Question

The most efficient method of leak checking a charged low-pressure refrigeration unit is to:

a) Use an electronic leak detector
b) Pressurize the system with nitrogen
c) Add a UV dye to the refrigerant
d) Inspect for oil stains around connections

Answer 1

The most efficient method of leak checking a charged low-pressure refrigeration unit is through the use of an electronic leak detector, due to its high sensitivity and accuracy.

Step-by-step explanation:

The most efficient method of leak checking a charged low-pressure refrigeration unit is to use an electronic leak detector. This method is favored over pressurizing the system with nitrogen, adding a UV dye to the refrigerant, or inspecting for oil stains because it is highly sensitive and capable of detecting very small leaks quickly and accurately. For instance, mass spectrometers, which are highly precise instruments, can detect leaks in systems such as those used in low-temperature physics laboratories by identifying the mass of ions to a very fine degree.