BCG QUIZ 3 WITH QUESTIONS,
ANSWERS AND RATIONALE 2025
Refrigeration can be described as _____.
a. the process of making products cold
b. the process of introducing heat to a location where is not wanted
c. the process of removing heat from a place where it is not wanted to a place where it makes
little or no difference
d. none of the above ------- Correct Ans ---------- c. the process of removing heat from a place
where it is not wanted to a place where it makes little or no difference
The pressure in a refrigeration system is changed in the _____.
a. condenser and compressor
b. compressor and expansion device
c. expansion device and evaporator
d. condenser and evaporator ------- Correct Ans ---------- b. compressor and expansion device
The refrigerant in a refrigeration system changes state in the ____.
a. condenser and compressor
b. compressor and expansion device
c. expansion device and evaporator
d. condenser and evaporator ------- Correct Ans ---------- d. condenser and evaporator
At what location or locations in a refrigeration system does the saturation pressure correspond
to the saturation temperature?
a. compressor and evaporator
,b. evaporator and condenser
c. condenser and expansion device
d. compressor ------- Correct Ans ---------- b. evaporator and condenser
Which of the following refrigerants has the lowest boiling temperatures at atmospheric
pressure?
a. R-12
b. R-22
c. R-134a
d. R-502 ------- Correct Ans ---------- d. R-502
What happens when room temperature soda is poured into a glass of ice?
a. The ice gets colder.
b. The ice melts because it is giving up the "cold" to the soda.
c. The ice melts because it is absorbing heat form the soda.
d. The ice melts because the soda is colder than the ice. ------- Correct Ans ---------- c. The ice
melts because it is absorbing heat form the soda.
Ice melts in iceboxes because ____.
a. Heat flows through the insulated walls.
b. Heat enters when the door is opened.
c. Heat enters when the warm food is placed in the icebox.
d. All of the above ------- Correct Ans ---------- d. All of the above
High temperature refrigeration is that produced by____.
a. heat from a furnace
b. an air-conditioning system
,c. the vegetable cooling system of a refrigerator
d. the freezer section of a refrigerator ------- Correct Ans ---------- b. an air-conditioning system
A ton of refrigeration is equal to ____.
a. 1 ton of ice
b. 288,000 Btu/24-hr
c. 144 Btu/hr
d. 12,000 Btu/min ------- Correct Ans ---------- b. 288,000 Btu/ 24-hr
The evaporator in a refrigeration system _____.
a. reduces the boiling point of the refrigerant
b. condenses the refrigerant
c. absorbs heat from the product to be cooled
d. compresses the refrigerant vapor ------- Correct Ans ---------- c. absorbs heat from the product
to be cooled
The compressor in a refrigeration system _____.
a. raises the boiling point of the refrigerant
b. pumps the refrigerant throughout the system
c. both a and b
d. none of the above ------- Correct Ans ---------- b. pumps the refrigerant throughout the system
The condenser ____.
a. reject the heat from the refrigerant
b. controls the refrigerant flow throughout the system
c. adds superheat to the refrigerant
, d. all of the above ------- Correct Ans ---------- a. reject the heat from the refrigerant
Reciprocation compressors have _____.
a. a piston and cylinder
b. two scrolls that mesh together
c. a rotor to compress the refrigerant
d. a large fan compressor component ------- Correct Ans ---------- a. a piston and cylinder
Good ventilation is important when working around refrigeration equipment because modern
refrigerants _____.
a. are toxic and can poison you
b. have unpleasant odor
c. are heavier than air and may displaced the oxygen around you
d. both a and c ------- Correct Ans ---------- c. are heavier than air and may displaced the oxygen
around you
The law requires technicians to recover refrigerant from all refrigeration systems to that they
____.
a. Will not be released into the atmosphere.
b. may be used again.
c. may be reclaimed for future use
d. all of the above ------- Correct Ans ---------- d. all of the above
When a refrigerant enters the compressor, it is a ____ and when it leaves the compressor, it is a
_____.
a. low pressure low temperature super-heated vapor, high pressure high temperature super-
heated vapor.
ANSWERS AND RATIONALE 2025
Refrigeration can be described as _____.
a. the process of making products cold
b. the process of introducing heat to a location where is not wanted
c. the process of removing heat from a place where it is not wanted to a place where it makes
little or no difference
d. none of the above ------- Correct Ans ---------- c. the process of removing heat from a place
where it is not wanted to a place where it makes little or no difference
The pressure in a refrigeration system is changed in the _____.
a. condenser and compressor
b. compressor and expansion device
c. expansion device and evaporator
d. condenser and evaporator ------- Correct Ans ---------- b. compressor and expansion device
The refrigerant in a refrigeration system changes state in the ____.
a. condenser and compressor
b. compressor and expansion device
c. expansion device and evaporator
d. condenser and evaporator ------- Correct Ans ---------- d. condenser and evaporator
At what location or locations in a refrigeration system does the saturation pressure correspond
to the saturation temperature?
a. compressor and evaporator
,b. evaporator and condenser
c. condenser and expansion device
d. compressor ------- Correct Ans ---------- b. evaporator and condenser
Which of the following refrigerants has the lowest boiling temperatures at atmospheric
pressure?
a. R-12
b. R-22
c. R-134a
d. R-502 ------- Correct Ans ---------- d. R-502
What happens when room temperature soda is poured into a glass of ice?
a. The ice gets colder.
b. The ice melts because it is giving up the "cold" to the soda.
c. The ice melts because it is absorbing heat form the soda.
d. The ice melts because the soda is colder than the ice. ------- Correct Ans ---------- c. The ice
melts because it is absorbing heat form the soda.
Ice melts in iceboxes because ____.
a. Heat flows through the insulated walls.
b. Heat enters when the door is opened.
c. Heat enters when the warm food is placed in the icebox.
d. All of the above ------- Correct Ans ---------- d. All of the above
High temperature refrigeration is that produced by____.
a. heat from a furnace
b. an air-conditioning system
,c. the vegetable cooling system of a refrigerator
d. the freezer section of a refrigerator ------- Correct Ans ---------- b. an air-conditioning system
A ton of refrigeration is equal to ____.
a. 1 ton of ice
b. 288,000 Btu/24-hr
c. 144 Btu/hr
d. 12,000 Btu/min ------- Correct Ans ---------- b. 288,000 Btu/ 24-hr
The evaporator in a refrigeration system _____.
a. reduces the boiling point of the refrigerant
b. condenses the refrigerant
c. absorbs heat from the product to be cooled
d. compresses the refrigerant vapor ------- Correct Ans ---------- c. absorbs heat from the product
to be cooled
The compressor in a refrigeration system _____.
a. raises the boiling point of the refrigerant
b. pumps the refrigerant throughout the system
c. both a and b
d. none of the above ------- Correct Ans ---------- b. pumps the refrigerant throughout the system
The condenser ____.
a. reject the heat from the refrigerant
b. controls the refrigerant flow throughout the system
c. adds superheat to the refrigerant
, d. all of the above ------- Correct Ans ---------- a. reject the heat from the refrigerant
Reciprocation compressors have _____.
a. a piston and cylinder
b. two scrolls that mesh together
c. a rotor to compress the refrigerant
d. a large fan compressor component ------- Correct Ans ---------- a. a piston and cylinder
Good ventilation is important when working around refrigeration equipment because modern
refrigerants _____.
a. are toxic and can poison you
b. have unpleasant odor
c. are heavier than air and may displaced the oxygen around you
d. both a and c ------- Correct Ans ---------- c. are heavier than air and may displaced the oxygen
around you
The law requires technicians to recover refrigerant from all refrigeration systems to that they
____.
a. Will not be released into the atmosphere.
b. may be used again.
c. may be reclaimed for future use
d. all of the above ------- Correct Ans ---------- d. all of the above
When a refrigerant enters the compressor, it is a ____ and when it leaves the compressor, it is a
_____.
a. low pressure low temperature super-heated vapor, high pressure high temperature super-
heated vapor.
