ODP Study Guide 2026
Everything you need to pass the ODP exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 ODP Exam Format at a Glance
📚 ODP Topics to Study (21)
✍️ Sample ODP Questions & Answers
1. In Ozone Layer Depletion, what does pH measure?
pH measures the hydrogen ion concentration in a solution, indicating its acidity (pH 7) on a scale from 0 to 14.
2. What is the environmental advantage of using 'natural refrigerants' such as ammonia (R-717) or CO2 (R-744) in industrial refrigeration over traditional CFCs?
Natural refrigerants like ammonia and CO2 have zero ODP and very low (CO2) or zero (ammonia) GWP, making them the most environmentally favorable options for eliminating both ozone and climate impacts.
3. Which type of recovery equipment is required when recovering refrigerant from appliances manufactured before November 15, 1993?
EPA requires that all recovery equipment used for pre-1993 appliances be either UL-listed or approved under EPA's standards for proper containment.
4. Which term describes refrigerant that has been recovered, processed to ARI 700 purity standards, and can be resold as virgin-equivalent?
Reclaimed refrigerant has undergone processing at a certified facility to meet ARI 700 purity standards, making it equivalent in quality to virgin refrigerant.
5. What document must accompany refrigerant sent to a reclaimer to prove its origin and contents?
A refrigerant transfer certificate or chain-of-custody form documents the source, quantity, and type of refrigerant being sent for reclamation.
6. Under EPA Section 608, technicians must recover refrigerant before opening or disposing of systems containing how much refrigerant?
EPA Section 608 requires refrigerant recovery before servicing or disposing of any appliance regardless of the amount of refrigerant it contains.