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Thanks! You are right, it's nothing to worry about because there's nothing we can do but go kick it's ***, lol!

Of course there's is no requirement...and no magical number...that's why I said it's either getting easier or about to average out. Here's the bottom line....would you rather take an exam where the passing rate high or low? Obviously, high. Based on history, a 72 is high and based on history...

I can only speak for the last time I took the exam. I took the exam in SC in Apr 06. I just remember by the time you wait in line and get admitted then they go over the instructions, then fill out the exam answer sheet with name, etc., the exam starts late. That means you go to lunch late...

Ask your 1st question to these guys... http://www.ncees.org/licensure/licensing_b.../new_jersey.php My guess is, most people spend 250 or more hours studying for the ME PE. Start your study with the Mechanical Engineering Reference Manual, Problems and Solutions to that Manual, 6 minute...

That's not the point...you're right 2% doesn't mean anything but typically a higher passing rate is followed by a not so high passing rate. A 72 is the highest on record...I bet the one on Friday will be several percent lower...and yeah that makes a difference.

The pass rate for April 09 was 72% (higher than it's ever been)... http://www.ncees.org/exams/pass_rates/ And the pass rate for October 08 was 70%... http://ppi2pass.com/ppi/PPIInfo_pg_myppi-f...epassrates.html If you look at the history it means 1 or 2 things... 1) This thing is getting...

:suicide:

Oh, yeah...if you are talking about those you can also get older one cheaper online.

Not sure which ones you are talking about but you may want to do a Google search for them.

Great info guys!

Yeah I saw that errata too. I don't think that helps us much though. Most of the time books use De when using the duct friction loss chart but sometimes they use Dh. I think the difference is... Use De for the duct loss chart (figure 20.4 MERM) when the cfm is known...and this is the case...

When do we use Dequivalent and when do we use Dhydraulic??? De = (1.3*(short side * long side)^(5/8))/(short side + long side)^(1/4) Dh = 4*(area of flow/perimeter of flow) They are both used when working duct problems and I' not sure when to use which type of diameter. Please help...thanks!

You don't need the cp and density of the refrigerant. It's the Cp and density of water. It says the condenser has water entering the condenser at 75 and leaving at 85 so Q=mdot*CPwater*deltaT. Get mdot then convert to gpm and the refrigerant load is the 50,000/12000. Does that help?

I'll look at this...give me about 10 minutes...

POPAC...you are the man! Thanks for all your help lately! You're going to kill the exam Friday!

yeah most will use Q=1.08*CFM*delta T. It's an HVAC shortcut equation used only for sensible heat.

and send it to me too...you already have my addy

I have gone back over the NCEES sample exams and the solutions to those. I've noticed that since I'm running out of time and guessing on a few at the end that sometimes those few I don't get to are really easy. So I'm thinking about changing my strategy a little. I was just working the...

Yeah NCEES doesn't have very good solutions! They do not eplain with they include friction...seems to me like they should not include friction.

This is really an easy problem but the thing I don't understand is why include the friction hp in as the condenser Qout? Seems like the condenser Qout would be 23.2*12000 +33.5hp*2545(conv factor) = 363,657 btu/hr The friction hp in the compressor is not taken out as Qout in the condenser is...