Engineering, 17.07.2019 21:10 tiffanydowell13
Ahelium compressor the relative mach number is mr/s=0.85 at the shroud of the impeller. the inlet stagnation pressure and temperature are 101.325 kpa and 288 k. the mass flow rate is 1.8 kg/s. the hub- to-shroud radius ratio is 0.38, and the inlet flow is axial. determine; (a) the rotational speed of the impeller, (b) the axial velocity, and (c) the inducer shroud diameter, assuming that the inducer is designed for optimum relative flow angle, and that the compressor operates at the design point.
Answers: 3
Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
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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
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Engineering, 04.07.2019 18:10
Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.
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Engineering, 04.07.2019 18:10
Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery
Answers: 2
Ahelium compressor the relative mach number is mr/s=0.85 at the shroud of the impeller. the inlet st...
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