GEBOUDIENSTE 112 / BUILDING SERVICES 112 (GBD112) JUNIE 2012 EKSAMEN/JUNE 2012 EXAM

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1 UNIVERSITEIT VAN PRETORIA UNIVERSITY OF PRETORIA FAKULTEIT INGENIEURSWESE, BOU-OMGEWING EN INLIGTINGTEGNOLOGIE FACULTY OF ENGINEERING, BUILT ENVIRONMENT AND INFORMATION TECHNOLOGY DEPARTEMENT KONSTRUKSIE-EKONOMIE DEPARTMENT OF CONSTRUCTION ECONOMICS GEBOUDIENSTE 112 / BUILDING SERVICES 112 (GBD112) Eksterne eksaminator/external Examiner: Interne eksaminatore/internal Examiners: Mr J Potgieter Mr J Chindedza Mr D Booyens JUNIE 2012 EKSAMEN/JUNE 2012 EXAM DATUM/DATE: JUNIE / JUNE 2012 TOTALE PUNTE/TOTAL MARKS: 100 TYD/TIME: 120 min LEES: BELANGRIKE NOTAS maak seker jou naam en studente nommer is op die antwoordboek(e) dui aan hoeveel boeke ingedien word en maak seker die boeke word behoorlik gemerk MERK OP DIE ANTWOORDBOEK DIE VOLGORDE WAARIN DIE VRAE BEANTWOORD IS en a vir afrikaans aan die bo-kant van die antwoordboek Skryf altyd alles in blou of swart pen sketse kan met potlood gedoen word TREK ASB. N LYN NA ELKE VRAAG BEANTWOORD GEEN NOTAS OF SKETSE MAG OP DIE VRAESTEL GEMAAK WORD NIE ALLE SKETSE OF MERKE MOET IN DIE ANTWOORDBOEK GEDOEN WORD GEEN SKRYFBEHOEFTES/SAKREKENAARS MAG tussen studente GEDEEL WORD NIE Skryf asseblief leesbaar as dit nie gelees kan word nie, kan dit nie gemerk word nie ANTWOORD ALTYD PUNTSGEWYS READ: IMPORTANT NOTES ensure your name and student number appear on the answer book(s) indicate the number of answer books handed in and ensure they are properly marked INDICATE ON THE ANSWER BOOK THE ORDER IN WHICH QUESTIONS WERE ANSWERED and e for English at the top of the answer book Always answer everything in blue or black pen sketches can be done in pencil PLEASE DRAW A LINE AFTER EACH QUESTION ANSWERED NO NOTES OR SKETCHES MAY BE MADE ON THE QUESTION PAPER ALL SKETCHES OR NOTES MUST BE MADE IN THE ANSWER BOOK ONLY NO STATIONARY/CALCULATORS MAY BE EXCHANGED BETWEEN STUDENTS Please write legibly if it can t be read, it can t be scored ALWAYS ANSWER IN BULLET FORM 1

2 VRAAG 1 / QUESTION 1 [18] 1.1 Identifiseer die volgende tipe pyp-stelsel soos per Fig.1 van n dubbelverdieping staatshospitaal. [1] 1.2 Beskryf die stelsel volledig. [10] 1.3 Word die tipe stelsel vandag nog in die bedryf gebruik? Motiveer. [2] 1.4 Her-ontwerp die stelsel deur dit oor te teken in die antwoordboek, sodat dit meer ekonomies en esteties aanvaarbaar is. Beskryf volledig. [5] 1.1 Identify the following type of pipe system as per Fig. 1 of a double storey state hospital. [1] 1.2 Describe the system in full. [10] 1.3 Is this type of system still in use today in industry? Motivate. [2] 1.4 Re-design the system by re-drawing it in the answer book so that it is more economical and aesthetically acceptable. Describe in full. [5] Fig. 1 2

3 VRAAG 2 / QUESTION 2 [17] Antwoord slegs WAAR of VALS of gee die ontbrekende woorde as jou antwoord: 2.1 Die hidroliese sprong vind plaas tydens suig-heuwelwerking. 2.2 Lang radius buigstukke vertraag hidroliese werking in pype. 2.3 Die aansluiting van n individuele teen-heuwerking waterslot ventilasiepyp tot by die kroon van n drekwater-toebehoor se waterslot word mm vanaf die kroon hoogte gemaak. 2.4 Die enkelstam-stelsel word beperk tot 30 vloere vir residensiële geboue en 24 vloere vir kommersiële geboue. 2.5 Die ingiet van swaardiens-gietysterpype in n 100mm beton bedding onder geboue moet as moderne praktyk bevorder word. 2.6 Waterkloset sytakke moet teen... grade na die stam aansluit. Draaiaansluitings moet n draai-radius van... mm in die rigting van die vloei hê. 2.7 Die takpyp wat n battery van waterklosette bedien moet minstens... mm lank wees en verkieslik nie... bevat nie. 2.8 Die diameter van die takpyp wat n groep urinale bedien moet minstens... mm lank wees vir kanaal-tipe en... mm vir muur-gemonteerde tipe. 2.9 n Steekoog is nie dieselfde as n toegangsoog nie aangesien beide nie van die ondergrondse pyp na die grondvlak geneem word nie PVC-pype het nie gladde binne-oppervlaktes nie en verhinder dus die vloei van water Hulse kan kleiner wees in diameter as die pyp waarvoor daar voorsiening gemaak word om sodoende geld te bespaar. Answer TRUE or FALSE or write the missing words only as your answer. 2.1 The hydraulic jump takes place during induced siphonage. 2.2 Long radius bends hinder hydraulic performance in pipework. 2.3 The connection of an individual anti-siphonage trap vent pipe to the crown of the trap of a soil or waste appliance is done 75 to 750 from crown of the trap. 2.4 The single stack system is restricted to 30 floors for residential buildings and 24 floors for commercial buildings. 2.5 The casting of heavy duty cast iron pipes in a 100 mm bed of concrete under buildings is a modern practice to be encouraged. 2.6 Water closet branches should have entries swept. degrees into the stack. Swept entries should have a sweep radius of.. mm in the direction of flow. 2.7 The branch pipe serving a battery of water closets should be. mm and should preferably not contain 2.8 The diameter of the branch pipe serving urinals should be. mm for channel type urinals and. mm for wall mounted ones (bowl type) 2.9 A rodding eye is not the same as the access eye as both do not continue to the surface from the underground pipe PVC drain pipes do not have a smooth inner surface and therefore negatively affect the flow of water. 3

4 2.11 Sleeves can be of smaller diameter than the pipe to go through them in order to save money. VRAAG 3 / QUESTION 3 [58] Jy is die Projekbestuurder vir n nuwe spoghuis op n wildsplaas 70km buite Kimberley. Omdat daar geen munisipale riolering is om die gebou se afvalwater te ontvang nie, moet daar van n septiesetenk en suipelput-stelsel gebruik gemaak word. 3.1 Verduidelik aan jou kliënt die werking [10] van so n stelsel deur van volledige sketse [15] gebruik te maak. [25] 3.2 Waar en wanneer mag hierdie stelsels gebruik word? [5] 3.3 Die kliënt wil ook gebruik maak van n aparte pypstelsel in terme van die afvoer na die tenk toe. Verduidelik volledig watter stelsels bestaan om sodoende die verskil te verduidelik. [7] 3.4 Die plaaswerkers se huise moet toilette kry. Elke huis moet van n puttoilet voorsien word. Verduidelik aan jou kliënt hoe n puttoilet werk. [5] 3.5 Beskryf volledig die druktoets wat die stadsraad op die perseeldrein sal uitvoer. Brei uit deur sketse te maak. [10] 3.6 Voorsien volledige byskrifte vir A-F in Fig. 2. [6] You are the Project Manager for the construction of an upmarket house on a game farm 70km outside of Kimberley. Because there is no existing municipal sewer connection to receive waste water, a septic tank and French drain system will have to be implemented. 3.1 Explain to your client the working [10] of a system like this by making full sketches [15]. [25] 3.2 Where and when is the use of septic tanks allowed? [5] 3.3 The client wants to make use of a separate pipe system in terms of the discharge to the tank. Explain in full which systems are available to clearly show the difference between them. [7] 3.4 The farm workers houses need to have toilets. Each house must be provided with a pit latrine. Explain to your client how a pit latrine works. [5] 3.5 Describe in full, the pressure-test that the council will conduct on the site drain. Elaborate by making sketches. [10] 3.6 Label A-F in Fig. 2 in full. [6] 4

5 E F D C B A Fig. 2 VRAAG 4 / QUESTION 4 [10] As projekbestuurder van Fasiliteitebestuur aan die Universiteit van Pretoria moet jy verslag gee aan bestuur oor die faling van dreinpyp-stelsels as gevolg van kragte wat daarop inwerk. Noem en beskryf kortliks die bykomende kragte wat algemeen op ondergrondsepype inwerk anders as sloot terugvulling. As project manager in Facilities Management at the University of Pretoria you are supposed to give a report to management on the failure of drain pipe systems due to stresses imposed on them. State and briefly describe the additional sources of stress that commonly occur on pipework below ground other than just the backfill in the trench. TOTAAL / TOTAL:100 5