To obtain an accurate return-air temperature, what type of thermometer would a technician need to use to target the return-air grille?
A) Digital B) Glass-stem C) Dial D) Infrared
[Ques. 2] Increasing the airflow across a coil:
A) Increases the latent capacity.
B) Decreases the static pressure drop across the coil.
C) Increases the bypass factor.
D) Decreases the bypass factor.
[Ques. 3] When an evaporator coil gets dirty:
A) The temperature drop across the coil decreases.
B) The static pressure drop across the coil decreases.
C) The thermostatic expansion valve feeds more refrigerant to compensate.
D) The static pressure drop across the coil increases.
[Ques. 4] One advantage of the glass-stem thermometer is that it:
A) Can cover a wide range with a precise resolution.
B) Is more rugged than electronic thermometers.
C) Can easily display the difference between two separate temperatures.
D) Does not rely on any mechanical or electronic device that can malfunction.
[Ques. 5] Optional components on the high side of a refrigeration system include:
A) Suction to liquid heat exchanger, economizer, and oil level regulator.
B) Discharge line muffler, oil separator, liquid receiver, and liquid line filter-drier.
C) Suction line filter, accumulator, and evaporator pressure regulator.
D) All optional components can be used on the high side of the system.
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