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
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
