Which of the following refrigerants is a recommended drop-in replacement for reefer trailer R22 refrigeration systems?
A. R-12
B. HFC 422d
C. R-134a
D. propane
Answer: B
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Las condiciones de servicio habituales de la NEMA incluyen un límite de temperatura ambiental de:
a. 40°C. b. 50°C. c. 60°C. d. 70°C.
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The material responsible for the transfer of traits is grouped together in chromosomes
Indicate whether the statement is true or false
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Technician A says that variable valve timing improves performance. Technician B says that cylinder deactivation helps improve performance. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
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What are three important items to consider in the design of commercial refrigeration systems?
What will be an ideal response?
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