The Mach number distribution in a shear layer of air is measured by a "pitot-rake" as shown below.
static pressure in the slow moving layer is 10 psia.
Calculate the Mach number M1 thru M4 in the shear layer when the
Po4 = 50 psia
Po3 = 28 psia
Po2 = 17 psia
Po, = 13 psia
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Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70°c. changes in kinetic and potential energy from inlet to exit can be ignored. determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kw.

Manometers are good examples of measuring instruments, nowadays they are not as common as before. a)-capacitive probe gauges b)-gravitational gauges deformation ) gauges d)-digital gauges

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.