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During the compression stroke of an engine, the work done on the working substance in the engine cylinder is 75kJ/kg and the heat rejected to the surroundings is 42kJ/kg. Find the change of internal energy stating whether it is an increase of decrease.
steam at 160 bar 520 degrees celsius and with a mass flow rate of 250 kgs enters a turbine operating at steady state
assume that the flow of air through a given duct is isentropic. at one point in the duct the pressure and temperature
Determine an equation for the efficiency of the gear train in terms of the load (torque) on shaft 2 and determine the input power required at shaft 1.
sterling silver is a metal alloy containing silver and copper. calculate the composition of both elements in mass
two streams of air are mixed in a steady state process. assume air is an ideal gas with a constant heat capacity cp72r
superheated steam at 120 bar and 520c leaves the steam generator of a vapor power plant and enters a turbine with an
air as an ideal gas is compressed from a state where the pressure is 0.1 mpa and the temperature is 27o to a state
In order to increase production rate, a reactor setpoint was increased from 160 psig to 190 psig. The reactor pressure transmitter was recalibrated from 0- 200 psig to 0- 300 psig. What is the percent span for the old and new setpoints?
the condensation that can occur in the low-pressure end of a steam turbine is undesirable because it can cause
a well-insulated turbine operating at steady state has two stages in series. steam enters the first stage at 800
Two bars, one having a circular section of radius b, the other an elliptic section with semiaxes a,b. For equal angles of twist, which bar experiences the larger shearing stress?
a pneumatic displacement gage is to be used to measure displacement between 0.1 and 0.2 mm. the output of the device is
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