EPA 608 Core Flashcards Preview

HVAC > EPA 608 Core > Flashcards

Flashcards in EPA 608 Core Deck (21)
Loading flashcards...
1

To determine the maximum allowable pressure to use when checking a system, check:
A) With the equipment owner
B) with the refrigerant pressure/ temperature tables
C) the design pressure on the equipment nameplate
D) ask the local utility company

C) the design pressure on the equipment nameplate

2

An example of an HFC refrigerant is:
A) R-410A.
B) R-115.
C) R-22.
D) R-11.

A) R-410A

3

_______ refers to the process of cleaning refrigerant by oil separation and single or multiple passes through filter-driers, which reduce moisture and acidity?
A) recycling
B) recovering
C) reclaiming
D) restoring

A) recycling

4

A compound pressure gauge, typically used on the low side of the system, measures pressure in:
A) psia
B) torrs and microns
C) psig and inches of mercury
D) psia and microns

C) msig and inches of mercury

5

A refillable refrigerant cylinder must never be filled to more than ______ of its capacity by weight:
A) 70%
B) 80%
C) 90%
D) 95%

B) 80%

6

Ozone depletion in the stratosphere is what type of problem?
A) American
B) Third World
C) National
D) Global

D) Global

7

The EPA requires the installation of a service aperture or process stub on all appliances using a class I or class II substance as a refrigerant. The main purpose of this requirement is to make it easier to:
A) recover refrigerant.
B) change the compressor lubrication.
C) vent non-condensables.
D) dehydrate the system

A) recover refrigerant

8

Reusable refrigerant containers that are normally under any pressure above psig, must be hydrostatically tested and date stamped every:
A) 1 year
B) 2 years
C) 3 years
D) 5 years

D) 5 years

9

What is one of the most serious results of damage to the ozone layer?
A) mutation of marine plants
B) increased volcanic activity
C) increases in human skin cancer
D) higher natural background radioactivity

C) increases in human skin cancer

10

Of the refrigerants listed below, which types of refrigerants will not damage stratospheric ozone?
A) CFC's
B) HCFC's
C) HFC's
D) They all damage the ozone

C) HFC's

11

Of the refrigerants listed below, which refrigerant type have the highest ozone depletion potential?
A) HCFC's
B) HFC's
C) CFC's
D) All are equal

C) CFC's

12

Ester based oils can be mixed with:
A) no other oils
B) paraffinic mineral oils only.
C) alkylbenzene oils only.
D) mineral oils.

A) No other oils.

13

Under EPA's regulations, what standard must reclaimed refrigerant meet before it can be resold?
A) ARI 700
B) ARI 740
C) EPA 700
D) UL 740

A) ARI 700

14

A cylinder with a gray body and a yellow top indicates that the cylinder is designed to hold:
A) Nitrogen
B) inert gas
C) only R-12
D) recovered refrigerant

D) Recovered refrigerant

15

What effects can ozone depletion have on the environment?
A) reduced crop yields
B) reduced marine life
C) increased ground-level ozone
D) all of the above

D) All of the above

16

Manifold gauge sets are often color coded, when this is done, the high pressure gauge is color coded:
A) red.
B) white.
C) blue.
D) yellow.

A) red.

17

Chlorofluorocarbons (CFCs) and hydrofluorocarbons (HCFCs) have which of the following in common?
A) They have identical ODP's.
B) They both contain hydrogen.
C) They have the same normal boiling points.
D) They must be recovered before opening or disposing of appliances.

D) They must be recovered before opening or disposing of appliances.

18

Refrigerant that enters the compressor, under normal operating conditions, is a:
A) low pressure vapor.
B) low pressure liquid.
C) high pressure liquid.
D) high pressure vapor.

A) low pressure vapor.

19

What characteristic(s) of CFCs make them more likely to reach the stratosphere than most other compounds containing chlorine?
A) Refrigerants that contain chlorine but not hydrogen are so stable that they do not break down in the lower atmosphere after being released. The chlorine of bromine reacts with ozone, causing it to change back to oxygen, thus destroying the ozone layer.
B) CFCs are lighter than other damaging compounds, making it easier for them to float upward when released.
C) CFCs are attracted to the static in the atmosphere
D) CFCs are attracted to dust in the atmosphere

A) Refrigerants that contain chlorine but not hydrogen are so stable that they do not break down in the lower atmosphere after being released. The chlorine of bromine reacts with ozone, causing it to change back to oxygen, thus destroying the ozone layer.

20

When transporting cylinders containing used refrigerant, the DOT requires that you:
A) use OSHA-approved containers.
B) attach DOT classification tags.
C) ship by EPA certified carrier
D) do all of the above.

B) attach DOT classification tags.

21

R-410 is not a typical blended refrigerant because:
A) It is a near azeotropic refrigerant
B) It can be charged as either a liquid or vapor.
C) While it has a 400 series refrigerant number it behaves like a 500 series refrigerant.
D) All of the above

D) All of the above