HVAC Unit 26 Application of Refrigeration
Systems Review Questions ACTUAL
QUESTIONS AND CORRECT ANSWERS
The two broad categories of display cases are _____ and ____. - COPRRECT
ANSWERS✅✅Open display and closed display pg 549
How are conditions maintained in open display cases when there are high shelves? -
COPRRECT ANSWERS✅✅Refrigerated air is heavy and settles to the bottom of the case.
Air patterns are formed to created air curtains that keeps the cooler air from leaving the case
and controlled. pg 550
What are mullion heaters? - COPRRECT ANSWERS✅✅They are heaters made of
resistance-type wire that runs just under the surface of the cabinet. They keep moisture from
forming on the sides of the refrigeration cabinet. pg 568
The three temperature ranges for refrigeration systems are ______, _______ and _______. -
COPRRECT ANSWERS✅✅High, medium and low pg 549
The two methods for rejecting heat from refrigerated cases are ______ and ______. -
COPRRECT ANSWERS✅✅Condensing unit built inside the box or a remote condensing
unit. pg 550
When the compressors are located in the equipment room, the piping is routed: - COPRRECT
ANSWERS✅✅A) in floor chases or in plastic pipes under the floor. pg 564
When one large compressor is used, what desirable feature should it have? - COPRRECT
ANSWERS✅✅A three-way heat reclaim valve. pg 553
Define a parallel compressor system and list five advantages of these systems. - COPRRECT
ANSWERS✅✅Parallel compressor systems apply two or more compressors to a common
suction header, a common discharge header and a common receiver. Advantages are
- load matching, most important
- diversification
Systems Review Questions ACTUAL
QUESTIONS AND CORRECT ANSWERS
The two broad categories of display cases are _____ and ____. - COPRRECT
ANSWERS✅✅Open display and closed display pg 549
How are conditions maintained in open display cases when there are high shelves? -
COPRRECT ANSWERS✅✅Refrigerated air is heavy and settles to the bottom of the case.
Air patterns are formed to created air curtains that keeps the cooler air from leaving the case
and controlled. pg 550
What are mullion heaters? - COPRRECT ANSWERS✅✅They are heaters made of
resistance-type wire that runs just under the surface of the cabinet. They keep moisture from
forming on the sides of the refrigeration cabinet. pg 568
The three temperature ranges for refrigeration systems are ______, _______ and _______. -
COPRRECT ANSWERS✅✅High, medium and low pg 549
The two methods for rejecting heat from refrigerated cases are ______ and ______. -
COPRRECT ANSWERS✅✅Condensing unit built inside the box or a remote condensing
unit. pg 550
When the compressors are located in the equipment room, the piping is routed: - COPRRECT
ANSWERS✅✅A) in floor chases or in plastic pipes under the floor. pg 564
When one large compressor is used, what desirable feature should it have? - COPRRECT
ANSWERS✅✅A three-way heat reclaim valve. pg 553
Define a parallel compressor system and list five advantages of these systems. - COPRRECT
ANSWERS✅✅Parallel compressor systems apply two or more compressors to a common
suction header, a common discharge header and a common receiver. Advantages are
- load matching, most important
- diversification
