112 study guide

What is the maximum amount of refrigerant that a recovery cylinder should obtain?

• 80% water capacity

• 70% water capacity

• 100% water capacity

• 90% water capacity

During push-pull liquid recovery, vapor refrigerant is pulled from the

• low side

• recovery cylinder

• compressor

• high side

if the entire refrigerant charge has leaked from a system, then a ____ should be used to pressurized the system.

• oxyacetylene mixture

• butane solution

• inert gas

• soap-water solution

Which evacuation method involves charging a system with nitrogen to absorb moisture?

• passive evac

• vapor evac

• deep evac

• triple evac

When charging a system with refrigerant, the tech should put the low and high side service valves in

• back seated position

• front seated position

• mid-position

• any position

What is the superheat of a system if the refrigerant temp in the suction line in 58F, its pressure in the evaporator is 60 psig, and the temp in 34f?

• 24f

• 26f

• 28f

• 32f

The process of pumping a systems entire refrigerant charge into a liquid receiver is called a

• evacuation

• recovery

• pump down

• triple evac

To determine a stsyems subcooling value, the liquid line temperatue should be subtracted from the

• evaporator

• compressor

• suction line

• condenser

many recovery cylinders use a ____ as a safety device to turn off the recovery machine when the cylinder is 80% full.

• filter drier

• liquid level switch

• low-side float

• pressure relief valve

calculate the tare weight of a cylinder if its total weight is 590 lbs and the weight of refrigerant of the cylinder is 450 lb.

• 140 lb

• 1040 lb

• 450 lb

• 590 lb