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Question 1
What is the primary environmental concern related to CFC refrigerants?
A. Acid rain formation
B. Ozone layer depletion
C. Soil contamination
D. Noise pollution
Correct Answer: B. Ozone layer depletion
Rationale: CFCs release chlorine atoms in the stratosphere, which destroy ozone molecules.
Question 2
EPA 608 Type I certification allows servicing of which equipment?
A. Large commercial chillers
B. Motor vehicle air conditioners
C. Small appliances
D. Industrial refrigeration systems
Correct Answer: C. Small appliances
Rationale: Type I is specifically for small appliances containing 5 lbs or less of refrigerant.
Question 3
A “small appliance” is defined as one that:
A. Uses propane as fuel
B. Has factory-sealed refrigerant circuits
C. Contains more than 10 lbs refrigerant
D. Uses water cooling
Correct Answer: B. Has factory-sealed refrigerant circuits
Rationale: Small appliances are hermetically sealed and factory-charged systems.
Question 4
What is the maximum allowable refrigerant charge that defines a small appliance?
A. 2 lbs
B. 3 lbs
C. 5 lbs
D. 10 lbs
Correct Answer: C. 5 lbs
Rationale: EPA defines small appliances as containing 5 pounds or less of refrigerant.
,Question 5
Which gas is commonly used as a replacement for CFCs?
A. Helium
B. HFCs
C. Nitrogen
D. Oxygen
Correct Answer: B. HFCs
Rationale: HFCs do not contain chlorine and therefore do not deplete ozone.
Question 6
Refrigerant recovery refers to:
A. Destroying refrigerant
B. Cleaning refrigerant
C. Removing refrigerant and storing it externally
D. Adding refrigerant to a system
Correct Answer: C. Removing refrigerant and storing it externally
Rationale: Recovery involves transferring refrigerant to an external container.
Question 7
Which recovery method is most appropriate for a running small appliance?
A. Passive recovery
B. Active recovery
C. Vapor recovery
D. Liquid flooding
Correct Answer: C. Vapor recovery
Rationale: Type I systems typically use vapor recovery methods.
Question 8
Before disposing of a small appliance, refrigerant must be:
A. Burned off
B. Ventilated
C. Properly recovered
D. Diluted with air
Correct Answer: C. Properly recovered
Rationale: Releasing refrigerant into the atmosphere is illegal.
Question 9
What is the purpose of a filter drier in a refrigeration system?
A. Increase pressure
B. Remove moisture and contaminants
C. Store refrigerant
, D. Compress refrigerant
Correct Answer: B. Remove moisture and contaminants
Rationale: Filter driers trap moisture and debris to protect system components.
Question 10
Which refrigerant is an HCFC?
A. R-134a
B. R-22
C. R-410A
D. Ammonia
Correct Answer: B. R-22
Rationale: R-22 contains chlorine and contributes to ozone depletion.
Question 11
What happens if refrigerant is released into the atmosphere?
A. It becomes harmless
B. It contributes to global warming and ozone depletion
C. It increases oxygen levels
D. It improves air quality
Correct Answer: B. It contributes to global warming and ozone depletion
Rationale: Many refrigerants are greenhouse gases and ozone-depleting substances.
Question 12
Which tool is essential for checking system pressure?
A. Multimeter
B. Thermometer
C. Manifold gauge set
D. Vacuum pump
Correct Answer: C. Manifold gauge set
Rationale: Manifold gauges measure system pressure during service.
Question 13
The color of the low-pressure gauge is typically:
A. Red
B. Blue
C. Yellow
D. Green
Correct Answer: B. Blue
Rationale: Blue indicates the suction or low-pressure side.