AIR CONDITIONING AND REFRIGERATION
ACTUAL EXAM 2025 WITH 200+ QUESTIONS
AND VERIFIED CORRECT ANSWERS |
ALREADY GRADED A+ | GUARANTEED PASS |
AIR CONDITIONING AND REFRIGERATION
LATEST VERSION [BRAND NEW EXAM!!]
The ______ is the first component of a refrigeration system that must be
determined since its chemical and physical properties play a large role in selecting
the other components. - ANSWER- refrigeration
The pressure inside a refrigerant cylinder or systems is created by _____. -
ANSWER- vapor.
If all the vapor inside a closed cylinder condenses there is no ______. - ANSWER-
pressure
The boiling temperature of any liquid is controlled by the _____ ______ exerted on
the liquid. - ANSWER- vapor pressure
The pressure and temperature of any saturated liquid tend to __ ___ ___ ___
together - ANSWER- go up and down
PT charts are - ANSWER- Pressure temperature charts.
,They correlate the saturation temperature and pressure of commonly used
refrigerants.
PT charts cannot be used to predict the pressure or temperature of a ____ ___ or a
___ ___. - ANSWER- superheated gas
subcooled liquid
How is superheat calculated using a PT chart? - ANSWER- Compare the saturated
temperature on the chart to the actual refrigerant temperature.
PT charts often provide a more accurate evaporating or condensing temperature
than attempts to measure them directly with a _____. - ANSWER- thermometer
The most common characteristics used to classify refrigerants are: - ANSWER-
Operating pressure
Chemical composition
Formulation
Toxicity
Flammability
Ozone-depletion potential
Global-warming potential
Three classes of refrigerant operating pressure: - ANSWER- Low pressure
High pressure
Very high pressure
, Anything that can boil at a _____ temperature and condense at a _____
temperature can be used as a refrigerant. - ANSWER- boil at a high temperature
condense at a low temperature
Water could be used as a refrigerant if the pressure was adequately _____. -
ANSWER- low.
For example, it boils at 40F if in a vacuum of 29.75in Hg
Refrigerant is: - ANSWER- the fluid in a refrigeration system for transferring heat.
Refrigerants can transfer heat by changing _____ heat or ____ heat. - ANSWER-
sensible
latent
Refrigerants that utilize a change in latent heat are much more ______ than ones
that utilize a change in sensible heat. - ANSWER- efficient
If a sensible heat-based refrigerant were to have a good cooling effect ____
refrigerant would have to be used to compared to a latent refrigerant. - ANSWER-
much more
The refrigerant's temperature is controlled by its _____. - ANSWER- pressure
Lower pressures yield ____ temperatures. - ANSWER- lower
CO2 will not condense at temperatures above ___F because the temperature and
pressure in the high side exceed the critical point. - ANSWER- 88
ACTUAL EXAM 2025 WITH 200+ QUESTIONS
AND VERIFIED CORRECT ANSWERS |
ALREADY GRADED A+ | GUARANTEED PASS |
AIR CONDITIONING AND REFRIGERATION
LATEST VERSION [BRAND NEW EXAM!!]
The ______ is the first component of a refrigeration system that must be
determined since its chemical and physical properties play a large role in selecting
the other components. - ANSWER- refrigeration
The pressure inside a refrigerant cylinder or systems is created by _____. -
ANSWER- vapor.
If all the vapor inside a closed cylinder condenses there is no ______. - ANSWER-
pressure
The boiling temperature of any liquid is controlled by the _____ ______ exerted on
the liquid. - ANSWER- vapor pressure
The pressure and temperature of any saturated liquid tend to __ ___ ___ ___
together - ANSWER- go up and down
PT charts are - ANSWER- Pressure temperature charts.
,They correlate the saturation temperature and pressure of commonly used
refrigerants.
PT charts cannot be used to predict the pressure or temperature of a ____ ___ or a
___ ___. - ANSWER- superheated gas
subcooled liquid
How is superheat calculated using a PT chart? - ANSWER- Compare the saturated
temperature on the chart to the actual refrigerant temperature.
PT charts often provide a more accurate evaporating or condensing temperature
than attempts to measure them directly with a _____. - ANSWER- thermometer
The most common characteristics used to classify refrigerants are: - ANSWER-
Operating pressure
Chemical composition
Formulation
Toxicity
Flammability
Ozone-depletion potential
Global-warming potential
Three classes of refrigerant operating pressure: - ANSWER- Low pressure
High pressure
Very high pressure
, Anything that can boil at a _____ temperature and condense at a _____
temperature can be used as a refrigerant. - ANSWER- boil at a high temperature
condense at a low temperature
Water could be used as a refrigerant if the pressure was adequately _____. -
ANSWER- low.
For example, it boils at 40F if in a vacuum of 29.75in Hg
Refrigerant is: - ANSWER- the fluid in a refrigeration system for transferring heat.
Refrigerants can transfer heat by changing _____ heat or ____ heat. - ANSWER-
sensible
latent
Refrigerants that utilize a change in latent heat are much more ______ than ones
that utilize a change in sensible heat. - ANSWER- efficient
If a sensible heat-based refrigerant were to have a good cooling effect ____
refrigerant would have to be used to compared to a latent refrigerant. - ANSWER-
much more
The refrigerant's temperature is controlled by its _____. - ANSWER- pressure
Lower pressures yield ____ temperatures. - ANSWER- lower
CO2 will not condense at temperatures above ___F because the temperature and
pressure in the high side exceed the critical point. - ANSWER- 88
