Listed below are sample questions for 3E151P from our database. Register now to start taking tests for this AFSC! We have 293 questions currently in the database for this category.
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The version of this CDC we have in the database is 1
1 . 32. (411) An antisiphon valve is used on a chemical feed system when the chemical feed tank is
above the treated equipment
2 . 112. (024) What program is designed to keep heating, ventilation, air-conditioning, and refrigeration (HVAC/R) equipment in operational condition?
Recurring maintenance program
3 . 90. (017) What is it called when two or more compressors are piped in series to one another?
4 . 64. (216) What should be done to water chillers during the winter?
5 . 36. (613) What are preventive maintenance checks and services (PMCS) used for?
Find and correct or report problems
6 . 74. (014) What condition must exist before using a pressure-temperature (PT) chart?
7 . 104. (019) Approximately what percent of the evaporator tubing bundle is covered by the normal refrigerant charge in the centrifugal machine?
8 . 42. (008) On systems that contain over how many pounds of refrigerant is passive recovery not authorized?
9 . 42. (614) It is recommended that the bare base air conditioner not be operated in the AUTOMATIC mode for cooling when the outside temperature is below?
50° Fahrenheit (F)
10 . 45. (009) R–401A is not a suitable alternative refrigerant for
residential air conditioners.
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