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A grievance has been filed by the union at Dorben Co. regarding the final inspection station, in which the operator slightly lifts a 20 lb assembly, examines all sides, and, if acceptable, sets it back down on the conveyor, where the assembly goes to the packing station. The inspector examines, on average, 5 assemblies per minute at an energy expenditure level of 6 kcal/min. The conveyor is 40 inches off the
floor and the assembly while being inspected is roughly 20 inches from the inspector. Evaluate the job with respect to the NIOSH lifting guidelines and metabolic energy expenditure considerations. Indicate whether the job exceeds allowable limits. If it does, calculate how many assemblies the inspector may inspect per minute without exceeding acceptable guidelines.
A circular rapid-mix basin with stator blades is to be designed totreat 2.0 million gallons of water per day. The detention times hould be 60 seconds with a velocity gradient of 900s-1
Explain the log growth phase of population generation showing the population growth curve (S curve). Deduce the equation for this method of population projection.
A flat bar of cross section 20mm by 70mm elongates 4.0mm in a length of 2.0m as a result of axial load. If the elastic modulus is 199x106 kN/m2 and Poisson's ratio is 0.25 for the material, find the axial load and the total change in each cross secti..
An insulated piston cylinder device initially contains 0.01m^3 of steam at 473 K the force on the piston is such that it maintains a constant pressure of 400kpa Inside . A valve is now opened and steam at 1Mpa at 473 K is allowed to enter the cylinde..
Assume that landing aircraft have priority over departing aircraft. Also assume each aircraft carriers 200 passengers. What is the total delay to the passengers in the 20 departing aircraft?
What is the major head loss in a coarse concrete pipe with a diamter of 1ft that is 100 ft long. Water flows at a rate of 20 ft^3/s (viscosity of water = 2.344x10^-5 lbfs/ft^2, density of water = 1.94 slugs/ft^3) 1inch = 25.4mm
An equal tangent vertical curve conects an initial grade of -3% and a final grade of +1% and is designed for 60mi/h. The PVI is at station 250+50 and elevation 732 ft. What is the station and elevation of the lowest point on the curve
An 18in. diameter sewer is placed on a grade of 1.5ft/1000ft. What are the discharge and the flow veloctiy when the pipe is full
The flywheel of a prototype car engine is under test. The angular position of the flywheel is given by x = (3.0rad/s3)t3 and the diameter of the flywheel is 36cm.
A 4 mgd water treatment planet is being designed for an overflow rate of 0.5 gpm/ft^2. If two circular sedimentation basins will be used at al times, what should be the diameter of each basin
An 800 ft ship has a displacement of 35,000 tons, and the area defined by the waterline is 38,000 ft^2. Will the ship take more or less draft when streaming from salt water to fresh water? How much will it settle or rise?
The forces F1, F2, and F3, all of which act on point A of the bracket, arespecified in three different ways. Determine the x and y scalar components of each of the three forces.
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