EPA Section 608 — Type I
Leaks and service: practice questions
Our EPA 608 Type I bank has 15 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
Which leak test method is suitable for a small appliance?
- Electronic leak detector or soap bubbles
- Pressurizing with compressed air and oil
- Using an open flame near joints
- Pressurizing with oxygen
Show the answer
A. Electronic leak detector or soap bubbles — Use dry nitrogen if pressure testing is needed.
Question 2
Before installing a piercing valve, what should be checked?
- That the system has refrigerant pressure, to avoid drawing in air
- That the cylinder is empty
- That the oil is mineral oil
- That the appliance is plugged in
Show the answer
A. That the system has refrigerant pressure, to avoid drawing in air — If the system is empty, there is nothing to recover and air could enter.
Question 3
What is the most likely sign of a leak in a small appliance?
- Traces of oil around fittings or joints
- The compressor runs more quietly than it used to
- The cabinet is cold
- The light inside works
Show the answer
A. Traces of oil around fittings or joints — Refrigerant escapes with oil, leaving an oily residue.
Question 4
Which component removes moisture and contaminants from refrigerant?
- A filter-drier
- A capillary tube
- An access valve
- A thermostat
Show the answer
A. A filter-drier — Filter-driers are also used on recovery equipment.
Question 5
Which refrigerant may be found in older home refrigerators and freezers?
- R-12
- R-123
- R-410A
- R-11
Show the answer
A. R-12 — Many older domestic units used R-12; newer ones use R-134a or R-600a.