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1. What is a stainless steel? Why are stainless steels stainless?
2. We wish to produce a martensitic stainless steel containing 17% Cr. Recommend a carbon content and austenitizing temperature that would permit us to obtain 100% martensite during the quench. What microstructure would be produced if the martensite were then tempered until the equilibrium phases formed?
Consider the 371-mm-diameter pump curve of Fig. 12.9. If the pump is run at 1200 rpm to deliver 0.8 m3 /s of water, find the resulting head rise and fluid power.
A torque M of 1510 N · m must be applied to the 50-mm-diameter shaft of the hoisting drum to raise the 500-kg load at constant speed. The drum and shaft together have a mass of 100 kg. Calculate the coefficient of friction µ, for the bearing.
Cooks often use aluminum pans for cooking in ovens. Some cooks try to reach into the hot oven and lift the pan out without hotpads. How successful would they be? Explain
Hemispherical end caps are welded to a cylindrical main body to form a propane storage tank. The tank has an inside diameter of d1=40in. and is to be subjected to a maximum internal pressure of p=120 psi. The allowable tensile stress in the wall of t..
the reynolds number of a fluid flowing through a 5-cm-diameter, square-edged orifice plate meter within a 15-cm pipe is 250,000. Find the discharge coefficient for flange taps.
Determine the outdoor (ventilation) air requirements for this unit based on the selected occupancies.
two streams of air mix in a constant-area mixing tube the primary stream enters the mixing tube at station 1 with a
An inventor claims to have developed a refrigeration unit with a COP of 8.5 which maintains the refrigerated space at -10oC while operating in a room where the temperature is 25oC.
the 680 kg load suspended from the helicopter is in equilibrium. the aerodynamic drag force on the load is horizonal.
the compressor mechanism shown in figure is driven clockwise by a dc electric motor at a constant rate of 800 rpm. in
2000 kgh of milk is sterilized in a steam infusion sterilizer steam and milk directly contact. the milk is heated to
A water fountain consume 24.1 amps (operating at 110 V) to chill water from 23 C to 5 C. It is known that heat is rejected from the unit at a rate of 9.5 kW. Assuming steady flow operation and constant specific heat for water (at 25 C)
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