Question 42Refrigeration/AC - QMED70% to pass
A small obstruction at the thermostatic expansion valve inlet will result in which of the following conditions?
AI Explanation
The correct answer is A) Lower than normal suction pressure.
A small obstruction at the thermostatic expansion valve inlet will restrict the flow of refrigerant entering the valve, resulting in a lower than normal suction pressure. This occurs because the obstruction limits the amount of refrigerant that can pass through the valve, reducing the pressure in the suction line.
The other answer choices are incorrect:
B) Ice forming is not the sole cause, and an adverse condition will occur due to the reduced refrigerant flow.
C) A higher than normal discharge pressure is not a direct result of the obstruction at the expansion valve inlet.
D) Expansion valves are not designed to pass small foreign particles indefinitely without issue.
Related Questions
#40 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 #41 Which of the following statements describes the accepted method for testing a thermostatic expansion valve? #43 If the superheat setting of a thermostatic expansion valve is set too low, what would be the result, assuming that the system has a single evaporator? #44 The coil temperature measured at the expansion valve sensing bulb of an operating system is 10°F. The low side pressure with the compressor running as shown on the gauge illustrated indicates 15 psig. What adjustments or changes, if any, should be made to the system? Illustration GS-RA-16 #45 If the superheat value of the thermostatic expansion valve is adjusted too high, what would be the result?