What purpose do batter boards serve? a. they hold sting lines that serve as reference marks for foundations b. they carpenters cut hip rafters in complex roof framing c. they brace foundation walls against cave-ins d. they prevent the collapse of heavy timber beams or trusses in the event of fire

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor