What measurements are needed to determine if refrigerant in a refrigeration system is saturated, superheated, or subcooled?
A) Accurate pressure and temperature readings B) An accurate measurement of heat
C) A manometer and a sling psychrometer D) Enthalpy differential measurements
A
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Which of the following opposes any change in circuit current?
a. Capacitance b. Reactance c. Inductance d. Impedance
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Simple harmonic motion and constant velocity motion can both be used at high speeds.
Answer the following statement true (T) or false (F)
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The most common fan used for moving air through ductwork in residential air conditioning is
A) Forward curved centrifugal B) Backward curved centrifugal C) Vane axial D) Propeller
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All lines of the same type have uniform thickness throughout the drawing.
Answer the following statement true (T) or false (F)
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