A 40 cubic ft compressor tank container has a gauge pressure of 140 psi and a temperature of 80 °F. The temperature after some time decreases
to 50 °F. Find the final absolute pressure in the tank after the temperature
change. Assume standard atmospheric pressure is 14.7 psi and absolute
temperature is Rº = F° + 460.*
A. 166.24 psi
B. O 146.1 psi
C. O 224.0 psi
87.5 psi

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

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation