Which basic principle is one that influences how all HVACR systems work?
A) Pressure affects boiling point and evaporation in an unpredictable way, so it must not be considered in HVACR equipment.
B) A decrease in pressure increases the boiling point of liquid, the temperature at which a liquid turns to a gas.
C) An increase in pressure can lower the boiling point of a liquid and change the temperature at which it turns to a gas.
D) An increase in pressure can increase the boiling point of a liquid, the temperature at which a liquid turns to a gas.
D
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Worker bees flap their wings to keep the hive at ___ °F
a. 102 c. 65 b. 85 d. 95
Laminitis develops in horses when the blood flow to the foot is interrupted by excessive stress on the feet and/or toxins that adversely affect circulation. Examples of diseases or conditions that may trigger laminitis include
A. Digestive upsets B. High fevers/retained placenta C. Systemic infections D. Overeating lush pasture E. All of the above
Technician A says a hazardous waste must exhibit four different characteristics to be classified as such. Technician B says it is a hazardous waste if it is considered toxic. Who is correct?
A. Technician A only B. Technician B only C. Both Technicians A and B D. Neither Technician A nor B