2
Industrial Refrigeration Exam with verified detailed answers || || || || || ||
As defined in chapter 1 of this text the primary purpose of refrigeration system is - ✔✔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. - ✔✔Basic
|| || || || || || || || || || || || || || ||
physical principles, Interpreparation of information from temperature and pressure gauges.
|| || || || || || || || || ||
Basic operating principles.
|| ||
Mechanical refrigeration is a series of steps that - ✔✔moves heat energy from the space or
|| || || || || || || || || || || || || || || ||
object to an area where It can do no harm.
|| || || || || || || || ||
Heat energy always flows - ✔✔From an object at a higher temperature to an object at a
|| || || || || || || || || || || || || || || || ||
lower temperature||
sensible heat - ✔✔Is heat energy that causes a change in temperature but does not cause a
|| || || || || || || || || || || || || || || ||
change of state
|| || ||
Latent heat - ✔✔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 - ✔✔Warm air
|| || || || || || || || || || || || || || || ||
moving over an object || || ||
How does the refrigeration technician/operator know what the conditions are within the
|| || || || || || || || || || || ||
refrigeration system - ✔✔By using his knowledge of system basic operating principles to
|| || || || || || || || || || || || ||
evaluate temperature and pressure readings
|| || || ||
,2
How was cooling accomplished by mechanical refrigeration system - ✔✔By removing heat
|| || || || || || || || || || || ||
energy from one object or area
|| || || || ||
Which of the following is used to measure the quality of heat energy - ✔✔British thermal
|| || || || || || || || || || || || || || || ||
units BTUs or calories.
|| || ||
Which of the following are used in heat calculations - ✔✔Mass, latent heat, temperature,
|| || || || || || || || || || || || || ||
specific heat. ||
Latent heat of vaporization - ✔✔Is the heat energy required to cause a liquid to become a
|| || || || || || || || || || || || || || || || ||
vapor
Pressure is A measure of - ✔✔The relationship of a force being applied over a given area
|| || || || || || || || || || || || || || || ||
The relationship between temperature difference in heat flow is - ✔✔The greater the
|| || || || || || || || || || || || ||
temperature difference the more rapid the heat flows
|| || || || || || ||
Specific heat - ✔✔Is greater as a substance requires more heat energy to increase
|| || || || || || || || || || || || || ||
temperature
Temperature is a measure of - ✔✔The intensity of heat energy in an object
|| || || || || || || || || || || || ||
Which of the answers below is an example of heat transferred by conduction - ✔✔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 - ✔✔Conduction
|| || || || || || || || || || || || || ||
and convection
||
The condition of a boiling liquid is - ✔✔Saturated
|| || || || || || || ||
, 2
A vapor cannot be - ✔✔Subcooled
|| || || || ||
What kind of measure is a ton of refrigeration - ✔✔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 - ✔✔Sub
|| || || || || || || || || || || || || || || || ||
cooled
Which does the refrigerant in the condenser change State from vapor to a liquid - ✔✔The
|| || || || || || || || || || || || || || || ||
refrigerant loses heat energy to the sub rounding environment
|| || || || || || || ||
The expansion valve controls only one of its items below which is it - ✔✔The flow of liquid
|| || || || || || || || || || || || || || || || || ||
into the evaporator
|| ||
Flash gas is - ✔✔Only the gas created at the expansion device
|| || || || || || || || || || ||
Which is a example of pressure drop - ✔✔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 - ✔✔Changing from a liquid to a vapor
|| || || || || || || || || || || || ||
The latent heat of condensation of a substance is exactly the same quality as - ✔✔The
|| || || || || || || || || || || || || || || ||
latent heat of evaporation of the substance
|| || || || || ||
Saturated conditions exist - ✔✔At some point within an evaporator and condenser
|| || || || || || || || || || ||
Flash gas - ✔✔Is formed after the point of expansion
|| || || || || || || || ||
Industrial Refrigeration Exam with verified detailed answers || || || || || ||
As defined in chapter 1 of this text the primary purpose of refrigeration system is - ✔✔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. - ✔✔Basic
|| || || || || || || || || || || || || || ||
physical principles, Interpreparation of information from temperature and pressure gauges.
|| || || || || || || || || ||
Basic operating principles.
|| ||
Mechanical refrigeration is a series of steps that - ✔✔moves heat energy from the space or
|| || || || || || || || || || || || || || || ||
object to an area where It can do no harm.
|| || || || || || || || ||
Heat energy always flows - ✔✔From an object at a higher temperature to an object at a
|| || || || || || || || || || || || || || || || ||
lower temperature||
sensible heat - ✔✔Is heat energy that causes a change in temperature but does not cause a
|| || || || || || || || || || || || || || || ||
change of state
|| || ||
Latent heat - ✔✔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 - ✔✔Warm air
|| || || || || || || || || || || || || || || ||
moving over an object || || ||
How does the refrigeration technician/operator know what the conditions are within the
|| || || || || || || || || || || ||
refrigeration system - ✔✔By using his knowledge of system basic operating principles to
|| || || || || || || || || || || || ||
evaluate temperature and pressure readings
|| || || ||
,2
How was cooling accomplished by mechanical refrigeration system - ✔✔By removing heat
|| || || || || || || || || || || ||
energy from one object or area
|| || || || ||
Which of the following is used to measure the quality of heat energy - ✔✔British thermal
|| || || || || || || || || || || || || || || ||
units BTUs or calories.
|| || ||
Which of the following are used in heat calculations - ✔✔Mass, latent heat, temperature,
|| || || || || || || || || || || || || ||
specific heat. ||
Latent heat of vaporization - ✔✔Is the heat energy required to cause a liquid to become a
|| || || || || || || || || || || || || || || || ||
vapor
Pressure is A measure of - ✔✔The relationship of a force being applied over a given area
|| || || || || || || || || || || || || || || ||
The relationship between temperature difference in heat flow is - ✔✔The greater the
|| || || || || || || || || || || || ||
temperature difference the more rapid the heat flows
|| || || || || || ||
Specific heat - ✔✔Is greater as a substance requires more heat energy to increase
|| || || || || || || || || || || || || ||
temperature
Temperature is a measure of - ✔✔The intensity of heat energy in an object
|| || || || || || || || || || || || ||
Which of the answers below is an example of heat transferred by conduction - ✔✔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 - ✔✔Conduction
|| || || || || || || || || || || || || ||
and convection
||
The condition of a boiling liquid is - ✔✔Saturated
|| || || || || || || ||
, 2
A vapor cannot be - ✔✔Subcooled
|| || || || ||
What kind of measure is a ton of refrigeration - ✔✔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 - ✔✔Sub
|| || || || || || || || || || || || || || || || ||
cooled
Which does the refrigerant in the condenser change State from vapor to a liquid - ✔✔The
|| || || || || || || || || || || || || || || ||
refrigerant loses heat energy to the sub rounding environment
|| || || || || || || ||
The expansion valve controls only one of its items below which is it - ✔✔The flow of liquid
|| || || || || || || || || || || || || || || || || ||
into the evaporator
|| ||
Flash gas is - ✔✔Only the gas created at the expansion device
|| || || || || || || || || || ||
Which is a example of pressure drop - ✔✔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 - ✔✔Changing from a liquid to a vapor
|| || || || || || || || || || || || ||
The latent heat of condensation of a substance is exactly the same quality as - ✔✔The
|| || || || || || || || || || || || || || || ||
latent heat of evaporation of the substance
|| || || || || ||
Saturated conditions exist - ✔✔At some point within an evaporator and condenser
|| || || || || || || || || || ||
Flash gas - ✔✔Is formed after the point of expansion
|| || || || || || || || ||
