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Commercial Refrigeration Final Study Guide with Complete Solutions
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  • Commercial Refrigeration
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  • Commercial Refrigeration

Commercial Refrigeration Final Study Guide with Complete SolutionsCommercial Refrigeration Final Study Guide with Complete SolutionsCommercial Refrigeration Final Study Guide with Complete SolutionsCommercial Refrigeration Final Study Guide with Complete Solutions The evaporator in a refrigeration...

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  • September 19, 2024
  • 9
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • commercial refrigeration final study guide with co
  • commercial refrigeration final study guide stuvia
  • the evaporator in a refrigeration system must be c

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  • Commercial Refrigeration
  • Commercial Refrigeration

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Commercial Refrigeration Final
Study Guide with Complete
Solutions

The evaporator in a refrigeration system must be colder Than the refrigerated space
in order to absorb heat. - ANSWER - True


The rule of thumb for low temperature refrigeration is 5 degrees superheat. -
ANSWER - True


Capillary tube systems are normally used for storage of already refrigerated
products. - ANSWER - True


Fewer fins per inch on an evaporator allows more ice to build between defrost
cycles. - ANSWER - True


Multiple circuit evaporator uses an externally equalized expansion valve. - ANSWER
- True


Refrigerants that boil off at different rates are called zeotropic blends. - ANSWER -
True


R-22 is considered a low pressure refrigerant. - ANSWER - False


High superheat means your TXV is flooding the coil. - ANSWER - False


The fastest defrost method is hot gas defrost. - ANSWER - True


Hot gas and electric defrost use the same time clock. - ANSWER - True

, If you are a refrigeration technician, a warm coat, hat and gloves should be in your
truck even in the middle of the summer. - ANSWER - True


The voltage that opens the point of a potential real is called the drop-out voltage. -
ANSWER - True


Good ventilation is important when working around refrigeration equipment
because modern refrigerants ______________ . - ANSWER - Are heavier than air and
may displace the oxygen around you


A thermostatic expansion valve controls refrigerant flow to the evaporator based on
____________ . - ANSWER - Rate of liquid vaporization, evaporator suction line
superheat, and external equalizer pressure.


The start capacitor is wired in series with the start relay. - ANSWER - True


Walk-in box temperature box is not needed when calculating the TD of an
evaporator coil. - ANSWER - False


The contacts in a current type starting relay are normally closed. - ANSWER - False


A motor can burn-out if the supply voltage is either too high or too low. - ANSWER -
True


A run capacitor helps a compressor run efficiently by slightly energizing the start
winding. - ANSWER - True


The suction and discharge valves in a reciprocating compressor open and close
depending on the difference in pressure across them. - ANSWER - True


When setting a fan cycle switch, you should set the cut-out to a pressure equivalent
to 90 degrees condensing temperature. - ANSWER - True

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