What are the main differences between pipefitters and plumbers? (Select all that apply.)
Pipefitters design systems whereas plumbers maintain systems.
Pipefitters generally work on larger-scale industrial projects.
Pipefitters and plumbers do not belong to the same unions.
Pipefitters may work with HVAC; plumbers generally do not.

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.

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

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.