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I passed the ME-Thermal & Fluids Exam last Oct. NCEES sample problems have a mix of easy and hard problems. The easy problems you can solve with 1 minute, but the hard problems can take up to 10 min. The averaging out of time hopefully works out, therefore you should know exactly what you...

I agree, many people will say to study both units. I did not see a point in solving the same problem twice with different units; so long as you know how to convert properly (and use 'g" when necessary), the math will come out exactly the same. Honestly, it was a little tedious converting from...

_____________ Hello Tim, For this problem, State 1 & State 2 occur in the super heated region, therefore the equations of hf+(x)hfg are not applicable, because the states do not fall within the dome. Just as you already noticed, hg = the value of saturated vapor. The SH region is located...

__________ Hi Tim, Try this: 1) You know that at state 1, P1 = 120 psia and T1 = 400 F. When you look at your steam tables by pressure at 120 psia, you see that the vaporization temperate is 341.25 F, which means you are now in the superheated region because your T1 = 400 F. Proceed to the...

My common mistake has been solving for the wrong thing. For example, when given the working pressures and temperatures of an adiabatic turbine in a rankine cycle, the problem would ask for the efficiency of the cycle, and I would solve for the efficiency of the turbine. And the efficiency of the...

___________ Hello Lily, I’ve used the low pressure air tables in Thermo: First Law – when analyzing an air compressor operating at stead state. When given the inlet and outlet pressures and temperatures, you can look up the enthalpy at each state then “plug and chug” …after converting...