Question 195Refrigeration/AC - Assistant Engineer70% to pass
Which of the following statements is true concerning the illustrated gauge manifold set? Illustration GS-RA-01
AI Explanation
The correct answer is D) Closing the valve labeled "G" isolates the hose labeled "H" from the hose labeled "J".
This is correct because the valve labeled "G" acts as an isolation valve, allowing the user to isolate the hose labeled "H" from the hose labeled "J" when closed. This is a common function of gauge manifold sets, to allow for the isolation of individual components for testing or maintenance purposes.
The other answer choices are incorrect because:
A) Opening both valves "G" and "C" is not necessary to read the system pressures on the respective gauges.
B) Closing valve "G" does not isolate the hose "H" from the gauge "A", it isolates it from the hose "J".
C) Fully opening and back seating valve "G" does not isolate the gauge "A" from the hose "H", closing the valve does.
Related Questions
#193 In an operating, water-cooled, multi-box refrigeration system, both low discharge and high suction pressures are being simultaneously experienced. The probable cause for this condition is which of the following? #194 If increasing the cooling water flow to a refrigeration condenser fails to lower the condenser pressure, the probable cause may be due to what condition? #196 Which of the following statements is true concerning the gauge labeled "A" of the illustrated gauge manifold set? Illustration GS-RA-01 #197 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 #198 What is true concerning frost build-up on the evaporator coils of a multi-box direct expansion refrigeration system?