Reta Industrial Refrigeration Book 2 Exam || Most Recent
Exam 2026-2027 Actual Complete Real Exam Questions
And Correct Answers (Verified Answers) Already Graded
A+ || Newest Exam | Just Released!!
Which of the following defrosting methods allows cooling
during the defrost cycle? (pg. 10-8)
A) Hot gas
B) Water
C) Continuous
D) Electric - ANSWER -C) Continuous
What air defrost sequence first closes the liquid solenoid valve
to the coil, then
____________ the fans? (pg.
10-4)
A) Shuts
down
B)
Cycles
C) Slows
down
D) Continues to run - ANSWER -D)
Continues to run
Electric resistance defrost? (pg. 10-5)
A) Is commonly used on halocarbon systems
,B) Is the most energy efficient defrost method
C) Works best in DX systems
D) Is seldom used on halocarbon systems - ANSWER -A) Is
commonly used on halocarbon systems
Which defrost method does not involve a fan delay step in the
defrost cycle? (pg. 10-4/5)
A) Electric
B) Hot gas
C) Water
D) Air - ANSWER -D) Air
In the continuous defrost method, the fluid that is used to keep
frost from forming on the heat exchange surface
____________? (pg. 10-8)
A) Is not blown from the evaporator because it is thick and
heavy
B) Must be replaced frequently as there is no way to prevent its
dilution
C) Must be heated to prevent it from freezing on the evaporators
D) Is re-concentrated by an automatic re-generator - ANSWER -
D) Is reconcentrated by an automatic re-generator
The moisture / air relationship is? (pg. 10-1)
A) The warmer the air, the more moisture it can hold
B) The cooler the air, the more moisture it can hold
C) The more moisture the air has, the faster it will cool
D) Non-existent - ANSWER -A) The warmer the air, the more
moisture it can hold
,Frost build-up in storage freezers? (pg. 10-2)
A) Is usually greater in the winter months
B) Is usually greater in the summer months
C) Is not a problem on induced draft evaporators
D) Is not a problem on forced draft evaporators - ANSWER -B) Is
usually greater in the summer months
Which control component is usually used to stop liquid flow
into an evaporator
for temperature management or to defrost the
evaporator?
(pg. 10-
4)
A) Expansion
valve
B) Float
valve C)
Gate valve
D) Solenoid valve - ANSWER -D)
Solenoid valve
Which type of defrost system is often used for a 38°F dock
unit? (pg. 10-4)
A)
Air
B)
Water
, C) Brine
spray
D) Electric - ANSWER -
A) Air
Frost build-up on the evaporator? (pg. 10-2)
A) Increases capacity because frost is a good insulator
B) Decreases capacity because of reduced air flow
C) Increases capacity because frost is cold
D) Increases capacity because the frost increases "U" factor -
ANSWER -B) Decreases capacity because of reduced air flow
Which one below is not a common method of defrost? (pg. 10-
3)
A) Water
B) Air
C) Electric
D) Deposition - ANSWER -D) Deposition
Air defrost is frequently used?
(pg. 10-4)
A) In plate
freezers
B) In rooms operating
above 38°F
C) In rooms operating
below 38°F
Exam 2026-2027 Actual Complete Real Exam Questions
And Correct Answers (Verified Answers) Already Graded
A+ || Newest Exam | Just Released!!
Which of the following defrosting methods allows cooling
during the defrost cycle? (pg. 10-8)
A) Hot gas
B) Water
C) Continuous
D) Electric - ANSWER -C) Continuous
What air defrost sequence first closes the liquid solenoid valve
to the coil, then
____________ the fans? (pg.
10-4)
A) Shuts
down
B)
Cycles
C) Slows
down
D) Continues to run - ANSWER -D)
Continues to run
Electric resistance defrost? (pg. 10-5)
A) Is commonly used on halocarbon systems
,B) Is the most energy efficient defrost method
C) Works best in DX systems
D) Is seldom used on halocarbon systems - ANSWER -A) Is
commonly used on halocarbon systems
Which defrost method does not involve a fan delay step in the
defrost cycle? (pg. 10-4/5)
A) Electric
B) Hot gas
C) Water
D) Air - ANSWER -D) Air
In the continuous defrost method, the fluid that is used to keep
frost from forming on the heat exchange surface
____________? (pg. 10-8)
A) Is not blown from the evaporator because it is thick and
heavy
B) Must be replaced frequently as there is no way to prevent its
dilution
C) Must be heated to prevent it from freezing on the evaporators
D) Is re-concentrated by an automatic re-generator - ANSWER -
D) Is reconcentrated by an automatic re-generator
The moisture / air relationship is? (pg. 10-1)
A) The warmer the air, the more moisture it can hold
B) The cooler the air, the more moisture it can hold
C) The more moisture the air has, the faster it will cool
D) Non-existent - ANSWER -A) The warmer the air, the more
moisture it can hold
,Frost build-up in storage freezers? (pg. 10-2)
A) Is usually greater in the winter months
B) Is usually greater in the summer months
C) Is not a problem on induced draft evaporators
D) Is not a problem on forced draft evaporators - ANSWER -B) Is
usually greater in the summer months
Which control component is usually used to stop liquid flow
into an evaporator
for temperature management or to defrost the
evaporator?
(pg. 10-
4)
A) Expansion
valve
B) Float
valve C)
Gate valve
D) Solenoid valve - ANSWER -D)
Solenoid valve
Which type of defrost system is often used for a 38°F dock
unit? (pg. 10-4)
A)
Air
B)
Water
, C) Brine
spray
D) Electric - ANSWER -
A) Air
Frost build-up on the evaporator? (pg. 10-2)
A) Increases capacity because frost is a good insulator
B) Decreases capacity because of reduced air flow
C) Increases capacity because frost is cold
D) Increases capacity because the frost increases "U" factor -
ANSWER -B) Decreases capacity because of reduced air flow
Which one below is not a common method of defrost? (pg. 10-
3)
A) Water
B) Air
C) Electric
D) Deposition - ANSWER -D) Deposition
Air defrost is frequently used?
(pg. 10-4)
A) In plate
freezers
B) In rooms operating
above 38°F
C) In rooms operating
below 38°F
