Question 197Refrigeration/AC - Assistant Engineer70% to pass
Which of the illustrated gauges is capable of measuring vacuums at the micron level for the purpose of proving system dehydration during system evacuation with a vacuum pump, but displays the achieved vacuums at incremental threshold intervals rather than continuously? Illustration GS-RA-37
AI Explanation
The correct answer is B.
The gauge depicted in illustration GS-RA-37 that is capable of measuring vacuums at the micron level for the purpose of proving system dehydration during system evacuation with a vacuum pump, but displays the achieved vacuums at incremental threshold intervals rather than continuously, is option B.
This type of gauge is commonly used in the marine industry, including for Coast Guard-regulated systems, to verify that a sufficient vacuum has been achieved during the evacuation process to remove moisture and contaminants prior to charging a system. The incremental display, rather than a continuous readout, is a common feature of these specialized vacuum gauges.
The other options, A, C, and D, do not match the specific capabilities and display characteristics described in the question.
Related Questions
#195 Which of the following statements is true concerning the illustrated gauge manifold set? Illustration GS-RA-01 #196 Which of the following statements is true concerning the gauge labeled "A" of the illustrated gauge manifold set? Illustration GS-RA-01 #198 What is true concerning frost build-up on the evaporator coils of a multi-box direct expansion refrigeration system? #199 Some 'hot gas' defrost systems reheat the refrigerant just prior to its returning to the compressor for what purpose? #200 What is the physical state and pressure condition of refrigerant as it enters the condenser of a typical refrigeration system?