Commercial and Domestic
Refrigeration Questions and
Answers (Graded A)
Low-temperature food storage applications generally start at - ANSWER - 0°F
If the application requires a coil design to operate below freezing, there must be
provision for - ANSWER - defrost
A typical superheat for an evaporator operating under normal conditions would be -
ANSWER - 8 to 12°F
High-temperature refrigeration applications will normally provide box temperatures
of - ANSWER - 47 to 60°F
the air means to remove the moisture, and this is frequently desirable in
refrigeration systems. - ANSWER - dehumidifying
-temperature refrigeration produces temperatures below the freezing point of water.
- ANSWER - low
As a rule of thumb, the temperature of the evaporator should be about _°F colder
than the box temperature. - ANSWER - 15
The capacity (tonnage) of the heat exchanger can vary with its height and depth. -
ANSWER - false
The refrigeration evaporator is a component that absorbs heat from the conditioned
space into the refrigeration system. - ANSWER - true
,is the best method of checking to see when a refrigerant coil has a proper level of
refrigerant. - ANSWER - superheat
The process of removing heat from a place where it is not wanted and transferring
that heat to a place where it makes little or no difference is known as - ANSWER -
refrigeration
The household refrigerator fresh-food compartment typically ranges from - ANSWER
- 28 to 40°F
A direct expansion-type evaporator is also called a - ANSWER - dry-type evaporator
Every central split cooling system manufactured in the USA today must have a
Seasonal Energy Efficiency Ratio (SEER) of at least 10. - ANSWER - f
When the refrigerant vapor is saturated with heat it is known as a(n) - ANSWER -
saturated vapor
SEER is calculated based on the total amount of cooling the system will provide over
the entire season, divided by the total number of _ it will consume. - ANSWER -
watts/hours
The ____ of the liquid refrigerant determines the coil operating temperature. -
ANSWER - boiling temperature
A refrigeration system designed for the storage of flowers or candy is considered a
____ type. - ANSWER - high temperature
The ____ in a refrigeration system is responsible for absorbing heat into the system
from whatever medium is to be cooled. - ANSWER - evaporator
A defrost system that pipes the compressor discharge vapor directly to the
evaporator is called a(n) _ type. - ANSWER - hot gas defrost
, The film factor is a relationship between the medium giving up heat and the heat-
exchange surface. - ANSWER - T
Evaporators that are operated full of liquid and are equipped with a device to keep
the liquid refrigerant from passing to the compressor are known as ____. - ANSWER -
flooded evaporators
A stamped plate evaporator usually does not use a fan to move air across it. -
ANSWER - T
evaporators are used when the coil would become too long for a single
circuit,percent vapor. - ANSWER - Multicircuit
The household refrigerator fresh-food compartment is a good example of ____
refrigeration. - ANSWER - medium-temp
If an evaporator has a pressure drop of 10 psig and the low side pressure is 15 psig,
what is the pressure at the inlet of the evaporator? - ANSWER - 25 psig
A typical evaporator operating temperature in an air-conditioning system is -
ANSWER - 40°F
To check the performance of a dry-type evaporator, the service technician would
first make sure that the refrigerant coil is operating with enough liquid inside. -
ANSWER - T
The boiling temperature and its relationship to the system exist in the - ANSWER -
Evaporators
Automatic pumpdown systems are equipped with a(n) _ to prevent refrigerant from
reaching the evaporator. - ANSWER - solenoid
Refrigeration Questions and
Answers (Graded A)
Low-temperature food storage applications generally start at - ANSWER - 0°F
If the application requires a coil design to operate below freezing, there must be
provision for - ANSWER - defrost
A typical superheat for an evaporator operating under normal conditions would be -
ANSWER - 8 to 12°F
High-temperature refrigeration applications will normally provide box temperatures
of - ANSWER - 47 to 60°F
the air means to remove the moisture, and this is frequently desirable in
refrigeration systems. - ANSWER - dehumidifying
-temperature refrigeration produces temperatures below the freezing point of water.
- ANSWER - low
As a rule of thumb, the temperature of the evaporator should be about _°F colder
than the box temperature. - ANSWER - 15
The capacity (tonnage) of the heat exchanger can vary with its height and depth. -
ANSWER - false
The refrigeration evaporator is a component that absorbs heat from the conditioned
space into the refrigeration system. - ANSWER - true
,is the best method of checking to see when a refrigerant coil has a proper level of
refrigerant. - ANSWER - superheat
The process of removing heat from a place where it is not wanted and transferring
that heat to a place where it makes little or no difference is known as - ANSWER -
refrigeration
The household refrigerator fresh-food compartment typically ranges from - ANSWER
- 28 to 40°F
A direct expansion-type evaporator is also called a - ANSWER - dry-type evaporator
Every central split cooling system manufactured in the USA today must have a
Seasonal Energy Efficiency Ratio (SEER) of at least 10. - ANSWER - f
When the refrigerant vapor is saturated with heat it is known as a(n) - ANSWER -
saturated vapor
SEER is calculated based on the total amount of cooling the system will provide over
the entire season, divided by the total number of _ it will consume. - ANSWER -
watts/hours
The ____ of the liquid refrigerant determines the coil operating temperature. -
ANSWER - boiling temperature
A refrigeration system designed for the storage of flowers or candy is considered a
____ type. - ANSWER - high temperature
The ____ in a refrigeration system is responsible for absorbing heat into the system
from whatever medium is to be cooled. - ANSWER - evaporator
A defrost system that pipes the compressor discharge vapor directly to the
evaporator is called a(n) _ type. - ANSWER - hot gas defrost
, The film factor is a relationship between the medium giving up heat and the heat-
exchange surface. - ANSWER - T
Evaporators that are operated full of liquid and are equipped with a device to keep
the liquid refrigerant from passing to the compressor are known as ____. - ANSWER -
flooded evaporators
A stamped plate evaporator usually does not use a fan to move air across it. -
ANSWER - T
evaporators are used when the coil would become too long for a single
circuit,percent vapor. - ANSWER - Multicircuit
The household refrigerator fresh-food compartment is a good example of ____
refrigeration. - ANSWER - medium-temp
If an evaporator has a pressure drop of 10 psig and the low side pressure is 15 psig,
what is the pressure at the inlet of the evaporator? - ANSWER - 25 psig
A typical evaporator operating temperature in an air-conditioning system is -
ANSWER - 40°F
To check the performance of a dry-type evaporator, the service technician would
first make sure that the refrigerant coil is operating with enough liquid inside. -
ANSWER - T
The boiling temperature and its relationship to the system exist in the - ANSWER -
Evaporators
Automatic pumpdown systems are equipped with a(n) _ to prevent refrigerant from
reaching the evaporator. - ANSWER - solenoid
