ADSL and CATV: High-Speed Internet Technologies
Dedicated Access Lines and Terrestrial Communications
Dedicated access lines are lines that are active at any time, providing an “always online” solution with permanently available transmission capacity.
Characteristics of Terrestrial Communications Networks
ADSL over ISDN and PSTN, implemented in our country, allows for the expansion of bandwidth, access speed, and the number of services. Another major form of terrestrial communication is via the networks of cable operators, initially used for cable
Read MorePhilippine Festivals, Islamic Traditions, and Woodworking
Philippine Festivals
Ati-Atihan (3rd week of January, Kalibo, Aklan)
One of the most religious celebrations in the Philippines. A parade of face-painted celebrants in costumes, with tribal dance and drum beats. Also known as the “Filipino Mardi Gras.”
Masskara (19th of October, Bacolod)
“Mass” means crowd and “Kara” means face. Celebrated with smiling masks and face paint, showcasing the title “City of Smiles.”
Sinulog (3rd week of January, Cebu City)
One of the most attended festivals by locals and tourists.
Understanding Corrosion and Pipe Materials in Plumbing
Corrosion in Plumbing
Corrosion is an irreversible process of degradation affecting the properties of metals and alloys. It impacts all installations made with metal materials.
Types of Corrosion
- Chemical Action: Occurs without an external driving force or electromotive force.
- Purely Chemical Action
- Biochemical Action
External Corrosion
The endurance of piping against external corrosion depends on humidity and certain aggressive building materials like mortar and plaster.
Internal Corrosion
The aggressiveness
Read MoreDisc and Drum Brake Inspection and Maintenance
Disc Brake Verification
Operation is checked by observing whether the pedal displacement causes the correct movement of the caliper. If not, remove it and repair it. Verify that there are no fluid leaks in the actuator or the hose union. Check the condition of the disc and pads. The pads should be replaced if they are defective. The process of disassembling the pads depends on the brake thickness. The brake pads should be superior to 2mm. When some are defective, all of the pads on the same axle
Read MoreSteam Production and Distribution in Industrial Settings
Steam Production and Distribution
A system of steam production and distribution generally consists of the following items:
- One or more boilers that can burn coal, fuel oil, gas, etc. In industry, fuel oil is often used as fuel.
- The water used must meet certain requirements, according to the rules, requiring the installation of a treatment plant.
- Once treated, the water must pass through a degasser, which removes oxygen and combustible gases.
- Feed pumps are responsible for bringing water from the degasser
Electronic Circuits, Modems, and Analog-Digital Conversion
Unit 8: Switches and Their Functionality
A switch is a device that can be used to either establish or remove (also called make or break) connections between at least two points in an electric or electronic circuit. The mechanical or electromechanical parts which help the contacts to physically touch and separate are called actuators. A switch can be considered to be a gate which either allows or disallows a certain entity.
Key Components and Properties of Switches
- Actuators: The component that helps