ESS exam 2 review ACTUAL UPDATED QUESTIONS AND CORRECT ANSWERS
, What is vacuum? A measurement below atmospheric pressure (at sea level)
multiple units for pressure: SI and Imperial
U-tube manometer used to measure pressure difference of two fluids (usually gases) with a
measurement fluid
could be water, mercury, light oil, etc.
the difference is expressed as "distance of fluid"
Barometer used to measure atmospheric pressure
traditionally it uses mercury
measurement is expressed as "distance of fluid"
mercury is measured 30 inches
water is measured 33 feet
How is vacuum created? remove gas molecules from the defined volume
a compressor can remove molecules
condensing of steam creates vacuum
specific volume volume/mass
density mass/volume
suction head positive pressure pushing into the pump
discharge head positive pressure resulting from pump work
total head height the fluid is moved (top of fluid pumped to highest point)
shut off head amount of head made with no flow
, What is vacuum? A measurement below atmospheric pressure (at sea level)
multiple units for pressure: SI and Imperial
U-tube manometer used to measure pressure difference of two fluids (usually gases) with a
measurement fluid
could be water, mercury, light oil, etc.
the difference is expressed as "distance of fluid"
Barometer used to measure atmospheric pressure
traditionally it uses mercury
measurement is expressed as "distance of fluid"
mercury is measured 30 inches
water is measured 33 feet
How is vacuum created? remove gas molecules from the defined volume
a compressor can remove molecules
condensing of steam creates vacuum
specific volume volume/mass
density mass/volume
suction head positive pressure pushing into the pump
discharge head positive pressure resulting from pump work
total head height the fluid is moved (top of fluid pumped to highest point)
shut off head amount of head made with no flow
