Me 200 Exam 2 Questions With All Correct
& Verified Answers
1 dimensional flow Correct answer-flow is normal to the boundary at locations where mass enters
or exits the control volume
uniform flow Correct answer-all intensive properties are uniform with position over each inlet and
exit area through which mass flows.
closed system Correct answer-closed mass
open system Correct answer-control volume
steady state Correct answer-all properties are unchanging in time
Incompressible Flow Correct answer-density is constant, AV= constant
nozzle Correct answer-accelerate unit flow, inlet is larger than outlet, W = 0
diffuser Correct answer-decelerate unit flow, outlet is larger than inlet, W = 0
turbines Correct answer-produce work by expanding the fluid to a lower pressure, density, and
enthalpy, high P/H in, low P/H out, W > 0 (out)
Compressor Correct answer-increase pressure, density, and enthalpy of a gas through as work
input, high P/h going out, low P/h going in, W < 0 (in)
change state of gas
pumps Correct answer-working fluid is a liquid (incompressible), similar to compressor. Low p/h
going in, high p/h going out, W < 0 (in)
change state of liquids
Throttling Valves Correct answer-flow restricting devices that cause pressure to drop without work
output. flow control.
heat engine Correct answer-a device that converts heat into work
Refrigeration Cycle Correct answer-a sequence of thermodynamic processes whereby the use of a
refrigerant accomplishes the transfer of heat energy so that cooling results
work input
heat pump cycle Correct answer-provide heating to a dwelling using an energy input by work in the
form of electricity
work input
& Verified Answers
1 dimensional flow Correct answer-flow is normal to the boundary at locations where mass enters
or exits the control volume
uniform flow Correct answer-all intensive properties are uniform with position over each inlet and
exit area through which mass flows.
closed system Correct answer-closed mass
open system Correct answer-control volume
steady state Correct answer-all properties are unchanging in time
Incompressible Flow Correct answer-density is constant, AV= constant
nozzle Correct answer-accelerate unit flow, inlet is larger than outlet, W = 0
diffuser Correct answer-decelerate unit flow, outlet is larger than inlet, W = 0
turbines Correct answer-produce work by expanding the fluid to a lower pressure, density, and
enthalpy, high P/H in, low P/H out, W > 0 (out)
Compressor Correct answer-increase pressure, density, and enthalpy of a gas through as work
input, high P/h going out, low P/h going in, W < 0 (in)
change state of gas
pumps Correct answer-working fluid is a liquid (incompressible), similar to compressor. Low p/h
going in, high p/h going out, W < 0 (in)
change state of liquids
Throttling Valves Correct answer-flow restricting devices that cause pressure to drop without work
output. flow control.
heat engine Correct answer-a device that converts heat into work
Refrigeration Cycle Correct answer-a sequence of thermodynamic processes whereby the use of a
refrigerant accomplishes the transfer of heat energy so that cooling results
work input
heat pump cycle Correct answer-provide heating to a dwelling using an energy input by work in the
form of electricity
work input
