Engineering, 17.07.2019 21:10 xxtonixwilsonxx
Agas is compressed in a piston-cylinder assembly from pi = 2 bar to p2-8 bar, v2 = 0.02 m3 in a process during which the relation between pressure and volume s pv1.3 = constant . the internal energy of the gas increases by 50 kj/kg during the process, determine the heat transfer, in kj. kinetic and potential energy changes are negligible.
Answers: 2
Engineering, 04.07.2019 18:10
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.
Answers: 1
Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
Answers: 3
Engineering, 04.07.2019 18:10
Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk
Answers: 1
Engineering, 06.07.2019 05:10
Apipe of diameter 200 mm (constant) carrying water with an 5 mis and total head is density 1000 kg/m ) with velocity tpward slope. at a certain point, where the elevation is 5 m above a datum,the 21.5 m. a) determine the pressure of the pipe at 5m elevation. determine the pressure at elevation 10m (above same datum) if the of total head at 5m elevation.
Answers: 1
Agas is compressed in a piston-cylinder assembly from pi = 2 bar to p2-8 bar, v2 = 0.02 m3 in a proc...
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