Which of the following best characterizes the main difference between the International Building Code (IBC) and the International Residential Code (IRC)? Most states have adopted the IBC; the IRC is far less common.

The IBC is a collection of federal codes; the IRC is a collection of regional codes.

The IBC applies to all buildings; the IRC is specific to housing.

Most states have adopted the IRC; the IBC is far less common.

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