Author Question: Which basic principle is one that influences how all HVACR systems work? A) An increase in ... (Read 72 times)

jeatrice · **on:** Jul 24, 2018

Which basic principle is one that influences how all HVACR systems work?

A) An increase in pressure can lower the boiling point of a liquid and change the temperature at which it turns to a gas.
B) A decrease in pressure increases the boiling point of liquid, the temperature at which a liquid turns to a gas.
C) Pressure affects boiling point and evaporation in an unpredictable way, so it must not be considered in HVACR equipment.
D) An increase in pressure can increase the boiling point of a liquid, the temperature at which a liquid turns to a gas.

Question 2

What is the estimated length of a building that has 35 roof rafters 24 inches on center?

A) 72 feet B) 66 feet C) 70 feet D) 68 feet