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Seattle ROL All Possible Questions and Answers with complete solution
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According to the SMC group, #2 refrigerants are - Toxic, flammable, explosive under certain conditions, and includes ammonia and SO. A hermetic system is a totally enclosed refrigeration system when the - Motor and compressor are sealed within the same system with the refrigerant. A heat pump h...

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  • August 20, 2024
  • 17
  • 2024/2025
  • Exam (elaborations)
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  • Seattle ROL
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Seattle ROL
According to the SMC group, #2 refrigerants are - Toxic, flammable, explosive under certain
conditions, and includes ammonia and SO.



A hermetic system is a totally enclosed refrigeration system when the - Motor and compressor are
sealed within the same system with the refrigerant.



A heat pump has what type of valve that redirects refrigerant flows from heating to cooling? - A
four way reversing valve



A capillary tube system responds to an overcharge by - Head pressure.



A capillary tube system responds to an undercharge by - Low suction pressure and low head
pressure.



A condenser water regulator works off the - Compressor head pressure.

A 4-way reversing valve is used to - Redirect refrigerant flows from heating to cooling in a heat
pump.



A crankcase heater is installed on a compressor to - Evaporate the refrigerant out of the oil.



A green colored cylinder is used for - R-22 refrigerants.



A light blue colored cylinder is used for - R-134a refrigerants.



A low ambient control cycles the condenser fan to - Control head pressure.



A low pressure switch can provide low charge protection by - Shutting down the system on low
pressure.

,A permanent replacement for CFC-12 is - HFC-134a.



A pressure responsive mechanism designed to automatically relieve excessive pressures. - Is a
pressure relief valve



A refrigeration system rated at 5 tons has the ability of removing - 60,000 btuh.



A rose colored cylinder is used for - R-410a refrigerants.



A rupture disk is located - On the cooler of a chiller.



A silver colored cylinder is used for - R-717.



A temporary replacement for CFC-12 is - HCFC -22.



A TXV system responds to an overcharge by - High head pressure.



A TXV system responds to an undercharge by - Low suction pressure and bubbles in the sight
glass.



A water regulator works off the - Compressor discharge pressure.



A white colored cylinder is used for - R-12.



According to the SMC group, #1 refrigerants are - Safe, non-flammable, non-explosive and
includes refrigerants like Freon and CO.

According to the SMC group, #3 refrigerants are - Very explosive and for lab use only, they include
propane and butane.

, After you have a compressor burnout and the new compressor is installed, you should then -
Evacuate, purge, replace the filter/dryer, and charge carefully.



Air in the system will cause an - Increase in head pressure.



All refrigerant technicians must be certified after - November 14, 1994.



An AXV system responds to an undercharge by - Low suction pressure and bubbles in the sight
glass.



An AXV system responds to overcharge by - High head pressure.



An electric motor and compressor built into an integral housing similar to those in home refrigerators is a
- Hermetic Compressor



An open cooling tower capacity is - Controlled by the wet bulb temperature of the air.



An orange colored cylinder is used for - R-11 refrigerants.



An orchid colored cylinder is used for - R-502 refrigerants.



Are you allowed to change the type of refrigerant in a system? - NO



Are you allowed to change the type of refrigerant in the system as a Refrigeration Operating Engineer
with the City of Seattle. - No, never.



Are you allowed to change the type of refrigerant in the system? - NO

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