11-12)Define a vacuum and tell how it is measured.
11-13)Why are some liquid column pressures expressed in inches of water and others in inches of mercury?
11-14)What causes fluid pressure?
11-15)What is the pressure at the bottom of a square tank that has a cross section of 5ft2and is filled with water to a depth of 4ft? Only the depth is relevant.
11-16)What is the pressure in psi required to lift water 15 feet?
11-17)Explain how a simple open arm manometer measures pressure.
11-18)Explain how a bourdon tube gauge works.