EPA 608 Flash

Question 1

Under EPA’s regulations, which of the following methods can be used to pressurize a system for the pupose of opening the system for non-major repairs?

Answer 1

Controlled Hot Water

Question 2

For what refrigerant is an equipment room refrigerant sensor required under ASHRAE standard 15?

Answer 2

HCFC-123

Question 3

A low pressure chiller using CFC-11 as refrigerant has been shut down and has an evaporator pressure of 18.1” Hg. What is the corresponding temperature?

Answer 3

32 degrees F

Question 4

In a refrigeration system utilizing a thermal expansion valve, the component directly following the condenser is the:

Answer 4

Evaporator

Question 5

Required level of evacuation for recovery equipment manufactured before November 15, 1993, on a system with a CFC-12 charge of less than 200 pounds is:

Answer 5

0 in. Hg

Question 6

The MOST IMPORTANT reason why you should NEVER heat a refrigeration container of any kind with an open flame is

Answer 6

Internal hydrostatic pressure may cause the tank to explode, causing serious injury or death

Question 7

What is the proper method for charging blended refrigerants?

Answer 7

Charge exact weight of liquid refrigerant into the high side of the system

Question 8

The majority of the liquid to be recovered from a system will be found in the:

Answer 8

Receiver (when applied)

Question 9

System vacuum level is measured with the:

Answer 9

System isolated

Question 10

Recovery of refrigerant from a low-pressure system using the “push-pull” method removes what from the chiller?

Answer 10

Liquid

Question 11

What is the “push-pull” method?

Answer 11

Recovers large amounts of liquid refrigerant by connecting liquid line system to liquid line recovery and suction line system to suction line tank, and a connection then made from the discharge outlet of recovery unit back to the system.

Question 12

State the condition of the refrigerant entering the compressor:

Answer 12

Low-pressure vapor

Question 13

When shipping non-flammable compressed gases, DOT requires which of these items to be recorded on the shipping papers?

Answer 13

Number of cylinders of each gas

Question 14

To work on small appliances after Nov. 14, 1994, technicians must be certified as:

Answer 14

Type I, not Type I and Universal

Question 15

When using a recovery and recycling equipment BEFORE Nov. 15, 1993, techs must evacuate an appliance containing 10 pounds of CFC-500 to the following level before disposal:

Answer 15

4in. Hg Vacuum

Question 16

Since when it has been illegal to knowingly release refrigerants during the service, maintenance, repair or disposal of refrigerated appliances:

Answer 16

1-Jul-92

Question 17

The most common refrigerant used by low-pressure chillers has been CFC-11. The current replacement for CFC-11 is a HCFC, which is:

Answer 17

HCFC-123

Question 18

The what of refrigeration machines having a refrigerant charge of 50lbs or more must keep records of refrigerant added to each machine.

Answer 18

Owners, not technicians

Question 19

EPA defines what as an applieance that uses a refrigerant with a boiling point below -50 degrees C at atmos pressure. This definition includes, but not limited to, equipment utilizing CFC-13, R-503:

Answer 19

Very High-Pressure Appliances

Question 20

The only refrigerant approved by the EPA to be used as a trace gas with nitrogen to test for a leak - except for systems using HFC-134a - is:

Answer 20

HCFC-22

Question 21

What type of refrigerants are R-32, R-125, R-134a, R-143a

Answer 21

HFC

Question 22

What type of refrigerants are R-22, R-123, R-124

Answer 22

HCFC

Question 23

What type of refrigerants are R-11, R-12, R-113, R-114, R-115

Answer 23

CFC

Question 24

What is the difference between classification of high-pressure and low-pressure refrigerants?

Answer 24

Boiling point below 50 degrees F are High Pressure. 50 degrees and above are Low Pressure

Question 25

What is the boiling point of a Very High Pressure Refrigerant?

Answer 25

Very High-Pressure is -50 degrees C

Question 26

When was the 100 percent ban on production of CFC's?

Answer 26

1/1/1996

Question 27

When was the HCFC freeze at baseline consumption?

Answer 27

1/1/1996

Question 28

When are HCFC's being reduced by 35 percent?

Answer 28

1/1/2004

Question 29

When are HCFC's being reducted by 65 percent, only made for old machines?

Answer 29

1/1/2010

Question 30

When are HCFC's being reduced by 90 percent?

Answer 30

1/1/2015

Question 31

What is the significance of 1/1/20?

Answer 31

Reduction of HCFC production by 99.5 percent.

Question 32

When will HCFC be reduced by 100 percent?

Answer 32

1/1/2030

Question 33

When was the Montreal Protocol meeting?

Answer 33

Sep-87

Question 34

When was the CAA Section 608 enacted into law in the U.S.?

Answer 34

1990

Question 35

When was venting of CFC and HCFC's prohibited legally?

Answer 35

July 1, 1992

Question 36

When was venting HFC's made illegal?

Answer 36

November 15, 1995

Question 37

What is the replacement for CFC-12? Is it a drop in?

Answer 37

HFC-134a. No.

Question 38

What is one replacement for HCFC-22? Is it a drop in?

Answer 38

HFC-410A

Question 39

Evacuation standards for machines before and after 11/15/1993 for HCFC-22 or component below 200lb?

Answer 39

0 in. Hg and 0 in. Hg

Question 40

Evacuation standards for machines before and after 11/15/1993 for HCFC-22 or component over 200lb?

Answer 40

4 in. Hg and 10 in. Hg

Question 41

Evacuation standards for machines before and after 11/15/1993 for other high-pressure equipment or component below 200lb?

Answer 41

4 in. Hg and 10 in. Hg

Question 42

Evacuation standards for machines before and after 11/15/1993 for other high-pressure equipment or component over 200lb?

Answer 42

4 in. Hg and 15 in. Hg

Question 43

Evacuation standards for machines before and after 11/15/1993 for very high-pressure equipment?

Answer 43

0 in. Hg and 0 in. Hg

Question 44

Evacuation standards for machines before 11/15/1993 for other low-pressure equipment?

Answer 44

25 in. Hg and 25 mm. Hg

Question 45

What does ASHRAE Guideline 3-1990 state?

Answer 45

If pressure in system increases 1mm Hg to above 2.5mm Hg during vacuum testing, must leak check system

Question 46

What are the most common refrigerants found in chiller rooms today?

Answer 46

CFC-11 orange, HCFC-123 light grey, CFC-113 purple

Question 47

What does ARI-700 require?

Answer 47

Reclaimed refrigerant must be returned to virgin-like state before resale

Question 48

Name Low-Pressure refrigerants:

Answer 48

CFC-11, 113, and HCFC-123

Question 49

Name High-Pressure refrigerants:

Answer 49

CFC-12, 114, 500, 502, and HCFC-22

Question 50

What does ASHRAE 15 require?

Answer 50

Requires oxygen-deprivation sensors and emergency venting in equipment machine rooms for all refrigerants

Question 51

What does ASHRAE 34 describe?

Answer 51

Standards for Flamability and Toxicity of refrigerants

Question 52

An average low-pressure chiller requires about 3 pounds of refrigerant per ton. The large amount of liquid refrigerant involved is removed more quickly:

Answer 52

By a special liquid pump from the evaporator into the recovery vessel

Question 53

HFC-134a is classified as a ________ under ASHRAE 34 safety group.

Answer 53

A1

Question 54

After isolating a portion of the system that is leaking, what pressure must the isolated portion be brought to before starting a major repair?

Answer 54

The lowest attainable level.

Question 55

How many valve are in the centrifugal compressor?

Answer 55

0

Question 56

What will the evaporator temperature of CFC-11 be at vapor pressure of 13.1psig?

Answer 56

110 degrees F

Question 57

At what temperature will CFC-11 be at under a pressure of 13.1 psig?

Answer 57

110 degrees