A restricted inlet screen on a TEV can cause:
A) High suction pressure, low superheat, and low subcooling.
B) High suction pressure, high superheat, and low subcooling.
C) Low suction pressure, low superheat, and low subcooling.
D) Low suction pressure, high superheat, and high subcooling.
[Ques. 2] Flash gas in the liquid line can be identified by:
A) A significant temperature increase in the liquid line temperature.
B) The bright flashes of light that accompany the flash gas.
C) A significant temperature drop in the liquid line temperature.
D) The popping sound the refrigerant makes every time a new flash explodes.
[Ques. 3] A system with a loose TEV sensing bulb would most likely:
A) Have a lower-than-normal evaporator pressure.
B) Have a high superheat.
C) Need adjusting to compensate for the poor bulb installation.
D) Have a low superheat.
[Ques. 4] Why does the condenser line travel farther from left to right than the evaporator line in a refrigeration cycle PH diagram?
A) The condenser operates at a higher temperature.
B) The condenser operates at a higher pressure.
C) The condenser must get rid of the heat of the compressor as well as the heat gained in the evaporator.
D) Extra efficiency is gained by rejecting more heat than is gained.
[Ques. 5] What is an oil lift?
A) An oil lift helps return oil up a vertical riser using an integral orifice tube, which creates a Bernoulli effect, forcing oil up the line.
B) An oil lift is an electric oil pump that moves collected refrigerant oil up against gravity.
C) An oil lift is a trap at the bottom of a vertical suction riser.
D) An oil lift is the increase in pressure created in the suction line due to the presence of refrigerant oil.
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