Lindeburg Sample morning #5

[uzairsyedahmed]

Is there something wrong with the solution? the answer should be 390 tones. Work is 70 and Qin is 320. Shouldnt the heat rejected to condenser ( Q out) be Qin + W for refrigeration? The answer is given as 70 tons Q out. That doesnt seem right to me.

 

[nsgoldberg]

I'm going to start on that practice exam tomorrow. I've heard it's harder than the actual exam, so I'm hoping I can handle it without too much trouble.

About 2.5 weeks until the big one!

 

[uzairsyedahmed]

Its not that its only harder. harder would have been good. its just that it takes waaay too long. I tried to time the morning one. Was only able to do 25 of the problems in 4 hours. and I am pretty sure those were the 25 easiest ones that took me 4 hours!