Even with the correct refrigerant charge, a water-cooled system would appear overcharged if:
A) It had a restricted liquid-line filter drier.
B) It had higher-than-normal water flow through the condenser.
C) It had lower-than-normal water flow through the condenser.
D) The air filter was dirty.
[Ques. 2] An air conditioner is operating with low system pressures, an evaporator saturation temperature of 20F, and a suction line temperature of 24F. The suction line is frosting. The most likely cause of these symptoms is:
A) The system is overcharged.
B) Reduced airflow across the evaporator.
C) Excessive humidity in the air, causing the coil to frost up.
D) The system is undercharged.
[Ques. 3] Root-mean square (RMS) is a mathematical formula for:
A) Determining the price of a replacement compressor.
B) Calculating the electrical power passing through a alternating current circuit.
C) Measuring the pressure drop across an air filter.
D) Determining the physical resistance of an AC motor.
[Ques. 4] When choosing an electric meter, it is important to use the proper category rating:
A) For the meter.
B) For either the meter or the leadsneither is necessary.
C) For the meter leads.
D) For both the meter and the leads.
[Ques. 5] In general, a system that is overcharged will have:
A) A low subcooling and a high superheat. B) A high subcooling and a low superheat.
C) A high subcooling and a high superheat. D) A low subcooling and a low superheat.
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