* Construction Studies * Predictions, discussion and aftermath (1 thread please)

Whiskey757

Cydoniac wrote: »

Could be fireplace, door maybe? Window could be combined with roof too if that comes up, or a lean-to with a wall.
,
You should know the original dimensions, then divide those by whatever scale you're using, i.e if the base of the foundation is 900, and the scale is 1:5, you measure 180.

Oooooooh the dimensions is just the scale? That's grand.

EDIT: Right, I pretty much know all of Questions 1, 7, and 8, going back to 2006. I'm going to do a load of U value questions now, sleep, wake up early and cram some more. Be grand.

J_E

Whiskey757 wrote: »

Oooooooh the dimensions is just the scale? That's grand.

Well, the dimensions are the sizes. The scale is the size you draw. 1:5, you divide everything by 5. 1:10, you divide everything by 10.

Whiskey757

Cydoniac wrote: »

Well, the dimensions are the sizes. The scale is the size you draw. 1:5, you divide everything by 5. 1:10, you divide everything by 10.

Yeah, I getcha, cheers

J_E

http://examinations.ie/archive/markingschemes/2009/LC029ALP000EV.pdf

Is the marking scheme wrong? I keep getting an R value of 6.022 and a U value of 0.166. I have done it out 3 times now and my figures are identical. Add it on your calculator and it's wrong. Why to they have two decimal points for the cavity resistance? Ugh...

Edit: Got it in the end.

szybki

so what are the best drawings I should look at ? but please don't tell al of them as i will not cover all of them within one night !

Whiskey757

Cydoniac wrote: »

http://examinations.ie/archive/markingschemes/2009/LC029ALP000EV.pdf

Is the marking scheme wrong? I keep getting an R value of 6.022 and a U value of 0.166. I have done it out 3 times now and my figures are identical. Add it on your calculator and it's wrong. Why to they have two decimal points for the cavity resistance? Ugh...

I got the same as the marking scheme. Cavity resistance is 0.170, two decimal points must have been typo.

szybki wrote: »

so what are the best drawings I should look at ? but please don't tell al of them as i will not cover all of them within one night !

All except roof. Get up early tomorrow and study, the test isn't until 2

J_E

They won't dock you marks if your U Value is slightly different, for example if you used more or less decimal points than they did? It just seems petty to lose marks on if your calculations are right.

terryincork

Whiskey757 wrote: »

All except roof. Get up early tomorrow and study, the test isn't until 2

How sure are you to say roof isnt going to appear?

aramush

Question 1 predictions lads (and lassies)?

Whiskey757

Cydoniac wrote: »

They won't dock you marks if your U Value is slightly different, for example if you used more or less decimal points than they did? It just seems petty to lose marks on if your calculations are right.

I don't think the number of decimal places matters too much. Make it around three to be more accurate. Make sure you draw the chart thing as well because you pick up marks for each bit, whereas some people try to do the whole thing on the calculator.

terryincork wrote: »

How sure are you to say roof isnt going to appear?

Well, just because it came up last year. That's my only reason, really.

szybki

Whiskey757 wrote: »

All except roof. Get up early tomorrow and study, the test isn't until 2

Yep... but ''all '' does not help me. I'm trying to narrow number of drawings ....

What do you think bout :
1 fireplace
2 ground floor - timber + concrete
3 timber frame house and suspended timber floors
floor and door trashold
????

Whiskey757

szybki wrote: »

Yep... but all does not help me. I'm trying to narrow number of drawings ....

What do you think bout :
1 fireplace
2 ground floor - timber + concrete
3 timber frame house and suspended timber floors
floor and door trashold
????

2010 was roof
2009 was suspended timber floor
2008 was fireplace
2007 was roof
2006 was solid concrete floor with a wheelchair ramp thing

Trev on 2fm the other day predicted a return of the 2006 question because the building regulations changed this year or something, but he said to look at all the year between 2006 and 2010. So there they are. It's not that much. Although, if they don't ask one of them I'm ****ed.

szybki

WINDOW - window cill did not come up !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! fu** ... I can't do it I actualy didn't draw it at all before .... so i dont know is there point trying to learn it

Whiskey757

szybki wrote: »

WINDOW - window cill did not come up !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! fu** ... I can't do it I actualy didn't draw it at all before .... so i dont know is there point trying to learn it

Window was on 2007, with the roof. It's not that hard really, just have a few gawks at it before the test.

szybki

will try to look at it before the exam.... now i will just read my notes on passive house ,situating house in rural area , health and safety, uvalues and sound .... I hope they come up ....

J_E

Good luck everyone, hope this goes well

Gumbi

Nice paper, imo. Finished about 30 mins early. Could've done another question, but didn't bother. Mediocre drawing, the rest was good. A lot of repetition between answers, though.

J_E

It went alright for me, but in a way I wish there hadn't been a week between the last exam and this one because I found it hard to focus.

I messed up the b part of the U Value question, I was so set on an oil cost question coming up, was gutted. Still gave good attempts though.

My U Value was something like...1.52? I think

C__MC

U value answer??

kieranb1

Trev64 wrote: »

This comment is not accurate. The writer is confused. Look up the 'Acceptable Construction Details 2008'... damp proof membranes/ courses are always shown as red, airtightness membranes/ barriers are shown in blue.

You can download the ACD2008 on the department of the environment's website (www.environ.ie) or on www.constructionstudies.ie

DELIGHTED!!! it was only by chance that i had a red pencil and no blue

Griffen262

C__MC wrote: »

U value answer??

Cydoniac wrote: »

My U Value was something like...1.52? I think

Cant remember the U-value, but thickness was 113mm?..anyone? Please..:P

Stickjesus

Griffen262 wrote: »

Cant remember the U-value, but thickness was 113mm?..anyone? Please..:P

The U value I got was 1.56 I think. The thickness was definitely 113 so don't worry.

It was a fairly handy test. I'm one of the few unlucky people doing exams till friday. Damned applied maths...

Gumbi

Cydoniac wrote: »

It went alright for me, but in a way I wish there hadn't been a week between the last exam and this one because I found it hard to focus.

I messed up the b part of the U Value question, I was so set on an oil cost question coming up, was gutted. Still gave good attempts though.

My U Value was something like...1.52? I think

1.536 if I remember correctly.

Gumbi

Stickjesus wrote: »

The U value I got was 1.56 I think. The thickness was definitely 113 so don't worry.

It was a fairly handy test. I'm one of the few unlucky people doing exams till friday. Damned applied maths...

What?! I got 79mm for the thickness, which to me, sounds slightly more realistic than 113. How sure are you?

Griffen262

Gumbi wrote: »

What?! I got 79mm for the thickness, which to me, sounds slightly more realistic than 113. How sure are you?

Stickjesus wrote: »

The U value I got was 1.56 I think. The thickness was definitely 113 so don't worry.

Most people in my class got 113, and the only two people that do honours maths got something completely different from eachother!

mihaf

any one , how is par b of u-value done.

Digits

Griffen262 wrote: »

Most people in my class got 113, and the only two people that do honours maths got something completely different from eachother!

All the people that do honours maths including me, got 113 for the thickness aswell.

galwayman17..

u value 1.56 i think i got and thickness i got was 113 which was what most the peope in my class got.

Gumbi

This makes me sad, considering how much time I could've used to check the answer

kahf1_01

When I opened the paper and read it, I couldn't believe how easy it was. everything I had studied came up, energy, sound, environment, and door. I started out with the U-value question, which was fine. The B part I think you had to do this: they gave you the K value and the U value, to find T you use R = T/k . . . but you need R, to get R you use the fact that U = 1/R put in the U value then you get R, once you have R put it back into R = T/k . That's how I got T, it turns out to be 137 when you multiply by 1000 to change it to m's and rounded off.

RHunce

My thickness was 113.. as was everyone elses in my class who did hons maths

C__

113mm i got

kahf1_01

how'd you get that?

Matthew_drog

It wouldnt really matter if I said 0.113m instead of 113mm? I personally think it was a handy enough exam, lets wait and see

RHunce

kahf1_01 wrote: »

how'd you get that?

Rt of part A was 0.64

Conductivity of polystyrene was 0.037.
Resistivity of it was 1/0.037 = 27.03
Let Thickness = Y
Resistance of polystyrene = Y(27.03)

Add it to the existing resistance.

0.64 + Y(20.03) = new Rt

U = 1/Rt

0.27 = 1/[0.64+Y(27.03)]

0.27 x [0.64+Y(27.03)] = 1

0.1728 + Y7.2981 = 1

Y7.2891 = 0.8272

Y = 0.8272/7.2891

Y = 0.1134

Y = Thickness = 113mm

DM360

Absolutely beautiful exam paper, never been more pleased.
I did about 3 hours study the night before, mainly looking at constructionstudies.ie, and everything came up!

Happy with every questions. Got U-value=1.56 and thickness=113mm, as did all the other HL Maths lads. Passive housing was a great question