Realizar un programa con el lenguaje de bloques de funciones (FBD) y diagrama de contactos (ladder) de la imagen propuesta donde Km1 y Km2 son motores. El circuito consiste en el control de un contactor KM1 que es gobernado mediante una botonera de marcha-paro. este contactor activa un temporizador a la conexión, el cual transcurrido un tiempo prefijado activa un segundo contactor.

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

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false