Engineering, 18.11.2019 18:31 chloeholt123
Carbon steel (aisi 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace whose gases are at 1200 k and provide a convection coefficient of latex: 100\: \frac{w}{m^2.k}100 w m 2 . k. if the shafts enter the furnace at 300 k, how long (in seconds) must they remain in the furnace to achieve a center-line temperature of 800 k?
Answers: 1
Engineering, 04.07.2019 16:10
An electrical motor raises a 50kg load at a construct velencity .calculate the power of the motor, if it takes 40sec to raise the load through a height of 24m(take g =9.8n/g)
Answers: 2
Engineering, 04.07.2019 18:10
Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -26Β°c with a volumetric flow rate of 0.18 m3/s. refrigerant exits at 9 bar, 70Β°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
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 18:10
Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way
Answers: 2
Carbon steel (aisi 1010) shafts of 0.1-m diameter are heat treated in a gas-fired furnace whose gase...
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