Multiple Choice Which of the following best describes the role of engineers?

A) Engineers must clearly determine exactly what needs to be solved or designed.

B) Engineers must earn a bachelor’s and a master’s degree before getting hired.

C) Engineers must be sure every change they make is a functional design improvement.

D) Engineers must be content working in an office setting.

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