I called Dr Yehia for these questions....

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I called Dr Yehia for these questions....

Post by amelsakka on Fri 02 Jan 2009, 5:31 pm

I called dr Yehia now to ask him about the following questions:

A) Sheet 2:
1) use the general equation: Pn = Po * (1 +i/100)^n
2) use the consumption increase rate equation: I = (1 + i/10)^n - 1

B) Sheet 3:
In line B: use different slope for each pipe (as I did in the excel file)
In general steps of calculating I.L: DO NOT GO BACK AND CHANGE I.L OF PREVIOUS MANHOLES, whatever happens.

I will modify the steps of longitudinal section and upload it again

By the way, all steps I uploaded are right, but dr Yehia told me that we are not supposed to work with this accuracy in tomorrow's exam Smile
Engineer Eman explained lot of correct details in the last section (which were all mentioned in the steps document), but we will only be asked to do the minimum basic steps ONLY

BASIC STEPS
http://civil2009.forum-motion.com/networks-hydraulics-f26/longitudinal-section-steps-sheet-3-modified-t1361.htm


Last edited by amelsakka on Fri 02 Jan 2009, 7:59 pm; edited 1 time in total
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Re: I called Dr Yehia for these questions....

Post by Mana on Fri 02 Jan 2009, 5:48 pm

Thx Ya Ahmed ...bs 3ayza afhm y3ny eh
amelsakka wrote:By the way, all steps I uploaded are right, but dr Yehia told me that we are not supposed to work with this accuracy in tomorrow's exam Smile
Engineer Eman explained lot of correct details in the last section (which were all mentioned in the steps document), but we will only be asked to do the minimum basic steps ONLY
zay eh masln el min basic Very Happy:D:D
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Re: I called Dr Yehia for these questions....

Post by kujo on Fri 02 Jan 2009, 6:07 pm

inorder to get RCn , RCn = RCo * I ??

Qavg at target year = RCn *Pn

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Re: I called Dr Yehia for these questions....

Post by kujo on Fri 02 Jan 2009, 6:10 pm

and when using i in the above equation its in percentage ?
like i=2%
i use it in I equation as 2 or 0.02 ?

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Re: I called Dr Yehia for these questions....

Post by engy on Fri 02 Jan 2009, 6:25 pm

so RCn= I*RCo or is it RCn = ( 1+I)^n * RCo ????

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Re: I called Dr Yehia for these questions....

Post by amelsakka on Fri 02 Jan 2009, 6:32 pm

engy wrote:so RCn= I*RCo or is it RCn = ( 1+I)^n * RCo ????

That was the same question I just asked the dr now Smile
He said,, RCn= I*RCo
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Re: I called Dr Yehia for these questions....

Post by bob on Fri 02 Jan 2009, 6:58 pm

tab 2zay Very Happy eza kan I=0.01 msln yb2a lma ngeb RCn htb2a asghar wla eh??

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Re: I called Dr Yehia for these questions....

Post by amelsakka on Fri 02 Jan 2009, 7:29 pm

bob wrote:tab 2zay :D eza kan I=0.01 msln yb2a lma ngeb RCn htb2a asghar wla eh??

Of course add 1 first.
Then let's make it: RCn= (1+ I) *RCo
Or you can calculate I without subtracting 1.
:)

Wla tez3al :)
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Re: I called Dr Yehia for these questions....

Post by amelsakka on Fri 02 Jan 2009, 7:59 pm

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