GEBOUDIENSTE 112 /BUILDING SERVICES 112 VRAAG 1 / QUESTION 1 [8]

Size: px

Start display at page:

Download "GEBOUDIENSTE 112 /BUILDING SERVICES 112 VRAAG 1 / QUESTION 1 [8]"

Flora Atkinson
7 years ago
Views:

1 GEBOUDIENSTE 112 /BUILDING SERVICES 112 SEMESTER TEST 1 / SEMESTER TOETS 1 MEMO 2013 VRAAG 1 / QUESTION 1 [8] By means of ONE full sketch, describe in full the ways in which water traps can be destroyed other than evaporation and back pressure. Beskryf aan die hand van EEN volledige skets, die maniere waarop water slotte gebreek kan word, buiten verdamping en teendruk. 1

2 VRAAG 2 / QUESTION 2 [15] Discuss and sketch in full, what a sovent system is and when you will make use of it? What alternative to the use of this system can you suggest? Bespreek en illustreer volledig wat n belugter-stelsel is en wanneer jy een sal gebruik? Watter alternatief tot die gebruik van hierdie stelsel, sal jy voorstel? Dit is n enkel stampyp stelsel (1) waar die vloei kapasiteit van die stampyp verhoog word met n SPESIALE ONTLUGTER ONDERDEEL by die verbinding van sytakke met die stampyp (1) Dit laat ons toe om kleiner stampype te gebruik en elimineer addisionele stampyp ontlugter behoeftes (1) Die sy-takke is ontwerp om te werk sonder teenheuwelwerkende pype (1) Vorming van water-proppe in die stampyp vanaf sy-takke te voorkom (1) Dit vermeng die vuilwater vloei vanaf sy-tak met water/lug vloei reeds in stampyp (1) Beperk die vloei-druk of velocity van vloeistowwe en lug in die stampyp (1) Verseker die ontlugter aksie van sy-takke (1) Voorkom spatwater/skuim in sy-takke (1) Sovent -stampyp het goeie druk eienskappe (1) Sy-takke benodig goeie ontwerp om self-heuwelwerking te voorkom (1) 2

3 Die sovent -stelsel is voordelig as meer as 10 verdieping gebou is, a.g.v. die koste van die belugter onderdeel (1) Baie maklik as dieselfde uitleg herhaal word (1) It is a single stack system (1) where the flow capacity of the stack is increased by SPECIAL AERATOR FITTING at the junction of the branches with the stack. (1) Allows to use smaller stacks & eliminates suppl. stack venting needs (1) The branches designed to work without anti-siphonage pipes. (1) Prevent formation of a plug of water in the stack from the branch (1) Mixes the waste flow from branch with water/air flow in stack (1) Limits velocity of liquid & air in the stack (1) Ensures venting action of branches (1) Avoid splash water / foam in branches (1) Sovent stack has excellent pressure characteristics,(1) Branches NEEDS careful design, preventing self-siphonage (1) The sovent system is more advantageous > 10 storeys - due to cost of aerator fittings (1) Easy when the same layout is repeated (1) VRAAG 3 / QUESTION 3 [12] 3.1 Identify the pipe system as per the photo 3.2 Describe the system in full 3.3 Is this system still in use in industry today? 3.1 Identifiseer die pypstelsel soos op die foto 3.2 Beskryf die stelsel volledig 3.3 Word die stelsel vandag nog in die industrie gebruik? 3.1 Enkel-stam stelsel / Single stack [1] 3.2 Die Enkel Stampyp Stelsel = Een-pyp Stelsel maar sonder ontlugters vir elke toebehoor [1] Die individuele sperders is ongeventileerd + die 1 stampyp dien as beide hoof-afvoer en ontlugter component [1] Groot besparings in pypwerk + skag spasie + blootstelling & vermy estetiese onooglikheid [1] Word deur die Nasionale Bou Regulasies vir residensiële & kantoorgeboue toegelaat [1] Wanneer ontwerp limiete van die enkel stampyp sisteem oorskry word [1] 3

4 By residensiële eiendom, word elke individuele toebehoor direk verbind met stampyp met geen gemeenskaplike sy-tak pyp of teen-heuwelwerking pype nie [2] n Stampyp mag n addisionele ( supplementary ) ontlugter benodig met hoë geboue selfs op 2de vloer [1] Met kantoorblokke, word dieselfde toebehore gekoppel aan die stampyp d.m.v. n gemeenskaplike sy-tak pyp [1] Daar is beperkinge tot die hoeveelheid toebehore aan n gemeenskaplike sy-tak: Geen teen-heuwelwerking pype nie [1] n Addisionele ontlugter mag benodig word, afhangend van die aantal toebehore en die stampyp diameter [1] 3.2 The Single Stack System=One-Pipe System without vents. [1] The individual traps are unvented + the 1 stack serves as both main discharge and ventilating component. [1] Great Savings in Pipe Work + duct space + less exposed & unsightly [1] When design limits of single stack system exceeds, use onepipe system. [1] With residential, each ind. appl. Is directly connected to stack with no common branch pipes or anti-siphonage pipes. [2] The stack may require a supplementary vent at high rise buildings [1] With office buildings, appliances of the same type are connected to the stack via common branch pipe. [1] There are limitations to the # of appl.on common branch. - No anti-siphon pipes [1] Suppl stack vent may be required, depending on # of appl & stack diameter [1] 3.3 JA / YES [1] 4

VRAAG 4 / QUESTION 4 [15] It was thought that only drainage of water closets constitutes a health hazard. (1) They separated the soil and waste water in two-pipe system. (1) Upper floor soil appl.

5 VRAAG 4 / QUESTION 4 [15] It was thought that only drainage of water closets constitutes a health hazard. (1) They separated the soil and waste water in two-pipe system. (1) Upper floor soil appl. discharge into separate soil stack connected directly to underground drains. (1) Waste water appl discharge into separate waste stack, discharging to a trapped gully connected to underground drains. (1) The gully acts as a seal against odours rising from foul water drain into waste stack. (1) All traps are vented against siphonage (1) The stack may be provided with a relief vent, below the branch pipe to the lowest appl. (1) To relief back pressure at bend at the base of stack where it connects with horizontal underground pipe/drain. (1) Very expensive system (1) Sketch (6) 5

6 VRAAG 5 / QUESTION 5 [10] 5.1 A discharge stack carries liquid effluent and a vent stack carries air to ensure pressure fluctuations are minimised in the drainage system. (2) 5.2 The water seals have evaporated in the toilets. (2) If the gully seal had failed the smell would be outside. Flush the toilets and the water seals will be restored. (1) 5.3 Waste & Soil water (solids and fluids), be carried away, quickly, quietly, without blockage and without foul air escaping into the building. (3) 5.4 True (1) 5.5 False (1) TOTAAL 60 / TOTAL 60 6

Vermenigvuldig en Afdeling (Intermediêre fase)

Vermenigvuldig en Afdeling (Intermediêre fase) My Huiswerk Boek(4) Naam: Jaar: Skool: Declaration This booklet is not sold or used for profit making. It is used solely for educational purposes. You may