In the figure, U-section steel purlins are used in the roof beam. Purlins are simply headstock and L = 4m has openness. Purlins are allowed for evenly distributed vertical load q = 1250N / m including dead load they are exposed. Since the slope of the roof is given as tan (α) = 3/4; a) For the section in the middle of the span, calculate the normal stresses for the four corner points. b) What is the angle between the neutral axis and the x axis?

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

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure