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Hvac > EPA Test Prep 2- Core > Flashcards

EPA Test Prep 2- Core Flashcards

1
Q

Ozone in the stratosphere above the earth consists of:
A. molecules containing 3 oxygen atoms
B. Molecules of 2 oxygen atoms
C. Radioactive particles
D. Pollutants that have risen from ground level

A

A. molecules containing 3 oxygen atoms

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2
Q

Each chlorine atom in the stratosphere can destroy ________ ozone molecules.
A. 1
B. 3
C. 100,000
D. Chlorine is not the element in refrigerant that harms ozone

A

C. 100,000

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3
Q 
Which atom of the molecule causes ozone depletion? 
A. Fluorine 
B. Chlorine 
C. Carbon
D. Hydrogen
A

B. Chlorine

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4
Q 
Ozone depletion in the stratosphere is what type of problem? 
A. Local 
B. Regional
C. National
D. Global
A

D. Global

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5
Q

What characteristics of CFCs make them more likely to reach the stratosphere than most other compounds containing Chlorine?
A. CFCs neither dissolve in water nor breakdown into compounds that dissolve in water, so they do not rain out of the atmosphere
B. CFCs are lighter than other chlorine compounds, making it easier for them to float upward when released
C. CFCs are stored under pressure, causing them to jet upward when released
D. CFCs are attracted to ultraviolet radiation

A

A. CFCs neither dissolve in water nor breakdown into compounds that dissolve in water, so they do not rain out of the atmosphere

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6
Q 
Which of the following gases help form the earths protective shield? 
A. Methane
B. Radon
C. Stratospheric ozone 
D. Carbon dioxide
A

C. Stratospheric ozone

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7
Q 
Which type of refrigerant is the most harmful to stratospheric ozone? 
A. CFC
B. HCVC
C. HFC
D. Ammonia
A

A. CFC

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8
Q

What is being done in the U.S. to stop damage to the stratospheric ozone layer?
A. Using natural gas instead of coal to generate electricity
B. Capturing and ultimately eliminating the use of chlorofluorocarbons
C. Enforcing strict emission requirements on incinerators
D. All of the above

A

B. Capturing and ultimately eliminating the use of chlorofluorocarbons

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9
Q

Which of the following is/are violations of the clean air act?
A. Falsifying or failing to keep required records
B. Failing to reach required evacuation levels before opening or disposing of appliances
C. Knowingly release CFC or HCFC refrigerants or their substitutes while repairing appliances
D. All of the above

A

D. All of the above

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10
Q

Some state and local governments may establish laws that:
A. Follow the clean air act/ EPA regulations
B. Are not as strict as the clean air act/ EPA regulations
C. Contain stricter regulations than the clean air act / EPA regulations
D. Both A and C

A

D. Both A and C

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11
Q

Before you dispose of any appliance containing CFC or HCFC refrigerant, you must:
A. Recover the refrigerant
B. Purge the appliance with nitrogen
C. Flush the appliance with R11
D. Seal the appliance so no refrigerant can escape

A

A. Recover the refrigerant

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12
Q

Service technicians who violate clean air act provisions:
A. May be fined
B. May loose certification
C. May be required to appear in federal court
D. All of the above

A

D. All of the above

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13
Q 
An award of up to what amount may be paid to a person applying information that leads to a penalty against a technician who is intentionally venting?
A. 5,000
B. 10,000
C. 25,000
D. 50,000
A

B. 10,000

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14
Q

Service technicians who violate the clean air act provisions:
A. May be fined
B. May loose certification
C. May be required to appear in federal court
D. All of the above

A

D. All of the above

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15
Q

Blended refrigerants leak from a system:
A. At a faster rate than other refrigerants
B. At uneven rates due to different vapor pressures
C. At a slower rate than other refrigerants
D. Only if the line breaks completely

A

B. At uneven rates due to different vapor pressures

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16
Q 
R134a refrigerant charged systems should be leak checked with: 
A. CFCs 
B. HCFCs
C. Pressurized nitrogen
D. Compressed dry air
A

C. Pressurized nitrogen

17
Q 
The state of the refrigerant leaving the condenser of a refrigeration system is:
A. Low pressure liquid 
B. Low pressure vapor 
C. High pressure liquid 
D. High pressure vapor
A

C. High pressure liquid

18
Q 
Refrigerant entering the compressor of a refrigeration system is a:
A. Liquid 
B. Sub-cooled liquid 
C. Sub-cooled vapor
D. Superheated vapor
A

D. Superheated vapor

19
Q 
Which process applies to cleaning refrigerant for immediate reuse by oil separation and single or multiple passes through devices, like replaceable core filters dries, which release moisture and acidity?
A. Recycling 
B. Recovering
C. Reclaiming 
D. Restoring
A

A. Recycling

20
Q 
Which of the following leak detection methods is considered to be the most effective for locating the general area of a small leak?
A. Standing vacuum test 
B. Electronic or ultrasonic tester
C. Halide torch 
D. Audible sound
A

B. Electronic or ultrasonic tester

21
Q 
Recovery during low ambient temperature will: 
A. Shorten recovery time
B. Slow the recovery process 
C. Minimize emissions 
D. Require frequent drier changes
A

B. Slow the recovery process

22
Q

Factors affecting the speed of evacuation include:
A. The size of equipment being evacuated
B. The ambient temperature
C. The amount of moisture in the system
D. All of the above

A

D. All of the above

23
Q

One instance when personal equipment ( gloves, safety glasses, safety shoes, etc.) should be worn is when:
A. Reporting for work
B. Handling and filling refrigerant cylinders
C. Climbing ladders
D. Lifting

A

B. Handling and filling refrigerant cylinders

24
Q 
When pressurizing a refrigeration system with nitrogen what rule should you always follow? 
A. Charge the nitrogen as a liquid
B. Charge through a pressure regulator 
C. Pressurize to above 1000 pounds 
D. Never use nitrogen inside the system
A

B. Charge through a pressure regulator

25
Q 
When transporting cylinders containing used refrigerant, 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
A

B. Attach DOT classification tags

Hvac (18 decks)

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