Midterms Plumbing Q2

it is a water-tight receptacle which receives the discharge of sanitary plumbing system.

Septic Tank

a material floating on the surface of septic tank. Scum usually contains fats, oil, grease.

Scum

it is the “sinkable” solids (soil, grits, bones, unconsumed food particles) that settle to the bottom of the tank and form a sludge layer

Sludge

it is the clarified wastewater left over after the scum has floated to the top and the sludge has settle to the bottom. It

flows through the septic tank outlet into the drain field.

Effluent

Explain the disgestion process of the septic tank

The sludge accommodate the bottom of the septic tank. Parts of solid form into floating scum. Both processed by anaerobic bacteria and transform into liquid and gas

3 bacteria that help decompose the organic matter from human waste

- Aerobic Bacteria

- Facultative Bacteria

- Anaerobic Bacteri

2 process inside the septic tank

Sedimentation in the upper part of the tank.

Anaerobic Decomposition at the bottom

a principal component of natural gas

Methane Gas (CH4)

simplest oxide of cardon

Carbon Dioxide (CO2)

by-product of methane classified as poisonous gas

Carbon Monoxide (CO)

evolves as a moist gas from organic waste.

Hydrogen (H2)

colorless gas with offensive odor

Hydrogen Sulfide (H2S)

colorless with irritating odor

Sulfur Dioxide (HO2)

digestive chamber minimum length

1500 mm

septic tank minimum inside width

900 mm

minimum septic tank air space

228.6 mm

septic tank minimum and maximum liquid depth

600 mm to 1800 mm

If the septic tank is over 6 cubic meters, the minimum length of the secondary compartment shall be ____

1500 mm

septic tank minimum quantity and manhole dimension

Minimum of 2 with minimum dimension of 508mm x 508 mm

No septic tank shall be constructed or installed _____ ___ _____ a house.

Within or under

A septic tank may be pumped out every

2 to 5 years

3 types of elevators

- Hydraulic Elevator

- Geared and Gearless Traction Elevator with Machine Room

- Machine Room Less (MRL) Elevator

3 types of Hydraulic Elevator

- Conventional Hydraulic Elevator

- Hole Less Hydraulic Elevator

- Roped Hydraulic Elevator

Give 5 controls of Elevator

Call Button

Hold Button

Alarm Button or Switch

Stop switch

Security Camera

Give 5 Uses of Elevators

-Aircarft Elevator

- Freight Elevator

- Residential Elevator

- Vehicle Elevator

- Boat Elevator

Counterweight

Governor

Traveling Cables