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RAINWATER PIPES
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rainwater piping shall not be used as...
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BU 1 FINALS
| Question | Answer |
|---|---|
| RAINWATER PIPES | downspouts or conductor pipes, gutter, roof drains |
| rainwater piping shall not be used as... | soil, waste and vent pipes |
| downspout and gutter sizes are based upon the... | maximum depth of rainfall per hour falling upon a given roof area in square meters |
| average of rainfall intensity used around metro manila | 102mm/hr |
| shapes of rainwater pipes may be used for downspouts | round, square, rectangular |
| Downspouts for high-rise buildings shall be of stronger pipe materials to resist the... | high hydrostatic pressure |
| downspouts for high-rise buildings shall be installed within a... | a pipe chase, and have no intermediate branch from the roof to the ground level. |
| roof drains shall be equipped with (blank) strainers extending 102mm above the surface of the roof surface | dome type |
| roof drains has a minimum total net inlet area of (blank) times the area of the outlet pipe to which it is connected | 1 to 1/2 |
| roof drains passing through building interiors shall be made watertight by the use of... | c.i. drain |
| 3 major systems of collecting storm water | independent system, combined system, natural system |
| also known as the separate system | independent system |
| brings collected water directly to the water reservoirs | independent sytem |
| combines storm water with sanitary waste | combined syst em |
| without using any roof gutters or downspouts | natural system |
| when rainwater is collected in cisterns | natural system |
| roofing elements to collect rainwater | gutter, downspout, strianer or roof drain, the shoe, the catch basin, the storm line |
| usually located along the entire perimeter of the roof | gutter |
| located every 8 to 10 meters and at every corner of the roof | downspout |
| it is also best to locate them evvery 4 to 6 meters to avoid clogging of pipes | downspout |
| it is designed to receive water collecting on the surface of a roof and to discharge it into a downspout | strainer or roof drain |
| designed to prevent clogging | strainer or roof drain |
| at the bottom of the roof leader to direct rain water towards the nearest catch basin | the shoe |
| downspouts should terminate in it | catch basin |
| it delivers water to the sewers in the street via gravity | catch basin |
| it also collects surface water | area drain catch basin |
| connects to each catch basin | storm line |
| carries only rainwater collected from the storm drain or from the streets | storm water |
| terminates at natural drainage areas | storm water |
| natural drainage areas | lakes, rivers, and water reservoirs |
| storm sewer require manholes to serve as... | clean outs and to make sewers accessible for inspection and repair |
| storm sewer is built at depths of about (blank); diameter randing from (blank) | depths 2 to 3 meters; diameter ranging from 0.6 to 1.2 meters |
| review the commercial/industrial special liquid waste disposal system requirements | page 221 |
| review the location of sewage disposal system | page 221 |
| features of sewage treatment plan | An aeration system within the tank, A submersible mixer to mix the waste, A sludge waste pump that aids in clarifying, A decanter, Blowers, A fully electronic control system. |
| 2 most common types of municipal sewage treatment | the activated sludge process, the trickling process |
| Involves a series of stations where the raw sewage must pass through | the activated sludge process |
| the activated sludge process phases | first phase, second phase, third phase |
| the activated sludge process phases wherein it gets rid of heavy materials with the use of three different filter houses | first phase |
| the activated sludge process phases wherein it clarifies the effluent | second phase |
| the activated sludge process phases wherein it hardens the sludge and converts it to fertilizers | third phase |
| Produces water with 99 | 99.5% purit |
| a.k.a 'Percolating or Sprinkling Filter System' | THE TRICKLING PROCESS |
| Requires less mechanical elements and less stages | THE TRICKLING PROCESS |
| Produces water with 95% purity | THE TRICKLING PROCESS |
| Requires a large ground area for its building | THE TRICKLING PROCESS |
| components of fire protection system | standpipes, outlets, pump, fire hose cabinet, elevated water tank, underground water reservoir |
| Water is pumped up to it and preserved for emergency uses | elevated water tank |
| It should not be connected to the water distribution line of the building | elevated water tank |
| A cistern | underground water reservoir |
| Water is usually provided from the main water line, But sometimes collected rain | underground water reservoir |
| TYPES OF STANDPIPES FOR FIRE PROTECTION SYSTEM | dry standpipes, wet standpipes, wet standpipes with siamese connection, combination |
| No longer being utilized in new buildings, provided other systems are employed (otherwise must be installed in buildings 4 levels or more) | dry standpipes |
| a pipe installed in buildings not as part of the water supply or waste disposal system but primarily for use as water conveyor in case of fire | standpipe |
| A standpipe is connected to the exterior of the building via fire department connections. (max height= 1220mm) | working principle of dry standpipes |
| types of dry standpipes | DRY STANDPIPE WITH AUTOMATIC DRY PIPE VALVE, DRY STANDPIPE WITH MANUAL CONTROL VALVE, DRY STANDPIPE WITH NO PERMANENT WATER SUPPLY |
| No water under normal conditions, With pressurized air, Water comes in via public utility connection | DRY STANDPIPE WITH AUTOMATIC DRY PIPE VALVE |
| Dry pipe valve is designed to open when there is air pressure drop in the system | DRY STANDPIPE WITH AUTOMATIC DRY PIPE VALVE |
| No water under normal conditions, Water enters after opening of manual valve, Water comes in via public utility | DRY STANDPIPE WITH MANUAL CONTROL VALVE |
| Water is pumped into the system by the fire department | DRY STANDPIPE WITH NO PERMANENT WATER SUPPLY |
| Most common dry standpipe | DRY STANDPIPE WITH NO PERMANENT WATER SUPPLY |
| A piping network (line is directly connected to the main water line) connects to all levels of a building (at least 1 standpipe outlet on each level) | working principle of wet standpipes |
| The number of wet standpipes shall be determined so that all portions of the building are within... | 6 meter of a nozzle attached to a hose 23 meters long |
| Wet standpipes shall be constructed of... | wrought iron or galvanized steel |
| it is located outside the building for additional water supply (connects to fire truck hose) | Siamese Connection |
| The minimum diameter for a wet standpipe is (blank) for those less than 15 meters from the fire service connection | 51mm (For those more than 15 meters from the fire service connection, the minimum diameter is 64mm) |
| TWO TYPES OF SPRINKLERS SYSTEMS | AUTOMATIC WET, AUTOMATIC DRY |
| Lines are constantly filled with water | AUTOMATIC WET |
| Valves and censors trigger the water to fill up the lines at the slightest hint of fire 25 gals. Per minute/ 1 sprinkler head | AUTOMATIC DRY |
| TYPES OF SPRINKLER HEADS | UPRIGHT, PENDENT, SIDE THROW/ SIDE WALL |
| use above piping when piping is exposed; this type is safer against damage | UPRIGHT |
| projects through a finished ceiling when piping is concealed | PENDENT |
| SPACING OF SPRINKLER HEADS (Branch) | 15 feet |
| SPACING OF SPRINKLER HEADS (Heads) | 4 to 10 feet |
| SPACING OF SPRINKLER HEADS (From wall) | 4 inches |
| LIGHT HAZARD OCCUPANCY (Coverage of one sprinkler head) | 20sqm |
| EXTRA HAZARD OCCUPANCY (Coverage of one sprinkler head) | 10sqm |
| ALTERNATIVE FIRE SUPPRESSION SYSTEM | CLEAN AGENT GAS FSS, CARBON DIOXIDE FFS, FOAM FFS, KITCHEN FFS |
| discharges inert gas (halon) on the surface of combusting materials | CLEAN AGENT GAS FSS |
| consists of cylinders of agents, heat/smoke detectors, piping and discharge nozzles | CLEAN AGENT GAS FSS |
| doesn't leave any residue but do little harm to firefighters, occupants and equipment | CLEAN AGENT GAS FSS |
| alternative to Halon: FM200 (heptaflouropropane), FE | 13 (Triflouromethane), NERGEN (mixture of nitrogen, argon and carbon) |
| discharge carbon dioxide gas that extinguishes fire by displacing oxygen or taking oxygen away from the fire | CARBON DIOXIDE FFS |
| consists of cylinders of agents, heat/smoke detectors, piping and discharge nozzles | CARBON DIOXIDE FFS |
| can't be used with occupants being present | CARBON DIOXIDE FFS |
| discharge a high volume of gas filled bubbles that rapidly fills the space; bubbles float on the surface | FOAM FFS |
| consists of foam generators, heat/smoke detectors and a blower system that distributes the foam | FOAM FFS |
| When liquid wastes containing excessive amounts of grease, garbage, flammable wastes, sand, or other ingredients which may affect the operation of a private sewage disposal system, an interceptor for such waste shall be installed. | COMMERCIAL/INDUSTRIAL SPECIAL LIQUID WASTE DISPOSAL SYSTEM REQUIREMENTS |
| Waste from interceptors may be discharged to a septic tank or other primary system or into a separate disposal system | DISPOSAL |
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