Core Flashcards

(41 cards)

1
Q

Which type of refrigerant contains no chlorine?

A

HFCs

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2
Q

The chlorine in CFCs and HCFCs;

A

will not dissolve in water.

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3
Q

Which international agreement (Treaty) regulated the production and use of CFCs, HCFCs, halons, methyl chloroform and carbon tetrachloride?

A

Montreal Protocol

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4
Q

The condenser

A

changes a high-pressure vapor to a high-pressure liquid.

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5
Q

Which of the following refrigerant has a GWP closest to “1”?

A

R-1233zd

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6
Q

An ozone molecule contains;

A

Three oxygen atoms

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7
Q

The low-side test-pressure data-plate value should be used by a technician to determine a safe pressure for:

A

leak testing.

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8
Q

The compressor

A

changes a low-pressure vapor to a high-pressure vapor.

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9
Q

Recover any remaining refrigerant and then render the cylinder useless, then recycle the metal is the proper disposal method for;

A

Disposable cylinders

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10
Q

Before shipping any used refrigerant cylinders, check that the cylinder meets what standards:

A

Department of Transportation

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11
Q

Clean refrigerant for reuse by separating the oil from the refrigerant and removing moisture from the refrigerant by passing it through one or more filter driers, is the definition of;

A

Recycle

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12
Q

Silicone elastomers, for use in seals and gaskets, are not compatible with which refrigerants?

A

HFOs

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13
Q

A refrigerant cylinder designed to hold recovered refrigerant has a:

A

grey body and yellow top.

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14
Q

A single chlorine atom can destroy how many ozone molecules?

A

100,000

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15
Q

Crop loss, eye disease, and skin cancer have been attributed to;

A

Depletion of Stratospheric ozone

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16
Q

HCFCs contain;

A

Hydrogen, Chlorine, Fluorine, and Carbon

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17
Q

HFCs

A

will not damage stratospheric ozone but have a high GWP.

18
Q

Which of the following refrigerants is an HFO?

19
Q

How much can a person be fined per day per violation for knowingly releasing a regulated substance that violates the Clean Air Act?

20
Q

The molecule found in CFCs and HCFCs that depletes ozone is:

21
Q

Which ASHRAE classification means slightly flammable?

22
Q

Which of the following has the highest Ozone Depletion Potential?

23
Q

Reusable refrigerant containers under high-pressure must be hydrostatically tested how often?

24
Q

To process refrigerant to a level equal to new (virgin) product specifications as determined by chemical analysis defines;

25
What is the Significant New Alternatives Policy (SNAP) Program?
EPA's program that identifies refrigerants with lower overall risks to human health and the environment.
26
When is refrigerant venting allowed under EPA regulations?
venting is prohibited
27
How often should leak detection be performed on commercial refrigeration equipment?
Annually
28
When must technicians recover refrigerant from appliances?
Before opening the system for maintenance
29
Three R definition
Recover, Recycle, Reclaim
30
What does CFC stand for, type
chlorofluorocarbon (R-12)
31
What does HCFC stand for, type
hydrochlorofluorocarbon (R-22)
32
What does HFC stand for, type
hydrofluorocarbon (R-410A, R-134a)
33
What does ODP stand for
Ozone-Depletion Potential
34
What does GWP stand for
Global Warming Potential
35
Which of the elements in CFCs and HCFCs depletes the ozone?
Chlorine
36
One ozone molecule contains how may oxygen atoms?
3
37
The evaporator
changes a low-pressure vapor to a low temperature.
38
Refrigerant enters the metering or expansion device of a refrigeration system in what state?
liquid
39
low-pressure refrigerant
R-123 (HFO)
40
Reusable refrigerant containers under high-pressure must be hydrostatically tested how often?
5 years
41
The low-side test-pressure data-plate value should be used by a technician to determine a safe pressure for:
leak testing