HVAC, Piping, Gages Flashcards
What is required when adding oil to an AC compressor?
Record date and quantity, the excess oil should be removed if the oil that was trapped in the system returns
WHat can happen in an AC/R pump system if there is too much oil?
the excess oil can return as slugs causing compressor damage
WHat are the tree viscosities of oil for a refrigeration system?
150, 300, 500
What viscosity oil do most refrigeration systems use?
300
What state is refrigerant in an AC/R when it is in liquid and gas form in the same space?
Saturated
What state is refrigerant in an AC/R when it is in liquid and gas form in the same space?
Saturated
duct work spaces are measured in
CFM cubic feet per minute
When do you secure the purifier?
after the pump has stopped
What prevents returning fluid from being immediately drawn back into the suction line
baffle plates
Calibrating 24 months for 24 months for 36 months for 12 months for gauges in Rejusted_red sticker
24 months for pressure gauges 24 months for meters/Xducers 36 months for temp gauges 12 months for gauges in weapon spaces? Rejusted_red sticker dont use
Critical gauges include? 1 2 3 4
serious damage to equipment
personal injury
jeopardize curter mission
violations of environmental regulations
When selecting a gauge for normal working pressure select
33-66%
union is? how many pieces?
piping to be taken down for repair 4 pieces
coupling is? how many pieces?
two pieces female threads on both sides
pipe cutter#2 cutter
⅛”-2”
