3E151P Practice Test

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.

The version of this CDC we have in the database is 1

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  • 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?
    Compounding
  • 4 . 64. (216) What should be done to water chillers during the winter?
    Completely drained
  • 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?
    Saturated
  • 7 . 104. (019) Approximately what percent of the evaporator tubing bundle is covered by the normal refrigerant charge in the centrifugal machine?
    50.
  • 8 . 42. (008) On systems that contain over how many pounds of refrigerant is passive recovery not authorized?
    15.
  • 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.