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Determine the time required to complete a filling and emptying cycle for a refuse collection vehicle serving a residential area if the following conditions pertain: Truck volume 20 =yd3. Each location has on average two containers of 80 gallons each at 75% full. Refuse is picked up twice per week. Truck has a compaction ratio of 1:2. Pickup time is 1.58 min per service. Truck spends 20 min at the disposal site. It takes 35 min to drive to the disposal site. Assume a density of 250 lbs/cubic yard for uncompacted refuse and 500 lbs/cubic yard for compacted refuse.
A steel pipe with a 5 cm OD is covered with a 6.4 mm asbestos insulation (k=0.166 W/m.K) followed by a 2.5 cm layer of fiber glass insulation (k= 0.048 W/m.K). The pipe wall temperature is 315oC and the outside insulation temperature is 38oC. Calcula..
on an oil tanker saturated steam at 44 bar is supplied to deck auxiliaries through a steel pipe of 124 mm bore and 18
Air enters a nozzle steadily at 50 psia, 160°F, and 155 ft/s and leaves at 14.7 psia and 900 ft/s. The heat transfer from the nozzle to surrounding air is estimated to be 6.0 Btu/lb of air flowing. The inlet area of the nozzle is 0.15 ft2. Based on ..
steam enters a two-stage adiabatic turbine at 8 mpa and 550degc. it expands in the first stage to a pressure of 2 mpa.
a fluid has a viscosity of x nsm2 and is placed in a concentric cylinder viscometer. the gap width is g mm and the
The square gate AB is held in the position shown by hinges along its top edge A and by a shear pin at B. For a depth of water d = 3.5 ft, determine the force exerted on the gate by the shear pin.
Water is boiled at sea level in a coffee maker equipped with an immersion-type electric heating element. The coffee maker contains 1 L of water when full. Once boiling starts, it is observed that half of the water in the coffee maker evaporates in 25..
when a particle is projected vertically upwards with an initial velocity of v0 it experiences an acceleration a-gkv2
Calculate the resistance coefficient K for a ball-type check valve placed in a 2-in Schedule 40 steel pipe if water at 100°F is flowing with a velocity of 10 ft/s.
The beam consists of a W360 x 79 structural steel wide-flange shape [E = 200 GPa; I = 225 x 106 mm4]. For the loading shown, determine the reactions at A, B, and C (positive if the force is up, negative if down).
a sample of silty clay has a volume of 14.88cm3 a total mass of 28.81 g a dry mass of 24.83 g and a specific gravity of
If the mass diffusivity of hydrogen is 9 X 10-7 m2/s, how much time is required to bring the density of dis- solved hydrogen to a value of 1.2 kg/m3 at the center of the sheet?
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