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UNIT 10 REVIEW QUESTIONS ANSWER KEY GO BACK TO INDEX
10-1) How does atmospheric pressure affect a refrigeration gauge pressure reading?
10-2) What is a fluid?
10-3) Define pressure.
10-4) What creates atmospheric pressure?
10-5) What is the difference between absolute pressure and gauge pressure?
10-6) What causes atmospheric pressure to change?
10-7) What is the relationship between atmospheric pressure and barometric
pressure?
10-8) The reading on a low side pressure gauge is 65 psig. What is the absolute
pressure?
10-9) Convert a chart reading of 100 psia to the reading you would seeingauge
pressure.
10-10) Convert a barometric pressure reading of 26 inches Hg to psia.
10-11) Convert a reading of 20 inches HG vacuum to psia.
10-12) Define a vacuum and tell how it is measured.
10-13) Why are some vacuum pressures expressed in inches of water and others
in inches of mercury?
10-14) What causes fluid pressure?
10-15) What is the pressure at the bottom of a square tank that has a cross section of
5ft2 and is filled with water to a depth of 4ft?
10-16) What is the pressure in psi required to lift water 15 feet?
10-17) Explain how a simple open-arm manometer measures pressure.
10-18) Explain how a bourdon tube gauge works.
The bourdon tube is an oval metal tube that is curved along its length and
10-19) Briefly summarize Dalton’s Law.
10-20) What temperature in degrees Fahrenheit would a fixed volume of gas need to
be heated to in order to double its pressure if it starts out at 25°F?
10-21) 4ft3 of gas is compressed from 50°F at 70 psig to 2ft3 with the resulting
temperature of 100°F. What is the new pressure?
10-22) Explain the bar pressure measurement system.
10-23) Which is a larger unit of pressure: 1 kilopascal or 1 psi?
10-24) Why do saturated gases not follow the ideal gas law?
10-25) Explain Pascal’s law.
