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ME 2334 test 1 Questions with Correct Answers

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ME 2334 test 1 control mass - Answer- boundary is fixed, no mass can transfer across the boundary (closed), but energy can control volume - Answer- boundary is moving, mass and energy can be transferred across boundary (open) isolated system - Answer- neither mass nor energy can transfer a...

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  • August 12, 2024
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  • ME 2334 1
  • ME 2334 1
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Freshy
ME 2334 test 1
control mass - Answer- boundary is fixed, no mass can transfer across the boundary
(closed), but energy can

control volume - Answer- boundary is moving, mass and energy can be transferred
across boundary (open)

isolated system - Answer- neither mass nor energy can transfer across boundary

extensive properties - Answer- mass dependent. mass, volume

intensive properties - Answer- mass independent. pressure, specific volume,
temperature, density

specific extensive property - Answer- dividing any extensive property by a mass

pressure - Answer- density*gravity*height [N/m^2]

process - Answer- a sequence of states for which all properties are defined

gauge pressure - Answer- P(gauge)=(density)gh

absolute pressure - Answer- gauge pressure + atmospheric pressure

specific volume - Answer- volume/mass

density - Answer- mass/volume or 1/specific volume

ideal gas law is only valid when - Answer- reduced pressure is less than .1 or
reduced temperature is greater than 2 or the compressibility factor(z) is approx 1

work considered to be done on a system if - Answer- the sole effect on things
external can be reduced to the lifting of a weight

no work = - Answer- no displacement, or no change in volume

isochoric - Answer- n=infinity, constant volume, work=0

isobaric - Answer- n=0, constant pressure

polytropic process - Answer- n does not equal 1

heat given to system is - Answer- positive

heat removed from system is - Answer- negative

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