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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

A

R-11
R-12

25
Q

HCFC Refrigerants

A

R-22 (most common)
R-123
R-124

26
Q

HFC Refrigerants

A

R-32
R-125
R-134a

27
Q

HFO Refergerants

A

O for olifins has carbon
R-123yf
Not compatible with silcone

28
Q

ODP

A

Ozone depleting potential

29
Q

Ozone depleting potential

A

CFC’s R-11 most destructive
#1 is most destructive
#0 least

30
Q

GWP

A

Global warming potential

31
Q

Global warming potential

A

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
Q

ASHRAE Standard 34

A

Flammability and Toxicity of Refrigerant

33
Q

ASHRAE Standadard 34

A

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
Q

Refrigerant Blends

A

3 components= Ternary
Can’t mix own blend
Cause equipment to fail
Void warranty
Unpredictable temps

35
Q

Types of blends

A

Azeotropic= 2 or more same boiling point R-502
Zeotrpopic= 2 or more different boiling point R-407c

36
Q

Properties of blends

A

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
Q

Retrofit Systems

A

Drop in requires no modification
No substitute for R-22 without retrofit

38
Q

Oil Properties

A

Viscus=slower than water
Miscible=mix well
Hydrolysis=water breaking something down
Needs to be non flammable
Must handle all temps and pressures

39
Q

Mineral oil

A

Old systems
CFD and HCFC’s

40
Q

AB oil

A

Used with blends with CFC and HCFC systems

41
Q

POE Oil or Ester Oil

A

Used in HFC and HFO systems

42
Q

Equipment Classification

A

Based on pressure in liquid line
High
Med
Low

43
Q

System dependent recovery

A

Uses system compressor. Pressure high to low

44
Q

Self Contained recovery

A

Does not rely on system

45
Q

Process stub or service adaptor

A

Crimped pipe on compressor for CFC or HCFC

46
Q

3 R’s

A

Recover= remove/store
Recycle= clean for reuse. Filter dryer
Reclaim= process and test to new ASHI 700-2016

47
Q

Recovery equipment

A

15lbs or less=system dependant
Over 15lbs=self contained

48
Q

Vacuum Hoses

A

Short as possible
Equal to or greater than pump connections

49
Q

Factors of dehydration time

A

Equipment size
Ambient temp
Amount of moisture
Suction line size

Heat system to speed up

50
Q

Hydrocarbons

A

Ground system

51
Q

Pressure test

A

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
Q

If flammable refrigerant is uses

A

Red marks 1” both directions
Ground equipment

53
Q

High to Very High Refrigerant. MEMORIZE

A

R-22
R-407A
R-407C
R-410A
R-502

54
Q

Max leak rate

A

Also known as Trigger rate or Threshold leak

EPA 608 (1 decks)

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