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EPA 608 > Level II > Flashcards

Level II Flashcards

1
Q

Ozone 03 Altitude

A

15-35K

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2
Q

Where is ozone found

A

Tropo and Stratosphere, highest in Stratosphere

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3
Q

Ground level ozone

A

Smog

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4
Q

1 Chlorine atom destroys

A

100k ozone

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5
Q

CFC are most harmful and last

A

70-100 years

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6
Q

Clean air act

A

-Federal law
-1990 608 ozone protection
-Regulated by EPA

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7
Q

Clean air act violation

A

$44,539/day
Prosecution
Confiscation
Loss of cert
5 years
Double 2nd offense

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8
Q

SNAP

A

Significant new alternative policy. Substitute refrigerants

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9
Q

Venting Probition

A

Illegal to vent CFC’s, HCFC’s, HFC’s and substitutes
$10,000 reward

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10
Q

Natural Refrigerants

A

R-290 propane
R-600A Isobutatane
R-717 Ammonia
R-728 Nitrogen
R-744 Co2

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11
Q

Montreal Protocol

A

1987
197 countries
Phase out CFC’s and HCFC’s

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12
Q

2016 Kingali Ammendment

A

Update to Montreal Protocol
Phase out HFC’s which contribute to global warming

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13
Q

Phase out dates

A

All HCFC’s by 2030
USA Dec 31 1995, CFC’s
Jan 1 2020, HCFC’s (R-22 and R142b)
Ozone predicted to normal 2065

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14
Q

AHRI

A

A/C, Heat, Refrigeration Institute
AHRI 700-2016 Purity standards for reclamation

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15
Q

CFC refrigerants

A

R-11
R-12

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16
Q

HCFC Refrigerant

A

R-22

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17
Q

Matter

A

Volume
Mass

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18
Q

MAtter is made up of

A

Atoms
Molecules

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19
Q

3 satiates of matter

A

Solid
Liquid
Gas or vapor

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20
Q

Changing liquid to vapor is

A

Boiling point or vaporization

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21
Q

Condensation point is

A

Vapor to liquid

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22
Q

Most common refrigeration type

A

Direct expansion vapor compression system

23
Q

Metering Device creates

A

Pressure drop

24
Q

CFC Refrigerant

25
HCFC Refrigerants
R-22 (most common) R-123 R-124
26
HFC Refrigerants
R-32 R-125 R-134a
27
HFO Refergerants
O for olifins has carbon R-123yf Not compatible with silcone
28
ODP
Ozone depleting potential
29
Ozone depleting potential
CFC’s R-11 most destructive #1 is most destructive #0 least
30
GWP
Global warming potential
31
Global warming potential
Compared to Co2 One ton of gas will absorb over 100 years Co2=1 R-12=10,900 R-410=2088 HFO and HC’s have low GWP
32
ASHRAE Standard 34
Flammability and Toxicity of Refrigerant
33
ASHRAE Standadard 34
Class 1=non flammable Class 2=low flammability Class 3=high flammability Class A=low toxicity Class B=High toxicity Subclass L=low flammability, slow burn rate
34
Refrigerant Blends
3 components= Ternary Can’t mix own blend Cause equipment to fail Void warranty Unpredictable temps
35
Types of blends
Azeotropic= 2 or more same boiling point R-502 Zeotrpopic= 2 or more different boiling point R-407c
36
Properties of blends
Zeotropic concerned with temperature glide which is difference between Dew and Bubble -Dew point=vapor to liquid -Bubble point=liquid t vapor Need to be charge as a liquid Leak at different rates Fractionation=settling in different layers
37
Retrofit Systems
Drop in requires no modification No substitute for R-22 without retrofit
38
Oil Properties
Viscus=slower than water Miscible=mix well Hydrolysis=water breaking something down Needs to be non flammable Must handle all temps and pressures
39
Mineral oil
Old systems CFD and HCFC’s
40
AB oil
Used with blends with CFC and HCFC systems
41
POE Oil or Ester Oil
Used in HFC and HFO systems
42
Equipment Classification
Based on pressure in liquid line High Med Low
43
System dependent recovery
Uses system compressor. Pressure high to low
44
Self Contained recovery
Does not rely on system
45
Process stub or service adaptor
Crimped pipe on compressor for CFC or HCFC
46
3 R’s
Recover= remove/store Recycle= clean for reuse. Filter dryer Reclaim= process and test to new ASHI 700-2016
47
Recovery equipment
15lbs or less=system dependant Over 15lbs=self contained
48
Vacuum Hoses
Short as possible Equal to or greater than pump connections
49
Factors of dehydration time
Equipment size Ambient temp Amount of moisture Suction line size Heat system to speed up
50
Hydrocarbons
Ground system
51
Pressure test
Do not exceed low side pressure Recover system to 15psi so refrigerant remains for leak test R-12 cannot be mixed with nitrogen *Over 50lbs, one before one after*
52
If flammable refrigerant is uses
Red marks 1” both directions Ground equipment
53
High to Very High Refrigerant. MEMORIZE
R-22 R-407A R-407C R-410A R-502
54
Max leak rate
Also known as Trigger rate or Threshold leak

EPA 608 (1 decks)

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