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A continuous hot rolling mill has eight stands. The dimensions of the starting slab are: thickness = 3.0 in, width = 15.0 in, and length =10 ft. The final thickness is to be 0.3 in. Roll diameter at each stand 36 in, and rotational speed at stand number 1 =30 rev/min. It is observed that the speed of the slah entering stand 1 = 240 ft/min. Assume that no widening of the slab occurs during the rolling sequence. Percent reduction in thickness is to be equal at all stands, and it is assumed that the forward slip will be equal at each stand. Determine
(a) percent reduction at each stand,
(b) rotational speed of the rolls at stands 2 through 8, and
(c) forward slip.
(d) What is the draft at stands 1 and 8?
(e) What is the length and exit speed of the final strip exiting stand 8?
The total volume of a soil specimen is 120 cm3 and its total mass is 220g. Specimen porosity is 0.4 and specific gravity of solids is 2.66 Determine the following: (a) water content, (b) void ratio, (c) degree of saturation, and (d) dry density.
Atlas Long-Haul Transportation is considering installing Valutemp temperature loggers in all of its refrigerated trucks for monitoring temperatures during transit. If the systems will reduce insurance claims by $100,000 two years from now
A valve is now opened and steam at 1Mpa at 473 K is allowed to enter the cylinder until the volume inside increases to 0.04m^3 . Determine the final temperature of the steam and the amount of mass transfer
List five different structure-sensitive properties.
What should be the mass m of the ram? Compute the velocity v of the pile immediately after impact if the ram is dropped from a height of 4 m onto the pile. Also compute the energy loss ?E due to impact at each blow.
If the length of the river connection between the two lakes is equal to 3km and the velocity in the river is equal to 0.4 m/s, determine the concentration of UBOD in the effluent from the second lake.
An axial force of 200 kN is applied to the assembly by means of rigid end plates. Determine the normal stress in the aluminum shell.
A nation has a high Human Development Index and a high gross domestic product. Which of the following factors might result in classification of the nation as developing rather than developed?
consider a cylindrical nickel wire 2.0 mm in diameter and 3 x 10^4 mm long. Calculate its elongation when a load of 300 N is applied. Assume that the deformation is totally elastic.
Higher water level inside the eye, combined with wind results in a "storm surge". Calculate the force on the levee gates form storm surge 20 feet above level of the lake traveling at about 25 ft/sec.
the 15,000 kg boxcar A is coasting freely at 1.5 m/s on the horizontal track when it encounters a tank car B having a mass of 12,000 kg and coasting at 0.75 m/s toward it. If the cars meet and couple together
Calculate the water/cement ratio of the cement paste in which all the cement will hydrate to leave no capillary pores. (density of cement: 3.1 g/cm3) ?
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