A batch reactor and a PFR are operating side by side with the same influent waste stream. The batch reactor operates on a two-hour cycle (all in and all out), and the PFR receives the waste stream as a constant flow and operates in steady state. The first-order reaction rate coefficient for both reactors is 0.26 hr-1. The flowrate through the 72 m3 PFR is 36 m3/hr. The effluent concentration from the PFR is:

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

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

Journeyman training is usually related (clo2) a)-to specific tasks b)-to cost analysis of maintenance task c)-to control process to ensure quality d)-to installation of machinery