 25).
Question 21
What is a common sign that a small appliance contains a contaminated or wrong refrigerant?
If pressure and temperature don't match the PT chart for the nameplate refrigerant, suspect air or a different refrigerant. Recover it into a separate cylinder.
Question 22
Some older small appliances use refrigerants like sulfur dioxide or methyl formate. What should you do?
These old refrigerants are toxic and can damage standard recovery machines. They need special handling.
Question 23
Can a system-dependent (passive) recovery device be used on a household refrigerator?
System-dependent equipment may not be used on appliances with more than 15 lb, so it is fine for small appliances.
Question 24
Before opening a small appliance for repair, you must:
Opening a small appliance without proper recovery is a venting violation.
Question 25
Which hazard exists when brazing on a line that still contains refrigerant?
Always recover refrigerant before brazing. Heat decomposes refrigerant into acids and phosgene.
Question 26
A recovery device used with small appliances should be checked for what before use?
Leftover refrigerant in the recovery device would contaminate the next recovery.
Question 27
What should the technician do before connecting a recovery cylinder that will receive R-134a?
A dedicated, evacuated cylinder prevents mixing refrigerants and noncondensables.
Question 28
Which certification type covers servicing a vending machine with 2 lb of refrigerant?
A vending machine charged and sealed at the factory with 5 lb or less is a small appliance.
Question 29
After recovery from a small appliance, the 4 inches of Hg vacuum level is measured:
Vacuum levels in the rule are in inches of mercury below standard atmospheric pressure.
Question 30
Why should the compressor oil of a burned-out small appliance be handled with care?
A compressor burnout makes the oil acidic. Wear gloves and goggles and use an acid-removing filter drier when repairing.
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