Notes, summaries, assignments, exams, and problems for Vocational training

Hydrants and Equipment

Hydrants are equipped with essential firefighting tools, primarily hoses. These hoses connect to a pressurized water network, providing a constant water supply for initial fire suppression. Key components include:

1. Hose
2. Valve Connection
3. Support
4. Nozzle Connector (connects the hose to the nozzle tip)
5. Nozzle (directs, regulates, and controls water flow)

Hydrants: External Fire Prevention

Hydrants form part of the fixed fire prevention system. They are located outside buildings and connect to the water supply network through independent conduits. Hydrants are exclusively for firefighter use.

Fire in Electrical Installations

Source of Electrical Fires: Overcharge, voltage spikes, short circuits, and defective equipment.

Causes: Poorly... Continue reading "Fire Prevention: Hydrants, Electrical Safety, and Signals" »

Types of Support and Channels

Wireless support's atmosphere is leading to it being transmitted through electromagnetic waves and sound. Wired support uses some sort of cable, such as coaxial cable or fiber optics.

Channels

Channels are real-time media communication that allows the same instant. Time media are those media differed in the signal sent by the sender is stored in any information recording system, such as magnetic tapes, CDs, and DVDs.

Codes

Communication codes are legion: the languages of mankind, color codes, writing, and language.

Parameters

• Amplitude: The maximum variation of the signal about the value zero.
• Period: The time lag between two consecutive steps by maximum wave value.
• Frequency: The number of oscillations that occur during

Plato's Philosopher-King

The Ideal City

For Plato, the philosopher-king is essential for a just society. In The Republic, he presents a hierarchical society divided into three groups:

• Craftsmen: Provide resources like food through productive work.
• Guardians/Warriors: Defend the city from internal and external threats. This class is crucial as it produces the leaders, who are the best guardians. They live a distinct life, without private property, family, or typical housing, and women marry within their class.
• Philosophers: Rule the state. Plato believed philosophers, possessing knowledge of ideas and reality, are best suited to govern. These leaders are selected based on physical and psychological excellence.

Plato's ideal city is founded on... Continue reading "Plato's Philosopher-King & Aristotle's Substance" »

Principal Components of Iron-Carbon Alloys

The main components of iron-carbon alloys include:

• Perlite: Thin films formed with ferrite (light gray) and cementite (dark gray). Carbon content is 0.89%. Ferrite is softer, while cementite is harder.
• Ferrite: Almost pure iron, very soft, ductile, and magnetic. Its structure is cubic.
• Cementite: Located on the right side of the eutectoid point due to its carbon composition (Fe3C). It is the hardest and most fragile constituent of steel.
• Austenite
• Martensite
• Ledeburite: Consisting of cementite and austenite.

Thermal Treatments for Steel

Thermal treatments modify the properties of steel:

• Tempering: Increases hardness, toughness, and yield strength, but also increases fragility. Methods include immersion in water,

Classification of the Sources of Financing

Funding is used to obtain financial resources (money) to cope with the expenses and investments that the company needs to develop its activity. While selecting the most appropriate financing instruments, the cost, time, and purpose will be taken into account.

Two Types of Financing

Own Funding (Net)

Own funding sources belong to the company or its owners.

Advantages: No cost to the company.

Disadvantages: No sharing of profits or dividends, or reservations.

• Resources obtained: Profits.
• Grants: Funds received from public agencies and private losses.
• Enrichment of self: The distribution of reserves.
• Autofinancing maintenance: The funding is aimed at maintaining domestic production capacity.

External Funding (Liabilities)

Water Hardness

Hard water is water that contains appreciable amounts of dissolved calcium and magnesium compounds. These compounds form insoluble precipitates with soap. Ion exchangers are used to remove the hardness.

Temporary Hardness

Temporary hardness is caused by the presence of calcium and magnesium bicarbonates. It can be eliminated by heating the water to precipitate the calcium carbonate:

Ca(HCO₃)₂ → CaCO₃↓ + CO₂ + H₂O

Permanent Hardness

Permanent hardness refers to the remaining calcium and magnesium salts (not bicarbonates). It requires the addition of chemicals for removal, for example:

Na₂CO₃ + CaCl₂ → CaCO₃↓ + 2NaCl

Water Pollution

Thermal Pollution

Heat, in general, is not considered a contaminant, but its effects on water can... Continue reading "Water Hardness, Pollution, Cleaners, and Sampling" »

Fundamental Rights and Sovereignty

The Spanish Constitution recognizes a wide range of freedoms and rights, including the right to life, equality before the law, freedom of expression, association and assembly; property rights, free enterprise, and the right and duty to work.

Sovereignty resides in the Spanish people, from whom all powers emanate. The people elect representatives through direct, secret, universal suffrage, choosing between various political parties.

State Structure and Division of Powers

Spain is a social, democratic, and rule-of-law state. The King is the highest representative of the state and has limited functions, such as enacting laws and holding supreme command of the armed forces. The principle of the separation of powers... Continue reading "Spanish Political Organization and Institutions" »

Selectivity in Chemical Analysis

A reaction used in chemical analysis is selective when the reaction is characteristic of few substances, showing a preference for some of these. When the reaction is carried out only on a particular substance, it is specific.

Limit of Detection (LOD)

Refers to the minimum amount of a substance that can be detected in a trial.

Sensitivity of Analytical Methods

The ability of a method to discriminate a change in concentration caused by a variation in the measurement of the analytical signal.

Qualitative vs. Quantitative Analysis

The science that studies the principles and techniques of chemical analysis. It is divided into:

• Qualitative analysis: Its purpose is the identification of the constituents of a sample (organic

1. MINIMUM STANDARDS

Rule 102 of the ILO: 100% of the workforce should be protected for at least 20% of the economically active population (PEA). 50% of the total population protected (PTA). 100% of the polar groups (risk groups), the very old or very minor (GP). 100% of excluded groups.

1. Describe the characteristics that motivate the German model and the English model.

   German model:

   The industrial revolution - Public assistance by Asin - there was not a labor law - the concentration of labor - Accidents at work.

   English model:

   - Unemployment - housing - death - the German model is limited to persons who had an employment relationship.

   Bismarck Model: Characteristics

   1. Tripartite
   2. Governance
   3. Specialized
   4. Compulsory employer and employee contributions

2. English Model:

Chapter 1: Developments in the Channel in the 16th Century

The third-person narrator tells the story, seemingly drawing information from various sources or authors.

Chapters XI-XIV: Encounters with Goatherds

What era are we referring to? What were its characteristics? How was life lived? It refers to a primitive era where freedom, honesty, and beauty took precedence. The current difference is that these values are lost, and the errant knight must restore them.

Theory: Style

Part 1 was published in 1605, and Part 2 in 1615.

The False Quixote

In 1614, a false Quixote, signed by Avellaneda, capitalized on the success of the first part and insulted Cervantes in the prologue.

Genesis and Intention

"History of a crazy-wise man who, invoking his madness, tells... Continue reading "Don Quixote: Reason, Idealism, and Spanish Society" »