Air enters an adiabatic compressor at 100 kPa and 17 ºC at a rate of 2.4 m^3/s, and itexits at 257 ºC. The compressor has an isentropic efficiency of 84 percent. Neglecting the changes in kinetic and potential energies, determine the exit pressure of the air and the power required to drive the compressor. Use constant specific heatsfor air (Cp=1.005 kJ/kgK, γ=1.4, R =0.287 kJ/kgK)

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

Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives