NYC RMO EXAM, CHAPTER 17 (Cryogenics)
questions with verified answers
17.01.) If a compression refrigeration system is operating at the standard ton
conditions of 86 degrees F on the high side and an evaporator temperature of 5
degrees F. These temperatures corresponding to suction pressure of 34.27 psia,
and a head pressure of 169.2 psia. Based on these values, what will the
compression ratio be? Ans✓✓-4.94
17.02.) Which set of operating conditions would require the use of a booster
compressor? Ans✓✓-15 psig/ 280 psig
17.03.) Which of the following explains why compressors are installed in a series
arrangement? Ans✓✓-To obtain sufficiently low evaporator temperature
17.04.) In a low temperature refrigeration system where would the booster
compressor be located? Ans✓✓-On the leaving side of the evaporator
17.05.) Upon inspecting a booster compressor system, where would you expect to
find the intercooler? Ans✓✓-Between the booster compressor and the primary
compressor suction
17.06.) Of the following statements concerning the compression ratio of a
refrigerating reciprocating compressor, the one that is most nearly correct is that
the compression ratio? Ans✓✓-Varies according to the conditions under which
the compressor operates
questions with verified answers
17.01.) If a compression refrigeration system is operating at the standard ton
conditions of 86 degrees F on the high side and an evaporator temperature of 5
degrees F. These temperatures corresponding to suction pressure of 34.27 psia,
and a head pressure of 169.2 psia. Based on these values, what will the
compression ratio be? Ans✓✓-4.94
17.02.) Which set of operating conditions would require the use of a booster
compressor? Ans✓✓-15 psig/ 280 psig
17.03.) Which of the following explains why compressors are installed in a series
arrangement? Ans✓✓-To obtain sufficiently low evaporator temperature
17.04.) In a low temperature refrigeration system where would the booster
compressor be located? Ans✓✓-On the leaving side of the evaporator
17.05.) Upon inspecting a booster compressor system, where would you expect to
find the intercooler? Ans✓✓-Between the booster compressor and the primary
compressor suction
17.06.) Of the following statements concerning the compression ratio of a
refrigerating reciprocating compressor, the one that is most nearly correct is that
the compression ratio? Ans✓✓-Varies according to the conditions under which
the compressor operates
