Question 194Refrigeration/AC - Assistant Engineer70% to pass
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?
AI Explanation
The correct answer is B) excessive amount of non-condensable gases trapped in the condenser.
If increasing the cooling water flow to a refrigeration condenser fails to lower the condenser pressure, the probable cause is likely due to an excessive amount of non-condensable gases trapped in the condenser. Non-condensable gases, such as air, can accumulate in the condenser and prevent the refrigerant from properly condensing, resulting in higher than normal condenser pressure. Increasing the cooling water flow would not be able to overcome this issue, as the non-condensable gases are the root cause.
The other answer choices are incorrect because: A) a low level of Freon would not prevent the condenser from operating properly, C) an evaporator coil in need of defrosting would affect the low-pressure side of the system, and D) a partially blocked thermal expansion valve would affect the low-pressure side as well.
Related Questions
#192 If the running suction pressure at the refrigeration compressor of a TXV controlled air- cooled refrigeration system is below normal, which of the following can be a cause? #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? #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 #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