 |
| Author | Post |
|---|
gnrbernstein
Member
| Joined: | Sun Feb 5th, 2006 |
| Location: | ARCHITECT (It's Official!), Maryland USA |
| Posts: | 2284 |
| Exams Taken: | PD, GS, LF, ME, BD/MM, CD, SP, BP, BT | | Exams Passed: | PD, GS, LF, ME, BD/MM, CD, SP, BP, BT | | Describes Me: | |
| Status: |
Offline
|
| Mana: |    |
|
Posted: Sun Aug 20th, 2006 08:33 pm |
|
Okay boys and girls. Grab your MEP flashcards and follow along to make the changes. I should note that my set is from 2001 (NALSA, LLC. aka Archiflash) so maybe they've made the corrections themselves. Hopefully though, if they didn't, they didn't change the numbering. The numbering for my set goes from 577 - 792. (Note: some of this is also just additional information to add to your cards.)
#582 Decibel: A decibel is a basic unit of sound intensity level NOT a measure of sound intensity as stated on the card. Sound intensity is measured in Watts/cm sq. NOT in decibels.
#629 Conductance: Conductance is the rate at which a specific thickness of a material conducts heat. The definition given is for conduction, the heat transfer process which occurs when objects are in direct contact. Conduction transfers heat from the hotter object to the colder object.
#645 calculating cooling load: Know what the q's are for each.
- q(r) = solar heat gain through fenestration
- q (p) = internal heat gain from people
- q (m) = internal heat gain from equipment
- q (l) = internal heat gain from lights
- q (cldt) = solar heat gain through the building envelope (conduction)
#683 Minimum vent diameter: 1-1/4 and HALF the diameter of the vented drain, whichever is larger.
#684 Refrigeration Cycle diagram: Add a box after the heat arrow coming from the condenser that says "cooling tower (opt.)" inside the box.
#703 Infiltration: Correct equations for Q(cfh) - the amount of air infiltration
- for air change method, Q(cfh)=N*V where N is the number of air changes and V is the volume of the building
- for crack method, Q(cfh)=LF*CFH/ft where LF is the number of linear feet of crack or joint under consideration and CFH/ft is the amount of infiltration per linear foot determined from a table that considers wind speed and window type.
- Once you have Q(cfh), the amount of heating or cooling required due to infiltration is determined by q(i)=0.018*Q(cfh)*(T(in)-T(out))
- To understand what the equation on the card is for see this thread: Infiltration- Heating load calculation
#714 Greenhouse Effect: When radiant heat in the visible spectrum passes through glass, it causes materials inside to heat up. These materials reradiate the heat in the infrared spectrum which can't pass back through the glass. The trapping of the heat is the greenhouse effect. Insolation is radiant heat gain through glass.
#715 Typical water pressure: Doesn't hurt to know some others.
- Sinks/faucets 7-10 psi
- Toilets 10-15 psi
- Urinals 15 psi
- Hose bib 30 psi
#719 Size determintation of a heating system: There's so much wrong with this card, where to begin.  First, you want to determine the total heating LOAD. While it is the sum of all the losses through the building skin, it is so much more than the U value. The total heating load consists of q(c) - loss from conduction, q(s) - loss from conduction below grade, and q(i) - loss due to infilatration. And while the U value is used in determining Q(c), you don't take the sum of all the U-values in the assembly to determine the total heat loss.
#721 Ashrae: Should be ASHRAE, all caps since it is an acronym. Also add that they proivde data and charts on building materials and assemblies for use in heat loss and heat gain calculations.
#742 Crack Method: Additional information - the other method for measuring infiltation is the air change method.
#625, #649 and #783: Study suggestion - These cards all have different components labeled with a letter that you have to identify. Feel free to write the options on the front of the card (obviously not in order). Remember, the answers will be there on the test. Therefore, you don't have to pull the answer out of the blue, you just have to select the right one. There are a couple of others like this for plumbing diagrams as well.
If anyone knows any other cards that need correcting, please add them (along with the date of your set). Maybe I'll email this list to NALSA so they can investigate changes for future updates. They also for some reason have a card in the set related to rock types (#722). I'm thinking there is a MEP question somewhere in the Materials and Methods set.  Good luck to all.
~gnr~
Last edited on Sun Aug 20th, 2006 08:41 pm by gnrbernstein
|
rienzio
Member
| Joined: | Thu Feb 2nd, 2006 |
| Location: | Golden, Colorado USA |
| Posts: | 248 |
| Exams Taken: | | | Exams Passed: | PD, GS, LF, ME, BD/MM, CD, SP, BP, BT | | Describes Me: | |
| Status: |
Offline
|
| Mana: | |
|
Posted: Sun Aug 20th, 2006 11:40 pm |
|
You should definitely e-mail NALSA. I have done that in the past. They reply and say they will revise for their next edition, but I wonder how many editions have gone by with them saying that.
At least they acknowledge us. That puts them leaps ahead of Kaplan.
|
mustardmaybe
Member
| Joined: | Tue Jun 7th, 2005 |
| Location: | ArcHitect, USA |
| Posts: | 98 |
| Exams Taken: | | | Exams Passed: | | | Describes Me: | |
| Status: |
Offline
|
| Mana: | |
|
Posted: Mon Aug 21st, 2006 07:01 pm |
|
Administrator/gnr:
This topic should be pinned or added to the ftp site. Very good information!
Thank you.
|
papaya
Member
| Joined: | Mon Jul 24th, 2006 |
| Location: | |
| Posts: | 68 |
| Exams Taken: | | | Exams Passed: | | | Describes Me: | |
| Status: |
Offline
|
| Mana: | |
|
Posted: Tue Aug 22nd, 2006 12:47 am |
|
Hi will add to your list. I found a bunch of wrong cards (and incomplete cards) too. Defintely annoying when you are studying. For example conductance (card #629)can also be in electricity, the inverse of resistance. It is an ME exam!
|
Kevin67
Architect
| Joined: | Thu Feb 17th, 2005 |
| Location: | |
| Posts: | 1002 |
| Exams Taken: | | | Exams Passed: | | | Describes Me: | |
| Status: |
Offline
|
| Mana: | |
|
Posted: Tue Aug 22nd, 2006 01:02 am |
|
Back before this forum existed and many of us were studying on the PPI site, there were several threads that included many of these same cards - as well as some others in the ME section and some infamous mistakes in other sections, such as the card about aluminum stud framing in MM... I think there is also at least one very old thread on this forum that includes mistakes in ArchiFlash cards too.
It was suggested back then that there be some kind of section on this forum, or at a least a stickied thread, for corrections of ArchiFlash cards as well as other study sources (as many mistakes as do exist in ArchiFlash, there seem to be five times as many in the ALS books in particular.)
I sent NALSA a list of many of these same cards more than two years ago. I received a nice email back, thanking me for my report, but posts here seem to indicate that the typos and incorrect definitions persist through at least two more recent editions of the cards.
Maybe continued volume of emails will help.
|
Current time is 12:23 pm | |
|
|
|
|
