WorksheetsEPA Review -- CORE pt 1 (English)
Total questions: 30
Worksheet time: 15mins
What makes HFOs less flammable than HCs?
Presence of hydrogen
Presence of carbon
Presence of fluorine
Presence of chlorine
What is a common issue with HFOs compared to traditional refrigerants?
They operate at lower temperatures
They have a shorter lifetime
They operate at higher compressor discharge temperatures
They are less efficient
What does GWP stand for in the context of refrigerants?
Global Warming Potential
General Water Pollution
Greenhouse Waste Product
Global Weather Prediction
What was the goal of the program established by the 1990 amendments regarding CFCs?
Increasing production
Phasing out production and use
Selling more CFCs
Designing new CFCs
By what year were halons completely phased out under the Montreal Protocol?
1994
1992
1990
2010
What is required for MVAC service technicians under the Clean Air Act?
Section 608 certification
Section 609 certification
Section 610 certification
Section 611 certification
What change did the EPA make to the 2016 ruling regarding refrigerant management?
Increased refrigerant production limits
Removed mandatory leak repair for zero ODP refrigerants
Required new refrigerant labeling
Banned all substitute refrigerants
Which type of refrigerant is exempt from the amended leakage rate and recordkeeping requirements as of 2018?
Refrigerants with high ODP
Refrigerants with zero ODP
Refrigerants with low GWP
Refrigerants with high GWP
What percentage of the system charge does a leak rate of 10 pounds per month represent for a system containing 100 pounds of charge?
5%
10%
15%
20%
What is the consequence if a technician fails to demonstrate their ability to perform proper procedures for recovering refrigerant?
A fine is issued
Certification is revoked
A warning is given
No consequence
How can recovery equipment be categorized?
By color and size.
By brand and model.
Into self-contained and system-dependent equipment.
By price and warranty.
What could the EPA do for minor violations of equipment use?
Ignore the violations.
Suspend certification for a period of time.
Offer a reward.
Promote the technician.
What is the EPA's requirement for refrigerant recovery from refrigeration equipment?
To ignore refrigerants.
To recover refrigerants.
To add more refrigerants.
To leave refrigerants in place.
Which protocol is used to test equipment for compliance with EPA standards?
AHRI 740 test protocol
EPA 123 test protocol
R-290 test protocol
ISO 9001 test protocol
What should be done to prevent air and contaminants from entering the system when it is opened?
Use a self-contained unit
Break the vacuum with nitrogen
Use system-dependent equipment
Recycle the refrigerant
What is a leak test trace gas mixture used for?
To cool the system
To pressurize the system and detect leaks
To clean the system
To replace refrigerants
What must be done after repairs are made to a system?
Add a large quantity of refrigerant
Add a small quantity of refrigerant
Replace the entire system
Vent the system
What is the requirement for acidity under the AHRI 700 standard?
Less than 0.1%
Less than 0.01%
Less than 1%
Less than 0.001%
What is the requirement for nonvolatile residue under the AHRI 700 standard?
Less than 10 ppm
Less than 100 ppm
Less than 50 ppm
Less than 200 ppm
What is the purpose of the EPA's Section 608 Recycling Program?
To promote new refrigerants
To ensure compliance with refrigerant recovery
To ban all refrigerants
To increase refrigerant production
What is the charge size limitation for flammable refrigerants in household refrigerators?
57 g (0.13 lb)
150 g (0.35 lb)
200 g (0.44 lb)
100 g (0.22 lb)
Where can flammable refrigerants like propane and isobutane be purchased?
HVAC/R supply houses
Grocery stores
Online retailers
Gas stations
What does the 609 MVAC certification allow?
Purchase of any refrigerant in any size container
Purchase of CFCs only
Purchase of HCFCs only
Purchase of HFCs only
What is the saturation pressure of a disposable R-410 cylinder with one pound of refrigerant at 90°F?
100 psig
150 psig
277 psig
300 psig
What is the recommended action if a cylinder is forgotten and left lying around?
Leave it as is
Store it in a safe place
Discard or recycle it
Use it for another purpose
What is the temperature behavior of R-22 at 200 psig?
It boils at 101 °F
It condenses at 150 °F
It freezes at 32 °F
It evaporates at 50 °F
What happens to the volumetric composition of non-azeotropic blends during evaporation or condensation?
It remains constant.
It changes at constant pressure.
It separates into individual components.
It behaves like a single refrigerant.
What is a characteristic of near-azeotropic refrigerant blends?
They have a large temperature glide.
They are identical to azeotropic blends.
They have a very small temperature glide.
They cannot be used in HVAC systems.
At what temperature does R-410A begin evaporation at 200 psig?
69.5 °F
70.0 °F
68.0 °F
71.5 °F
What is the primary difference between azeotropic and near-azeotropic blends?
Azeotropic blends have a larger temperature glide.
Near-azeotropic blends have a larger temperature glide.
Near-azeotropic blends have a smaller temperature glide.
Azeotropic blends cannot be used in HVAC systems.
