Engineering, 30.03.2020 23:07 Freindofafreind
A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal expansion occurs at TH = 1500 K and the isothermal compression occurs at TC = 290 K. Determine: (a) the thermal efficiency. (b) the percent change in thermal efficiency if TH increases by 5% while TC remains the same. (c) the percent change in thermal efficiency if TC decreases by 5% while TH remains the same. (d) the percent change in thermal efficiency if TH increases by 5% and TC decreases by 5%.
Answers: 3
Engineering, 04.07.2019 18:10
Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.
Answers: 3
Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Engineering, 04.07.2019 19:10
Agas is compressed from vi 0.3 m, p 1 bar to of v2 0.1 m3, p2--3 bar. pressure and volume are related linearly during the process. for the gas, find the work, in kj.
Answers: 2
Engineering, 06.07.2019 03:10
Explain the strain-hardening phenomenon on the basis of dislocation - dislocation strain field interactions. also, briefly describe what generally happens to the ductility of a metal that has been strain hardened (i.e. does strain hardening make a metal more ductile or
Answers: 3
A gas within a piston-cylinder assembly executes a Carnot power cycle during which the isothermal ex...
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