Free HRAI Canada’s Ozone Layer Protection Awareness Program Exam Practice Questions

Sample Practice Questions

Try these 10 sample questions from the HRAI Canada’s Ozone Layer Protection Awareness Program Exam practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A technician helps select a replacement cooling unit after the building's use has changed. What should determine the unit's design cooling capacity?

   1. A.The refrigerant quantity recovered from the old unit
   2. B.The cooling load calculated for the building's current needsCorrect answer: B
   3. C.The pressure rating marked on the refrigerant container
   4. D.The maximum cooling output available in the product range

   Explanation: The Code states, "The refrigerant and cooling system should be selected to meet the calculated design cooling load." The change of use calls for capacity matched to the calculated demand, rather than charge quantity, container rating or the largest available unit.

   Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 2.0 Design — Load calculation

2. 2An apprentice reviews the molecular formula of the gas that forms the protective ozone layer. Which formula represents ozone?

   1. A.O2
   2. B.CO2
   3. C.O3Correct answer: C
   4. D.N2O

   Explanation: ECCC states, "as ozone (O3)" Ozone consists of three oxygen atoms; O2 is ordinary molecular oxygen, CO2 is carbon dioxide and N2O is nitrous oxide.

   Reference: ECCC Ozone layer overview — The ozone gas

3. 3Before checking individual joints for leaks, a technician checks for background refrigerant contamination. Which space does the Code say must be free of that contamination?

   1. A.The refrigerant receiver
   2. B.The compressor crankcase
   3. C.The condenser tubing
   4. D.The mechanical roomCorrect answer: D

   Explanation: The Code states, "ensure that the mechanical room is not contaminated with refrigerant before leak testing" The room's background atmosphere must be checked. Internal system spaces normally contain refrigerant and are not the required clean background.

   Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 4.4 Leak testing — Leak testing procedure

4. 4When preparing charging lines, a technician installs self-reseating valves near the line ends. What distance from the ends does the Code specify?

   1. A.5 to 10 cm
   2. B.15 to 30 cmCorrect answer: B
   3. C.45 to 60 cm
   4. D.75 to 100 cm

   Explanation: The Code states, "install either self-reseating or isolation valves at 15 to 30 cm (6 to 12") from the end of the charging lines" The stated placement is 15–30 cm from the ends. The other intervals place the valves outside that specified range.

   Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 4.9 Charging — line valves

5. 5During functional start-up testing of a three-phase cooling system, a technician opens one electrical phase. What response should be confirmed?

   1. A.The system continues operation on the remaining phases
   2. B.The system restarts at a reduced compressor speed
   3. C.The system shuts down when the phase is openedCorrect answer: C
   4. D.The system changes to continuous pump-down operation

   Explanation: The source states, "if operating on three-phase electrical power, confirm that the system shuts down if any one of the phases is opened" The required functional response is shutdown on loss of any phase. Continued, reduced-speed and pump-down operation are different operating states.

   Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 4.1 System start-up — electrical verification

6. 6A technician uses equipment that directly recovers and recycles refrigerant by removing particles, moisture, acid and oil, without the supplier's separate reclamation process. Which Code recovery category is this?

   1. A.Type 1 active recovery
   2. B.Adsorption recovery
   3. C.Type 2 active recoveryCorrect answer: C
   4. D.Refrigerant reclamation

   Explanation: The source states, "in type 2, the active recovery and recycle equipment recovers refrigerants and improves their quality by removing particulate matter, moisture, acid and oil" Type 2 directly recovers and cleans. Type 1 simply recovers; adsorption sends a resin container for supplier reclamation, and reclamation is the separate reprocessing category.

   Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 4.7 Recovery, reuse, recycling and reclaiming — Refrigerant recovery methods

7. 7Four refrigeration systems are located on private land in Canada, outside federal or aboriginal lands. Which owner's system falls under federal halocarbon rules by the ownership criterion?

   1. A.A municipal recreation department
   2. B.A Government of Canada departmentCorrect answer: B
   3. C.A private condominium corporation
   4. D.A provincial school authority

   Explanation: The Regulations state, "owned by Her Majesty in right of Canada, a board or agency of the Government of Canada, a Crown corporation" Federal-government ownership establishes this criterion. The other stated owners are not federal bodies; the stem also removes the separate federal/aboriginal-land trigger.

   Reference: Federal Halocarbon Regulations, 2022 (SOR/2022-110) — Section 2(1)(a)

8. 8A project team wants to use life-cycle costing when choosing a cooling system. At what point does the Code say this analysis is usually carried out?

   1. A.During the first scheduled preventive-maintenance visit
   2. B.During the final recovery of the system's refrigerant
   3. C.During the early conceptual stages of the designCorrect answer: C
   4. D.During the first operating-season performance review

   Explanation: The Code states, "The analysis is usually carried out very early in the conceptual stages of a design while there is the greatest opportunity for cost savings, and can reduce under- or over-designing." Early conceptual design offers the stated opportunity to change the design and save costs; the other stages occur after those choices.

   Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 2.0 Design — Life-cycle costing/analysis

9. 9A technician explains which atmospheric layer is being protected by controlling ozone-depleting refrigerant emissions. Where is the ozone-rich protective layer located?

   1. A.StratosphereCorrect answer: A
   2. B.Troposphere
   3. C.Mesosphere
   4. D.Thermosphere

   Explanation: ECCC states, "Approximately 90 per cent of all ozone is produced naturally in the stratosphere." The protective ozone concentration is stratospheric. The other options are different atmospheric layers.

   Reference: ECCC Ozone layer overview — The location of the ozone layer

10. 10An outdoor leak test must be performed while wind is dispersing gas near the suspected leak. What adaptation does the Code recommend?

    1. A.Shield the test area with a tarpCorrect answer: A
    2. B.Raise the test pressure to the relief setting
    3. C.Heat the refrigerant container with warm water
    4. D.Route the system through its oil separator

    Explanation: The Code states, "shield the area when leak testing in windy conditions (for example, using a tarp)" Shielding limits wind interference at the test area. Pressure adjustment, container heating and oil separation address different physical processes and do not shield the location.

    Reference: ECCC Environmental Code of Practice for Elimination of Fluorocarbon Emissions — 4.4 Leak testing — Leak testing procedure