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An automated transfer line is to be designed. Based on previous experience, the average downtime per occurrence = 5.0 min, and the probability of a station failure that leads to a downtime occurrence p = 0.01. The total work content time = 9.8 min and is to be divided evenly amongst the workstations, so that the ideal cycle time for each station = 9.8/n. Determine
(a) the optimum number of stations on the line n that will maximize production rate, and
(b) the production rate and proportion uptime for your answer to part (a).
A small, high-speed turbine operating on compressed air produces a power output of 0.1 hp. The inlet state is 120 psi, 200°F, and the exit state is 14.7 psi, - 20 F. Assuming the velocities to be low and the process to be adiabatic, find the required..
A 2000 ft2 house in Boston is being designed with NLC-12,000 Btu/F-day and 150 ft2 of direct gain. The direct gain system includes double glazing, nighttime insulation, and 30 Btu/ft2 F thermal storage capacity.
A water cooled compressor with air flowing at 0.1 kg/s enters at a temperature of 27C. The compressor work is 5 kW and the heat transfer rate to the water is 2kW. Use air as an ideal gas (Cp = 1.006 kJ/kg-K). Ignore changes in KE and PE.
A completely saturated clay sample is loaded in a cell test by a vertical stress of 80 kPa. Due to this load the cell pressure is found to increase by 20 kPa. If the soil were perfectly elastic, what would then be the increment of the pore pressur..
two weights are attached to a wheel pully m1 is 2.00 slugs and m2 is 1.00 slugs use kinetics to calculate the anguler
Its satu- rated vapor pressure for the prescribed conditions is approximately 5000 N/m2, and the diffusion coefficient of the vapor in air is 0.2 X 10-4 m2/s. What is the steady-state temperature of the beverage?
an electrical wire having a diameter of 1.5 mm and covered with a plastic insulation thickness 2.5 mm is exposed to
Identify the motion transformation taking place in a windshield wiper mechanism (Figure 1.4). What must the relationship between the links in this mechanism be to perform its function?
determine the equivalent state of stress on an element at the same point oriented 45 degrees clockwise with respect to
a piston-cylinder device contains an ideal gas. the gas undergoes two successive cooling processes by rejecting heat to
A disc with radius, R, rotates (at an angular speed of [omega]) near a surface that is fixed. The space between the disc and surface is filled with a fluid that has viscosity, µ. The distance between the disc and surface is h. Find the dependence bet..
he normally closed section of the button has been connected in series with the normally open run push button, and the normally open section of the jog button is connecting in parallel with the holding contacts. Explain how this circuit operates.
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