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In the taper turning job of previous Problem 22.4, sup-pose that the automatic lathe with surface speed control is not available and a conventional lathe must be used. Determine the rotational speed that would be required to complete the job in exactly the same time as your answer to part (a) of that problem.
Problem 22.4
A tapered surface is to be turned on an automatic lathe. The workpiece is 750 mm long with minimum and maximum diameters of 100 mm and 200 mm at opposite ends. The automatic controls on the lathe permit the surface speed to be maintained at a constant value of 200 m/min by adjusting the rotational speed as a function of work piece diameter. Feed = 025 mm/rev, and depth of cut = 3.0 mm. The rough geometry of the piece has already been formed, and this operation will be the final cut. Determine
(a) the time required to turn the taper, and
(b) the rotational speeds at the be-ginning and end of the cut.
The concentration of Chemical Oxygen Demand (COD) in the effluent from this system is 25 mg L-1. The growth rate of the organisms in this case is 0.9 days-1. The activated sludge tank has a volume of 50 m3 and the flow rate through it is 500 m3 da..
An in-ground swimming pool may have a leak. The 30-ft by 10-ft by 5-ft (depth) pool is filled on June 1. On June 13, a hose, flowing at a rate of 10 gallons per minute, is used to add water to the pool. The hose is turned off after 1 hour.
A lumber company that cuts fine woods for cabinetry is evaluating if it should retain the current bleaching system or replace it with the new one. The relevant costs of each system are known or estimated.
What fraction of the total average power is carried by the dc component? What fraction is carried by the ac components?
Determine who consumes the most calories. An olive contains about 5 Calories.
Estimate the size of a uniform, horizontal welded-steel pipe installed to carry 14.0 ft^3/sec of water 20 degreesC. The allowable pressure loss resulting from friction is 17ft/mi of pipe length.
Describe and provide reasons for the best measurement method to use when measuring the value of roads and highways.
What are the expressions for the shear, V, and the bending moment, M, within the beam between points C and D in terms of Ay, M1, l, w, and x, the distance to the sectional cut from the beam's left end?
a 300 lb block is supported by a rope that was wrapped 1 1/2 times around a horizontal rod. Knowing that the coefficient of static friction is .15 determine the range of values of P for which equilibrium is maintained
Develop the mass balance equation and solve for the deficit concentration as a function of x, u, Lo, Do, ka, kd,and ks in the stream. Lo ans Do are the initial concentrations of BOD and DO deficit in the stream at x
effect of acidic water on strength of soil used to store the water. the reduction in strength at various acidic ph
Determine the internal pressure that would cause yielding of the cylindrical thin walled pressure vessel. The ends are capped. The pressure vessel is made ofA36 steel.
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