Refrigeration Exam with 100%
Correct Answers
Which of the following contributes most to global warming? - Answer- Carbon Dioxide
(CO2)
The United States banned the use of CFCs in nonessential aerosols in
_______________. - Answer- 1978
An example of a non-essential aerosol is _______________. - Answer- Asthma inhalant
spray
The Clean Air Act (CAA) Amendment was signed into law by the President of the United
States on _______________. - Answer- November 15, 1990
A low-pressure appliance is one that uses refrigerant that boils _______________ at
atmospheric pressure. - Answer- Above 50*F
Universal certification, one must be certified in _______________. - Answer- Types I, II,
and III.
Leak repairs are required of comfort cooling chillers having an annual leak rate of
_______________. - Answer- 15%
A single violation of regulations, under Title VII, can result in daily fines up to
_______________. - Answer- $27,500
Those who report violators under Title VII may get awards up to _______________. -
Answer- $10,000
Passive refrigerant recovery requires _______________. - Answer- a functioning
compressor
What determines the time required for refrigerant recovery from a system? - Answer-
Refrigerant type and recovery method
A major repair includes the replacement of _______________. - Answer- a condenser
coil
, A minor repair would be to _______________. - Answer- replace the condenser fan
motor and add refrigerant to the system.
When recovering refrigerant from a small appliance with a non-operating compressor,
how much of the refrigerant must be removed? - Answer- 80%
A small appliance is one that contains less than _______________ pound(s) of
refrigerant. - Answer- 5
Hard silver solder is best when connecting _______________. - Answer- Steal to brass
or copper, or copper to brass
The pressure of a fully charged nitrogen cylinder is about _______________. - Answer-
2000 psig
There should be a pressure relief valve downstream of a nitrogen regulator at no
greater than _______________. - Answer- 150 psig
Which of the following is not true of an HFC refrigerant? - Answer- They have low global
warming potentials.
Which of the following is not true of a refrigerant blend? - Answer- HFC blends are
short-term replacements for CFC and HCFC refrigerants.
Stratospheric Ozone Depletion - Answer- Global Problem
The condition and state of refrigerant as it enters the condenser of an air-conditioning
system - Answer- Superheated Vapor
What determines the time required to properly evacuate and dehydrate a system prior
to charging with refrigerant? - Answer- -The total volume of the system.
-The amount on noncondensables in the system.
-The ambient temperature surrounding the system.
What is the condition and state of the refrigerant as it leaves a receiver? - Answer-
Subcooled Liquid
How are refrigerant cylinders shipped? - Answer- Upright
Which refrigerant contains the greatest amount of chlorine? - Answer- CFC's
When did it become unlawful to intentionally release Class I and Class II refrigerants
into the atmosphere? - Answer- July 1, 1992
Correct Answers
Which of the following contributes most to global warming? - Answer- Carbon Dioxide
(CO2)
The United States banned the use of CFCs in nonessential aerosols in
_______________. - Answer- 1978
An example of a non-essential aerosol is _______________. - Answer- Asthma inhalant
spray
The Clean Air Act (CAA) Amendment was signed into law by the President of the United
States on _______________. - Answer- November 15, 1990
A low-pressure appliance is one that uses refrigerant that boils _______________ at
atmospheric pressure. - Answer- Above 50*F
Universal certification, one must be certified in _______________. - Answer- Types I, II,
and III.
Leak repairs are required of comfort cooling chillers having an annual leak rate of
_______________. - Answer- 15%
A single violation of regulations, under Title VII, can result in daily fines up to
_______________. - Answer- $27,500
Those who report violators under Title VII may get awards up to _______________. -
Answer- $10,000
Passive refrigerant recovery requires _______________. - Answer- a functioning
compressor
What determines the time required for refrigerant recovery from a system? - Answer-
Refrigerant type and recovery method
A major repair includes the replacement of _______________. - Answer- a condenser
coil
, A minor repair would be to _______________. - Answer- replace the condenser fan
motor and add refrigerant to the system.
When recovering refrigerant from a small appliance with a non-operating compressor,
how much of the refrigerant must be removed? - Answer- 80%
A small appliance is one that contains less than _______________ pound(s) of
refrigerant. - Answer- 5
Hard silver solder is best when connecting _______________. - Answer- Steal to brass
or copper, or copper to brass
The pressure of a fully charged nitrogen cylinder is about _______________. - Answer-
2000 psig
There should be a pressure relief valve downstream of a nitrogen regulator at no
greater than _______________. - Answer- 150 psig
Which of the following is not true of an HFC refrigerant? - Answer- They have low global
warming potentials.
Which of the following is not true of a refrigerant blend? - Answer- HFC blends are
short-term replacements for CFC and HCFC refrigerants.
Stratospheric Ozone Depletion - Answer- Global Problem
The condition and state of refrigerant as it enters the condenser of an air-conditioning
system - Answer- Superheated Vapor
What determines the time required to properly evacuate and dehydrate a system prior
to charging with refrigerant? - Answer- -The total volume of the system.
-The amount on noncondensables in the system.
-The ambient temperature surrounding the system.
What is the condition and state of the refrigerant as it leaves a receiver? - Answer-
Subcooled Liquid
How are refrigerant cylinders shipped? - Answer- Upright
Which refrigerant contains the greatest amount of chlorine? - Answer- CFC's
When did it become unlawful to intentionally release Class I and Class II refrigerants
into the atmosphere? - Answer- July 1, 1992
