EPA (Full)
Which of the following gases helps form the earth's protective shield?
A. Methane
B. Radon
C. Stratospheric
D. Carbon dioxide - answerC
An example of an HFC refrigerant is:
A. R-134a
B. R-115
C. R-22
D. R-11 - answerA
Hydrofluorocarbon (HFC) refrigerants contain:
A. Chlorine, Fluorine, and Carbon
B. Chlorine, Fluorine, and Hydrogen
C. Hydrogen, Chlorine, and Carbon
D. Hydrogen, Fluorine, and Carbon - answerD
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 break down into components 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 - answerA
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 - answerD
What is the strongest evidence that CFCs are in the stratosphere?
A. Theory only
B. Measurement of CFCs in air samples from the lower stratosphere
C. Measurement of CFCs in air samples from the stratosphere
D. Measurement of other man-made compounds in air samples from the stratosphere -
answerC
,Which compounds have the highest ozone depletion potential?
A. HCFCs
B. HFCs
C. CFCs
D. All are equal - answerC
Service technicians who violate Clean air act provisions:
A. May be fined
B. May lose certification
C. May be required to appear in federal court
D. All of the above - answerD
EPA may require technicians to demonstrate their ability to perform proper procedures
for recovering and/or recycling refrigerant. Failure to demonstrate or failure to properly
use the equipment may result in:
A. Revocation of the technicians certification
B. Impoundment of recovery equipment
C. Seizure of refrigerant purchased by the technician
D. Mandatory attendance of refrigerant camp - answerA
What is being done in the US to stop damage to the stratosphere ozone layer?
A. Using natural gas instead of coal to generate electricity
B. Capturing and ultimately eliminating use of Chlorofluorocarbons
C. Enforcing strict emission requirements on incinerators
D. All of the above - answerD
All devices used for refrigerant recovery must:
A. Be portable
B. Contain a heavy duty shield
C. Have a 20,000 btu/hr rating
D. Meet EPA standards - answerD
Before you dispose of any appliance containing CFC or HCFC refrigerant you must:
A. Recover refrigerant
B. Purge the appliance with nitrogen
C. Flush the application with R-11
D. Seal the appliance so no refrigerant can escape - answerA
After 1995 supplies of CFC refrigerant for equipment servicing will come from:
A. Recovery and recycling
B. Solvent conversion
C. European chemical manufacturers
D. Third world chemical manufacturers - answerA
,EPA regulations require the installation of a service aperture or process stub on all
appliances using a class 1 or class 2 substance as a refrigerant. The main purpose of
this requirement is to make it easier to:
A. Recover refrigerant
B. Check for open motor windings
C. Vent non-condensables
D. Dehydrate the system - answerA
Which of the following is an "approved" drop in service replacement for R-12?
A. HFC-134a
B. HFC-125
C. CFC-502
D. None of the above - answerD
Ester based oils can be mixed with:
A. Pag oils
B. Paraffinic mineral oils
C. Alkylbenzene oils
D. No other oils - answerD
The center port on a three port manifold is:
A. Obtaining gauge readings
B. Pumping air into system
C. by-pass from low to high
D. Recovery, evacuation, and charging - answerD
Manufacturers often color code the exterior of gauges. On a typical gauge manifold set
the low pressure gauge is colored coded:
A. Green
B. Yellow
C. Blue
D. Red - answerC
Which process applies to cleaning refrigerant for immediate reuse by oil separation and
single/multiple passes through devices like replaceable core filter-driers which reduce
moisture and acidity?
A. Recycling
B. Recovering
C. Reclaiming
D. Restoring - answerA
If a system cannot hold a vacuum after it has been evacuated then:
A. The system is ready to be charged
B. The system has been adequately evacuated
C. The system may be leaking
D. An expansion valve is clogged - answerC
, When recovering refrigerant it is important not to mix different refrigerants in the same
container because:
A. The mixture would explode
B. The mixture may be impossible to reclaim
C. The refrigerant mixture is toxic
D. It is a violation of EPA environment regulations - answerB
Evacuation of a system is a suggested method of:
A. Pinpointing leaks
B. Acid removal
C. Dehydration
D. All of the above - answerC
Approved refrigerant recovery cylinders can be identified by which color code?
A. Grey tops and yellow bodies
B. Blue tops and green bodies
C. Yellow top and grey bodies
D. Green top and grey bodies - answerC
One should NEVER heat a refrigerant storage or recovery tank with an open flame
because:
A. It can result in venting refrigerant into the atmosphere
B. The tank may explode causing serious injury to people nearby
C. Refrigerant in the tank may decompose forming toxic material
D. All of the above - answerD
A refrigerant label is placed on a:
A. Refrigerant cylinder to be returned for reclaiming
B. Truck to identify cylinder hauler
C. Cylinder to identify gross weight
D. Cylinder to identify pressure - answerA
Any person who opens an appliance for maintenance or repair must have at least one
self-contained recovery machine available at their place of business. The exceptions to
this rule are technicians working on:
A. Small appliances
B. Low pressure appliances
C. High pressure appliances
D. Very high pressure appliances - answerA
Which of the following is not a type 1 appliance?
A. An MVAC-like system that holds 3 pounds of R-12
B. A water cooler than holds 13 ounces of R-12
C. A food freezer that holds 22 ounces of R-22
D. Dehumidifier with 7 ounces of R-500 - answerA
Which of the following gases helps form the earth's protective shield?
A. Methane
B. Radon
C. Stratospheric
D. Carbon dioxide - answerC
An example of an HFC refrigerant is:
A. R-134a
B. R-115
C. R-22
D. R-11 - answerA
Hydrofluorocarbon (HFC) refrigerants contain:
A. Chlorine, Fluorine, and Carbon
B. Chlorine, Fluorine, and Hydrogen
C. Hydrogen, Chlorine, and Carbon
D. Hydrogen, Fluorine, and Carbon - answerD
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 break down into components 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 - answerA
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 - answerD
What is the strongest evidence that CFCs are in the stratosphere?
A. Theory only
B. Measurement of CFCs in air samples from the lower stratosphere
C. Measurement of CFCs in air samples from the stratosphere
D. Measurement of other man-made compounds in air samples from the stratosphere -
answerC
,Which compounds have the highest ozone depletion potential?
A. HCFCs
B. HFCs
C. CFCs
D. All are equal - answerC
Service technicians who violate Clean air act provisions:
A. May be fined
B. May lose certification
C. May be required to appear in federal court
D. All of the above - answerD
EPA may require technicians to demonstrate their ability to perform proper procedures
for recovering and/or recycling refrigerant. Failure to demonstrate or failure to properly
use the equipment may result in:
A. Revocation of the technicians certification
B. Impoundment of recovery equipment
C. Seizure of refrigerant purchased by the technician
D. Mandatory attendance of refrigerant camp - answerA
What is being done in the US to stop damage to the stratosphere ozone layer?
A. Using natural gas instead of coal to generate electricity
B. Capturing and ultimately eliminating use of Chlorofluorocarbons
C. Enforcing strict emission requirements on incinerators
D. All of the above - answerD
All devices used for refrigerant recovery must:
A. Be portable
B. Contain a heavy duty shield
C. Have a 20,000 btu/hr rating
D. Meet EPA standards - answerD
Before you dispose of any appliance containing CFC or HCFC refrigerant you must:
A. Recover refrigerant
B. Purge the appliance with nitrogen
C. Flush the application with R-11
D. Seal the appliance so no refrigerant can escape - answerA
After 1995 supplies of CFC refrigerant for equipment servicing will come from:
A. Recovery and recycling
B. Solvent conversion
C. European chemical manufacturers
D. Third world chemical manufacturers - answerA
,EPA regulations require the installation of a service aperture or process stub on all
appliances using a class 1 or class 2 substance as a refrigerant. The main purpose of
this requirement is to make it easier to:
A. Recover refrigerant
B. Check for open motor windings
C. Vent non-condensables
D. Dehydrate the system - answerA
Which of the following is an "approved" drop in service replacement for R-12?
A. HFC-134a
B. HFC-125
C. CFC-502
D. None of the above - answerD
Ester based oils can be mixed with:
A. Pag oils
B. Paraffinic mineral oils
C. Alkylbenzene oils
D. No other oils - answerD
The center port on a three port manifold is:
A. Obtaining gauge readings
B. Pumping air into system
C. by-pass from low to high
D. Recovery, evacuation, and charging - answerD
Manufacturers often color code the exterior of gauges. On a typical gauge manifold set
the low pressure gauge is colored coded:
A. Green
B. Yellow
C. Blue
D. Red - answerC
Which process applies to cleaning refrigerant for immediate reuse by oil separation and
single/multiple passes through devices like replaceable core filter-driers which reduce
moisture and acidity?
A. Recycling
B. Recovering
C. Reclaiming
D. Restoring - answerA
If a system cannot hold a vacuum after it has been evacuated then:
A. The system is ready to be charged
B. The system has been adequately evacuated
C. The system may be leaking
D. An expansion valve is clogged - answerC
, When recovering refrigerant it is important not to mix different refrigerants in the same
container because:
A. The mixture would explode
B. The mixture may be impossible to reclaim
C. The refrigerant mixture is toxic
D. It is a violation of EPA environment regulations - answerB
Evacuation of a system is a suggested method of:
A. Pinpointing leaks
B. Acid removal
C. Dehydration
D. All of the above - answerC
Approved refrigerant recovery cylinders can be identified by which color code?
A. Grey tops and yellow bodies
B. Blue tops and green bodies
C. Yellow top and grey bodies
D. Green top and grey bodies - answerC
One should NEVER heat a refrigerant storage or recovery tank with an open flame
because:
A. It can result in venting refrigerant into the atmosphere
B. The tank may explode causing serious injury to people nearby
C. Refrigerant in the tank may decompose forming toxic material
D. All of the above - answerD
A refrigerant label is placed on a:
A. Refrigerant cylinder to be returned for reclaiming
B. Truck to identify cylinder hauler
C. Cylinder to identify gross weight
D. Cylinder to identify pressure - answerA
Any person who opens an appliance for maintenance or repair must have at least one
self-contained recovery machine available at their place of business. The exceptions to
this rule are technicians working on:
A. Small appliances
B. Low pressure appliances
C. High pressure appliances
D. Very high pressure appliances - answerA
Which of the following is not a type 1 appliance?
A. An MVAC-like system that holds 3 pounds of R-12
B. A water cooler than holds 13 ounces of R-12
C. A food freezer that holds 22 ounces of R-22
D. Dehumidifier with 7 ounces of R-500 - answerA
