CIRO: Exam-Industrial Refrigeration
Final Test Questions and All Actual
Answers.
As defined in chapter 1 of this text the primary purpose of refrigeration system is - Answer To
maintain a temperature
Operators must keep refrigeration systems operating safely and efficiently. Which of the
following best describes the areas of required knowledge for this to be possible. - Answer
Basic physical principles, Interpreparation of information from temperature and pressure
gauges. Basic operating principles.
Mechanical refrigeration is a series of steps that - Answer moves heat energy from the space
or object to an area where It can do no harm.
Heat energy always flows - Answer From an object at a higher temperature to an object at a
lower temperature
sensible heat - Answer Is heat energy that causes a change in temperature but does not
cause a change of state
Latent heat - Answer Is heat energy that causes a change of state but does not cause a
change in temperature
Which of the answers below is an example of heat transfer by convection - Answer Warm air
moving over an object
How does the refrigeration technician/operator know what the conditions are within the
refrigeration system - Answer By using his knowledge of system basic operating principles to
evaluate temperature and pressure readings
How was cooling accomplished by mechanical refrigeration system - Answer By removing
heat energy from one object or area
Which of the following is used to measure the quality of heat energy - Answer British thermal
units BTUs or calories.
Which of the following are used in heat calculations - Answer Mass, latent heat, temperature,
specific heat.
,Latent heat of vaporization - Answer Is the heat energy required to cause a liquid to become
a vapor
Pressure is A measure of - Answer The relationship of a force being applied over a given area
The relationship between temperature difference in heat flow is - Answer The greater the
temperature difference the more rapid the heat flows
Specific heat - Answer Is greater as a substance requires more heat energy to increase
temperature
Temperature is a measure of - Answer The intensity of heat energy in an object
Which of the answers below is an example of heat transferred by conduction - Answer A rod
heated on one end and becoming warm at the other end.
Which are the two most common forms of heat transfer in refrigeration - Answer Conduction
and convection
The condition of a boiling liquid is - Answer Saturated
A vapor cannot be - Answer Subcooled
What kind of measure is a ton of refrigeration - Answer A rate of heat transferred in BTUs per
unit of time
The condition of a liquid that exist at a temperature below its boiling point is - Answer Sub
cooled
Which does the refrigerant in the condenser change State from vapor to a liquid - Answer
The refrigerant loses heat energy to the sub rounding environment
The expansion valve controls only one of its items below which is it - Answer The flow of
liquid into the evaporator
Flash gas is - Answer Only the gas created at the expansion device
, Which is a example of pressure drop - Answer The loss of pressure as a fluid moves down the
pipe due to the interaction of the fluid in the inner walls of the pipe
Refrigerant absorbs the most heat when - Answer Changing from a liquid to a vapor
The latent heat of condensation of a substance is exactly the same quality as - Answer The
latent heat of evaporation of the substance
Saturated conditions exist - Answer At some point within an evaporator and condenser
Flash gas - Answer Is formed after the point of expansion
The four necessary components of a mechanical refrigeration system are - Answer Expansion
device, evaporator, compressor, condenser
A conventional mechanical refrigeration system is considered - Answer A closed loop system
Super heat is found at which point of a typical system - Answer The compressor suction and
compressor discharge line
In an operating ammonia refrigeration system, subcooled refrigerant can only be a - Answer
Liquid
Superheated refrigerant can only be a - Answer Vapor
Saturated refrigerant can - Answer Be a liquid, vapor or a combination of the two
What is needed to get a fluid to flow - Answer A pressure difference
What is one advantage to having evaporator pressures higher than atmospheric pressure -
Answer Higher pressures keep air out of the system
R 507 is a/an - Answer Azeotrope
what do you multiply times the mass flow rate to determine the vapor flow rate through the
compressor - Answer Specific volume cubic feet/lb
Final Test Questions and All Actual
Answers.
As defined in chapter 1 of this text the primary purpose of refrigeration system is - Answer To
maintain a temperature
Operators must keep refrigeration systems operating safely and efficiently. Which of the
following best describes the areas of required knowledge for this to be possible. - Answer
Basic physical principles, Interpreparation of information from temperature and pressure
gauges. Basic operating principles.
Mechanical refrigeration is a series of steps that - Answer moves heat energy from the space
or object to an area where It can do no harm.
Heat energy always flows - Answer From an object at a higher temperature to an object at a
lower temperature
sensible heat - Answer Is heat energy that causes a change in temperature but does not
cause a change of state
Latent heat - Answer Is heat energy that causes a change of state but does not cause a
change in temperature
Which of the answers below is an example of heat transfer by convection - Answer Warm air
moving over an object
How does the refrigeration technician/operator know what the conditions are within the
refrigeration system - Answer By using his knowledge of system basic operating principles to
evaluate temperature and pressure readings
How was cooling accomplished by mechanical refrigeration system - Answer By removing
heat energy from one object or area
Which of the following is used to measure the quality of heat energy - Answer British thermal
units BTUs or calories.
Which of the following are used in heat calculations - Answer Mass, latent heat, temperature,
specific heat.
,Latent heat of vaporization - Answer Is the heat energy required to cause a liquid to become
a vapor
Pressure is A measure of - Answer The relationship of a force being applied over a given area
The relationship between temperature difference in heat flow is - Answer The greater the
temperature difference the more rapid the heat flows
Specific heat - Answer Is greater as a substance requires more heat energy to increase
temperature
Temperature is a measure of - Answer The intensity of heat energy in an object
Which of the answers below is an example of heat transferred by conduction - Answer A rod
heated on one end and becoming warm at the other end.
Which are the two most common forms of heat transfer in refrigeration - Answer Conduction
and convection
The condition of a boiling liquid is - Answer Saturated
A vapor cannot be - Answer Subcooled
What kind of measure is a ton of refrigeration - Answer A rate of heat transferred in BTUs per
unit of time
The condition of a liquid that exist at a temperature below its boiling point is - Answer Sub
cooled
Which does the refrigerant in the condenser change State from vapor to a liquid - Answer
The refrigerant loses heat energy to the sub rounding environment
The expansion valve controls only one of its items below which is it - Answer The flow of
liquid into the evaporator
Flash gas is - Answer Only the gas created at the expansion device
, Which is a example of pressure drop - Answer The loss of pressure as a fluid moves down the
pipe due to the interaction of the fluid in the inner walls of the pipe
Refrigerant absorbs the most heat when - Answer Changing from a liquid to a vapor
The latent heat of condensation of a substance is exactly the same quality as - Answer The
latent heat of evaporation of the substance
Saturated conditions exist - Answer At some point within an evaporator and condenser
Flash gas - Answer Is formed after the point of expansion
The four necessary components of a mechanical refrigeration system are - Answer Expansion
device, evaporator, compressor, condenser
A conventional mechanical refrigeration system is considered - Answer A closed loop system
Super heat is found at which point of a typical system - Answer The compressor suction and
compressor discharge line
In an operating ammonia refrigeration system, subcooled refrigerant can only be a - Answer
Liquid
Superheated refrigerant can only be a - Answer Vapor
Saturated refrigerant can - Answer Be a liquid, vapor or a combination of the two
What is needed to get a fluid to flow - Answer A pressure difference
What is one advantage to having evaporator pressures higher than atmospheric pressure -
Answer Higher pressures keep air out of the system
R 507 is a/an - Answer Azeotrope
what do you multiply times the mass flow rate to determine the vapor flow rate through the
compressor - Answer Specific volume cubic feet/lb
