beam is required to carry a uniform dead load of 3.4 kip/ft plus its self-weight, and a concentrated dead load of 12 kips and a concentrated live load of 20 kips, both at the center of a 40 ft span. For bending only, determine the least-weight W-shape to carry the load. Consider only the limit state of yielding and use A992 steel. Design by (a) LRFD and (b) ASD.

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false