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Found out I passed! Self study with many weekends on the couch. I thought Thermal and Fluids was pretty hard. Could have gone either way but glad it's over. 

I'm trying to understand when to use MERM Eqn 36.28 vs Eqn 36.31.   It states that the former is used for constant heat flux and the latter for constant wall temp but what does this mean exactlly?  Just want to know if there is a rule of thumb for knowing when each is applicable based on problem...

This seems like one of the easier questions, but the answer doesn't make sense to me.  It uses more geometry than T&F.  The screw won't fit until the hole is tapped in step 3, but the solution uses the hole initially drilled from step 1.  I get .233 (B) as my answer since 3/8 + 2*.233 = .78. 

I'm working a Brayton Cycle problem, but I'm getting two different answers when trying to solve and I can't figure out why.  Given: Pressure Ratio = 8:1 Combustor Temp prior to Turbine = 1253K     App 23.S determines p_r prior to turbine =284.3 Trying to find Temp after Turbine Method 1...

For subcooled water, is the enthalpy value obtained by looking up saturation pressure or temperature? Thanks.

I am having difficulties knowing when it is acceptable to apply the h=cp*deltaT condition.  I am working through some problems and I can't distinguish why in some cases they just use h.  For instance, one problem expands steam from a turbine with cooling water available and it's setup as...

Problem 21 statement and accompanying solution below.  Can't understand why cylinder force uses (1 - eff).  Is this in error? Problem statement and Eqn 19.21 in MERM both state that this value is usually .85.  If not in error, why does power required for friction losses not also use the same...

I am trying to solve some HVAC problems which sometimes involves acquiring enthalpies. The MERM estimates these values using Eqn 38.18 and 38.19. In some instances, I get very different answers when trying to solve myself where the solution for these types of problems sometimes uses the low...

I don't understand the solution to this stress problem. Any help would be greatly appreciated. My issue mainly stems from the fact that you are given normal stress z, but not normal stress x or y (using problem statement axes) yet solution calls for normal stress z. Solution:

Trying to understand why my solution doesn't give correct answer from prob 50.5 in MERM Practice Problems.  Problem asks for Ix of parabola given as y^2=x from 0 to 9 (x) and 0 to 3 (y).  Answer is 32.4in^4. My solution is Ix=integral(y^2 dA).  I define dA as g(y) dy fron Eqn 50.4 and since...

I've been using the MERM and practice problem books in order to prepare for the PE.  I honestly don't know how anyone could possibly get through all the material in 6 months.  I started around May with spending what must be a couple hundred hours already and I'm only about halfway through. ...

I am using the 13th edition of the Mechanical Engineering Practice Problem book to help prepare for the upcoming PE.  I am confused about one of the questions.  Namely, Section 29, Prob 4, part f.  This solution is eventually obtained by rearranging Eqn 28.72. where BHP = IHP - FHP. What's...

I'm trying to understand how a boiler component can add heat and still be considered an isobaric process.  I know that it should according to the rankine cycle.  It seems like if you add heat inside a rigid-walled structure, the pressure must be increased if a superheated state is reached per...