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Which of the following is a boiling temperature of an R-11 refrigerant at a pressure of 14.7 PSIA?
For leak testing a low pressure refrigeration system, what is the maximum pressure that can be applied?
The most efficient method of leak checking a charged low-pressure refrigeration unit is to _____.
pressurize the system using controlled hot water or heater blankets.
A typical setting for the high-pressure cut-out control on a recovery unit used for evacuating refrigerant from a low-pressure chiller is ____.
The oil should be heated to _______ °F before removing it from refrigeration system to minimize the refrigerant leakage.
If the pressure in the refrigeration circuit is lowered, it causes the refrigerant _______
Liquid to vaporize.
How long would an equipment owner or operator have to retrofit or retire an appliance that has exceeded the threshold leak rate if the replacement appliance uses 50 pounds or more of an exempt refrigerant?
When removing oil from a low‐pressure system, which temperature must be attained?
130 degrees F.
What happens to the system when moisture presents in an operating system?
Acid will form
When evacuating a system, the hoses should be _______
Short in length
The maximum test pressure for leak testing a low-pressure centrifugal is _______.
Low pressure refrigeration system will operate at _______
Below atmospheric pressure
Which of the following components directly follows the evaporator in the refrigeration system?
A charged low pressure refrigeration system can be efficiently leak-checked by _____.
raising system pressure by heating with circulated hot water or heating blankets.