EPA Practice Test (608 Core) 2

Question 1

The EPA Section 608 "Core" exam section covers knowledge required of ALL certified technicians. Which topic is specifically part of the Core exam?

Accepted Answer

Ozone depletion, the refrigerant recycling mandate, and the venting prohibition

Answer

The Core section of the EPA Section 608 exam covers fundamental knowledge that every refrigerant handling technician must have, regardless of specialty. Core topics include: stratospheric ozone depletion and its causes, the Clean Air Act's refrigerant recycling mandate, the venting prohibition, refrigerant recovery requirements, and safe refrigerant handling practices. Type-specific procedures are tested in the Type I, II, III, and Universal sections.

Question 2

What is the refrigerant numbering system's significance for the first digit after "R-" for single-component refrigerants?

Accepted Answer

The first digit indicates the number of carbon atoms minus one

Answer

The ASHRAE refrigerant numbering system uses a specific formula for single-component halocarbons: R-(m+1)(n)(p+1) where m = carbon atoms, n = hydrogen atoms, p = fluorine atoms. The first significant digit in the series represents (carbon atoms - 1). For example, R-22 has one carbon atom (m=1, m+1=2 in the tens position), two hydrogen atoms... Understanding this system helps technicians identify refrigerant families.

Question 3

What class of substances are specifically regulated under Section 608 as "class I" ozone-depleting substances?

Accepted Answer

CFCs (chlorofluorocarbons) like R-11, R-12, R-113, R-114, and R-502

Answer

Under the Clean Air Act, Class I ozone-depleting substances include the most damaging compounds with the highest ODP values: CFCs such as R-11, R-12, R-113, R-114, R-115, R-500, R-502, and halons. Class II substances include HCFCs, which have lower but non-zero ODPs. Both classes are regulated under Section 608, with Class I substances having been phased out earlier than Class II substances.

Question 4

Under EPA Section 608, what must a technician do before disposing of a refrigerant-containing appliance?

Accepted Answer

Remove and recover the refrigerant using approved recovery equipment

Answer

Before disposing of any appliance containing regulated refrigerants, the technician (or final disposal facility for certain small appliances) must remove and recover the refrigerant using EPA-approved recovery equipment. This prevents the refrigerant from being released as the appliance is crushed, shredded, or processed. No EPA notification or disposal permit is specifically required — only proper refrigerant recovery.

Question 5

A refrigerant is identified as having a boiling point of approximately -41°F at atmospheric pressure. Which refrigerant does this most closely match?

Accepted Answer

R-22 (boiling point -41.4°F)

Answer

R-22 (HCFC-22, chlorodifluoromethane) has an atmospheric boiling point of approximately -41.4°F (-40.8°C), making it a high-pressure refrigerant that is a vapor at room temperature. R-11 and R-123 have boiling points well above 0°F, meaning they are liquids at room temperature and operate under vacuum. R-134a boils at -15.1°F. Knowing boiling points helps technicians understand system pressure behavior.

EPA 608 609 Practice Test

EPA 608 609 Practice Test

EPA Practice Test (608 Core) 2