LISP 2010 Estate Safety, Health and Welfare III

Soalan 4a.
Apakah faktor-faktor tingkahlaku manusia dan bukan tingkahlaku yang menyebabkan penyakit demam denggi?

Jawapan;

1.0 Pengenalan,
Masyarakat perlu sedar mengenai bahaya penyakit demam denggi dan mencegah penyakit demam denggi adalah lebih baik dari mengubatinya. Faktor tingkahlaku manusia dan bukan tingkahlaku adalah penyebab kepada wabak penyakit demam denggi merebak.

2.0 Faktor tingkahlaku manusia,
i. Sampah dibuang di merata-rata
ii. Tidak membersihkan takungan air
iii. Persekitaran kediaman semak-samun
iv. Bangunan terbiar dan tidak diuruskan
v. Kolah air terbiar dan tidak dicuci
vi. Tayar dan botol terbiar
vii. Pesticide tidak diuruskan dengan baik
viii. Kurang kesedaran mengenai kebersihan
ix. Sikap tidak ambil peduli/tidak kisah
x. Longkang terbiar dan tersumbat

3.0 Faktor bukan tingkahlaku manusia,
i. Cuaca kerap hujan
ii. Terdapat takungan semulajadi
iii. Terdapat tanaman semulajadi
iv. Persekitaran yang lembab
v. Persekitaran yang gelap

4.0 Rumusan,
Untuk mencegah demam denggi ialah dengan memusnahkan tempat pembiakan nyamuk. Nyamuk aedes membiak dalam tempat-tempat takungan air seperti tayar buruk dan bekas menyimpan air. Air di dalam pasu bunga dan bekas air minum haiwan peliharaan perlu selalu ditukar untuk mencegah nyamuk aedes dari membiak.

Soalan 4b.
Bagaimana penyakit demam denggi dapat dibenteras di ladang Felda dan apakah tindakan pencegahan dan pengawalan yang dapat diambil?

Jawapan;

1.0 Pengenalan
Masyarakat perlu sedar mengenai bahaya penyakit demam denggi dan mencegah penyakit demam denggi adalah lebih baik dari mengubatinya. Faktor tidak menjaga kebersihan di dalam dan di luar rumah serta persekitran kawasan adalah penyebab kepada wabak penyakit demam denggi. Tindakan pencegahan dan pengawalan perlu diambil supaya penyakit demam denggi tidak merebak.

2.0 Punca penyakit demam denggi
Sikap masyarakat yang tidak mahu menjaga kebersihan persekitaran adalah menjadi punca utama pembiakan nyamuk aedes. Gigitan nyamuk aedes dewasa yang membawa kuman denggi ke badan manusia menyebabkan punca penyakit demam denggi berlaku.

3.0 Pelan tindakan program pencegahan dan pengawalan demam denggi,

i. Tetapkan matlamat;

Sifar kes demam denggi di ladang Felda.
ii. Pelan tindakan dan aktiviti pencegahan;
a. Kempen kesedaran bahaya penyakit demam denggi.
b. Kempen gotong-royong.
c. Kempen kampong indah dan bersih.
d. Menjalankan aktiviti pembersihan dan pencegahan.
e. Penguatkuasaan undang-undang.

iii. Strategi berdasarkan kepada pelan tindakan;

a. Kempen kesedaran bahaya penyakit demam denggi,

1. Menjalankan aktiviti dalam bentuk pendidikan formal dan tidak formal yang dianjurkan oleh majikan seperti kursus, seminar dan bengkel diberikan secara berterusan kepada masyarakat setempat.
2. Menjalankan promosi membunuh nyamuk aedes, mengawal wabak penyakit demam denggi dan menjaga kebersihan persekitaran kawasan dengan mengedarkan risalah kepada pekerja dan masyarakat setempat, menampal poster di kawasan awam dan membuat banner atau kain rentang di kawasan awam yang strategik.
   

b. Kempen gotong-royong,

Menjalankan aktiviti membersihkan persekitaran dengan penglibatan daripada majikan, pekerja dan masyarakat setempat. Kempen ini perlu dijalankan secara berterusan dengan membentuk jawatankuasa pemandu dan jawatankuasa penduduk.

c. Kempen pertandingan kampong indah dan bersih,
Menjalankan aktiviti pertandingan kampong indah dan bersih dengan penglibatan dan anjuran daripada majikan dengan menetapkan insentif dan ganjaran kepada pemenang. Kempen ini perlu dijalankan secara berterusan dengan membentuk jawatankuasa pemandu dan program secara tahunan.

d. Menjalankan aktiviti pembersihan dan pencegahan,
Berikut adalah langkah-langkah pencegahan utama demam denggi;

1. Perlindungan dari gigitan nyamuk. Untuk mengelak dari gigitan nyamuk, seseorang itu perlulah mengetahui tabiat makan nyamuk dan menggunakan bahan penghindar nyamuk pada kulit badan yang terdedah apabila diperlukan. Pakai pakaian yang menutupi kebanyakan bahagian tubuh badan kerana ini boleh melindungi dari gigitan nyamuk. Pasangkan jaring nyamuk dan skrin pada tingkap di rumah untuk mencegah nyamuk dari memasuki ke dalam rumah. Elakkan dari membuat lawatan ke kawasan berisiko tinggi wabak demam denggi. Ini adalah kerana nyamuk aedes bukanlah serangga malam. Waktu puncak ia mencari makan ialah di awal pagi dan awal senja.
2. Musnahkan tempat pembiakan nyamuk. Cara lain untuk mencegah penyakit demam denggi ialah dengan memusnahkan tempat pembiakan nyamuk. Nyamuk aedes membiak dalam tempat-tempat takungan air seperti tayar buruk dan bekas menyimpan air. Perkara yang perlu lakukan ialah: Tutup dengan rapat semua bekas air seperti baldi, besen dan tong-tong atau masukkan ubat pembunuh jentik-jentik ke dalamnya. Salin air dalam jambangan bunga setiap minggu. Buangkan air dan basuh pengalas pasu bunga setiap minggu. Periksa saluran air hujan (saluran bumbung) setiap minggu dan buang daun-daun kayu atau sampah sarap lain yang menyekat aliran air. Bersihkan persekitaran rumah. Buangkan semua bekas atau benda yang boleh menakung air seperti tayar buruk, tin kosong dan botol Pungut sampah-sarap ke dalam beg plastik dan letakkan di dalam tong sampah yang bertutup.
3. Hapuskan nyamuk aedes dewasa.
   

Menjalankan semburan kabus racun serangga (Fogging) dengan menggunakan mesin Ultra Low Volume bertujuan untuk membunuh nyamuk dewasa. Semburan dijalankan pada awal pagi dan petang dan keadaan cuaca yang sesuai (tanpa hujan)
Gunakan penyembur serangga bagi membunuh nyamuk dewasa di dalam rumah. Lakukan semburan menyeluruh di bahagian dalam rumah. Penggunaan ubat nyamuk untuk mengelakkan dari digigit nyamuk jika perlu.
e. Penguatkuasaan undang-undang dan peraturan,
Akta, undang-undang dan peraturan adalah satu langkah tindakan dan kawalan untuk memastikan masyarakat sedar dan mengamalkan penjagaan kebersihan di dalam dan di luar rumah serta persekitarannya supaya wabak demam denggi dapat dikawal dan tidak merebak.
iv. Penilaian program;
Penilaian untuk setiap sesi program perlu dijalankan oleh pihak penganjur program untuk memastikan setiap matlamat dapat dicapai dan juga sebagai panduan untuk tindakan pembetulan sekiranya program didapati gagal dimanafaatkan.
4.0 Rumusan,
Masyarakat perlu sedar mengenai bahaya penyakit demam denggi dan mencegah demam denggi adalah lebih baik dari mengubati kerana sehingga kini belum ada vaksin yang sesuai untuk mengubat penyakit demam denggi. Adalah disarankan supaya semua pihak menjaga kebersihan diri dan persekitaran supaya penyakit demam denggi dapat dikawal dan tidak merebak.l

LISP 2010 Estate Safety, Health and Welfare II

Soalan 3a

Apakah factor-faktor menyebabkan stress

Jawapan:

1.0 Pengenalan

Tekanan ialah sesuatu yang kita tidak boleh elakkan atau abaikan, ia adalah sebahagian daripada hidup kita.

Badan kita ialah dalam keadaan keseimbangan atau homeostatasis di mana keadaan fisiologikal dan psikologikal adalah dalam keadaan seimbang.
Apa jua yang mengangggu keseimbangan kita ialah penekan (stressor) dan memberi risiko tekanan.
Badan kita bertindakbalas kepada tekanan ini dengan satu set tindakbalas atau penyesuaian. Tekanan bukan sentiasa negative, ia juga boleh menjadi positif.
Satu boleh menjadi ancaman, manakala yang satu lagi membawa kepada keadaan seronok. Tekanan positif digelar “eustress” manakala yang negatif pula adalah “distress”.

Ketika kecemasan, tenaga digerakkan dan diarahkan daripada simpanan dan daripada fungsi tidak penting kepada fungsi yang penting untuk berlawan atau melompat.

Tetapi apabila ini berlaku terlalau lama, kesan-kesannya boleh membahayakan orang tersebut. Ini digelar tenakan kronik (‘chronic stress’).

2.0 Faktor-faktor menyebabkan Stress

2.1 Faktor Luar
Faktor-faktor luaran yang menyebabkan stress adalah seperti.

Faktor Fizikal

• Bunyi Bising
• Lampu Terang
• Suhu Panas
• Ruang Terkurung
• interaksi sosial
• Bersikap kasar
• Sikap selalu mengarah
• Ditakuti oleh orang lain
• Menjadi bahan buli oleh orang lain
  

- Organisarsi

• Undang-undang yang terlalu banyak
• Peraturan yang terlalu ketat
• Prosidur yang terlalu ketatTempoh menyiapkan kerja yang singkat
  

- Peristiwa yang tidak dijangka dalam kehidupan

• Kelahiran baru
• Kematian keluarga
• Dibuang kerja
• Kenaikkan pangkat yg melibatkan pertukaran tempat kerjabercerai
  

- kejadian yang menyusahkan

• hilang kunci
• kereta rosak
• tertinggal file
• file dalam folder tidak dijumpai
  

2.2 Faktor Dalaman

- Cara hidup

• Kandungan kefain dalam badan
• kurang tidur
• jadual yang ketat
• Anggappan diri yg negative (negative self talk)
• Terlalu mengambil berat tentang sesuatu perkara
• Mengkritik diri sendiri
• Sikap mudah putus asa.
• Suka fikir diri tidak bagus
• Terlalu suka menganalisa sesuatu perkara
  

- Pemikiran dibawah tempurung (mind trap)

• Harapan tidak logic
• Pemikiran kolot
• Sentiasa rasa diri bagus
  

- Sifat peribadi tersendiri

• Terlalu ingin kerja sempurna
• Terlalu kuat bekerja

Soalan 3b

Bincangkan bagaimana menangani stress

Jawapan;

1.0 Tekanan boleh dikawal menggunakan strategi ABC iaitu

Awareness (kesedaran),

Balance (Keseimbangan) dan

Control (kawalan).

2.0 Teknik pengurusan tekanan

2.1 Ubah pemikiran
Ubah perspektif pemikiran
Berpikiran positif

• Lihat kekuatan diri
• Lihat peluang yang ada
• Belajar dari pengalaman lepas
  

Ubah perangai
Tegas
Kelakuan yang tersusun

• Urus masa dgn baik
• Rancang aktiviti harian
  

Bergaul dan berkongsi suka duka
Sentiasa senang hati
Alihkan tekanan kepada aktiviti lain

• Keluar sekejap dari tekanan
• Bertenang
• Kurangkan tahap tekanan
• Berfikiran logik
  

2.3 Ubah cara hidup

Diet

• Makan makanan yang sihat
• Kurangkan garam dan gula dalam makanan dan minuma
• Kurangkan pengambilan makanan berunsur kafina
  

Tidak merokok atau minum minuman keras
Bersenanam

• Tingkatkan kitaran darah
• Kurangkan tekanan darah
• Memperbaiki penampilan diri
• Merapat hubungan kemasyarakatan
  

Tidur yang cukup

• Beri bekalan tenaga yang cukup sepanjang hari
• Satu pengurang tekanan yang berkesan
  

Bersantai

Berehat

• Mengurangkan kesakitan
• Mengurangkan ketegangan pada otot
• Kurangkan tekanan darah
• Mengurangkan kerisauan
• Meningkatkan produktiviti
  

Rumusan
Tekanan sebenarnya boleh diatasi jika seseoarang dapat mempraktikkan teknik yang dinyatakan di atas. Seseorang mampu mengatasi tekanan jika beliau dapat mengubah 3 perkara utama iaitu

pemikiran,
perangai dan
cara hidup

Rotary Engine

1. The rotary engine was an early type of internal-combustion engine, usually designed with an odd number of cylinders per row in a radial configuration, in which the crankshaft remained stationary and the entire cylinder block rotated around it. The design was used mostly in the years shortly before and during World War I to power aircraft, and also saw use in a few early motorcycles and cars.
2. By the early 1920s the rotary aircraft engine was becoming obsolete, mainly because of an upper ceiling to its possible output torque, which was a fundamental consequence of the way the engine worked.
3. It was also limited by its inherent restriction on breathing capacity due to the need for the fuel/air mixture to be aspirated through the hollow crankshaft and crankcase, which directly affected its volumetric efficiency.
4. However, at the time it was a very efficient solution to the problems of power output, weight, and reliability.

Brayton Cycle

The Brayton cycle is a thermodynamic cycle that describes the workings of the gas turbine engine, basis of the jet engine and others.

It is named after George Brayton (1830–1892), the American engineer who developed it, although it was originally proposed and patented by Englishman John Barber in 1791.^[1] It is also sometimes known as the Joule cycle.

The Ericsson cycle is similar but uses external heat and incorporates the use of a regenerator.

Gas Engine

1. A gas engine means an engine running on a gas, such as coal gas, producer gas biogas, landfill gas, or natural gas. In the UK, the term is unambiguous. In the US, due to the widespread use of "gas" as an abbreviation for gasoline, such an engine might also be called a gaseous fueled engine, spark ignited engine, or natural gas engine.
2. Generally the term gas engine refers to a heavy duty, slow revving industrial engine capable of running continuously at full output for periods approaching a high fraction of 8,760 hours per year, for many years, with indefinite lifetime, unlike say a gasoline automobile engine which is lightweight, high revving and typically runs for no more than 4,000 hours in its entire life. Typical power ranges from 10 kW to 4,000 kW.
   

4-Stroke Engine

From Wikipedia, the free encyclopedia

Four-stroke cycle used in gasoline engines. The right blue side is the intake and the left yellow side is the exhaust. The cylinder wall is a thin sleeve surrounded by cooling water.

1. Today, internal combustion engines in cars, trucks, motorcycles, aircraft, construction machinery and many others, most commonly use a four-stroke cycle. The four strokes refer to intake, compression, combustion (power), and exhaust strokes that occur during two crankshaft rotations per working cycle of the gasoline engine and diesel engine.
2. The cycle begins at Top Dead Center (TDC), when the piston is farthest away from the axis of the crankshaft. A stroke refers to the full travel of the piston from Top Dead Center (TDC) to Bottom Dead Center (BDC). (See Dead centre.)

1. INTAKE stroke: On the intake or induction stroke of the piston , the piston descends from the top of the cylinder to the bottom of the cylinder, reducing the pressure inside the cylinder. A mixture of fuel and air is forced by atmospheric (or greater) pressure into the cylinder through the intake port. The intake valve(s) then close.

2. COMPRESSION stroke: With both intake and exhaust valves closed, the piston returns to the top of the cylinder compressing the fuel-air mixture. This is known as the compression stroke.

3. POWER stroke.: While the piston is close to Top Dead Center, the compressed air–fuel mixture is ignited, usually by a spark plug (for a gasoline or Otto cycle engine) or by the heat and pressure of compression (for a diesel cycle or compression ignition engine). The resulting massive pressure from the combustion of the compressed fuel-air mixture drives the piston back down toward bottom dead center with tremendous force. This is known as the power stroke, which is the main source of the engine's torque and power.

4. EXHAUST stroke.: During the exhaust stroke, the piston once again returns to top dead center while the exhaust valve is open. This action evacuates the products of combustion from the cylinder by pushing the spent fuel-air mixture through the exhaust valve(s).

2 Stroke Engine

1. A two-stroke engine is an internal combustion engine that completes the thermodynamic cycle in two movements of the piston (compared to twice that number for a four-stroke engine).
   
2. This increased efficiency is accomplished by using the beginning of the compression stroke and the end of the combustion stroke to perform simultaneously the intake and exhaust (or scavenging) functions.
   
3. In this way two-stroke engines often provide strikingly high specific power. Gasoline (spark ignition) versions are particularly useful in lightweight (portable) applications such as chainsaws and the concept is also used in diesel compression ignition engines in large and non-weight sensitive applications such as ships and locomotives.
4. Invention of the two-stroke cycle is attributed to Scottish engineer Dugald Clerk who in 1881 patented his design, his engine having a separate charging cylinder. The crankcase-scavenged engine, employing the area below the piston as a charging pump, is generally credited to Englishman Joseph Day (and Frederick Cock for the piston-controlled inlet port).

RECIPROCATING Engine

Internal combustion piston engine
Components of a typical, four stroke cycle, internal combustion piston engine.
E - Exhaust camshaft
I - Intake camshaft
S - Spark plug
V - Valves
P - Piston
R - Connecting rod
C - Crankshaft
W - Water jacket for coolant flow

A reciprocating engine, also often known as a piston engine, is a heat engine that uses one or more reciprocating pistons to convert pressure into a rotating motion. This article describes the common features of all types.

The main types are: the internal combustion engine, used extensively in motor vehicles; the steam engine, the mainstay of the Industrial Revolution; and the niche application Stirling engine.

5 M Factors

The 5-M Factors are a model called

1. Man
2. Machine
3. Medium
4. Mission
5. Management,

and are used to examine the nature of accidents in the transport industries. It was started by T.P. Wright's Man-Machine-Environment triad at Cornell University. The 5-M incorporates a diagram of 3 intertwined circles and one all-encompassing circle. In each of the smaller circles "Man," "machine," and "medium" are placed. The large circle is labeled "Management." The space in the middle where they all meet is called "Mission," which is the objective the other four M's have in common.

Centralization & Decentralization

Centralization, decentralization, and formalization

• Centralization - The location of decision making authority near top organizational levels.
• Decentralization - The location of decision making authority near lower organizational levels.
• Formalization - The written documentation used to direct and control employees.

Centralisation, or centralization (see spelling differences), is the process by which the activities of an organisation, particularly those regarding planning decision-making, become concentrated within a particular location and/or group.

In political science, this refers to the concentration of a government's power - both geographically and politically, into a centralised government.

In neuroscience, centralization refers to the evolutionary trend of the nervous system to be partitioned into a central nervous system and peripheral nervous system.

In business studies centralisation and decentralisation is about where decisions are taken in the chain of command.

Decentralization or Decentralisation (see spelling differences) is the process of dispersing decision-making governance closer to the people and/or citizen. It includes the dispersal of administration or governance in sectors or areas like engineering, management science, political science, political economy, sociology and economics. Decentralization is also possible in the dispersal of population and employment. Law, science and technological advancements lead to highly decentralized human endeavours.

"While frequently left undefined (Pollitt, 2005), decentralization has also been assigned many different meanings (Reichard & Borgonovi, 2007), varying across countries (Steffensen & Trollegaard, 2000; Pollitt, 2005), languages (Ouedraogo, 2003), general contexts (Conyers, 1984), fields of research, and specific scholars and studies." (Dubois and Fattore 2009)

A central theme in decentralization is the difference between a hierarchy, based on:

• authority: two players in an unequal-power relationship; and
• an interface: a lateral relationship between two players of roughly equal power.

The more decentralized a system is, the more it relies on lateral relationships, and the less it can rely on command or force. In most branches of engineering and economics, decentralization is narrowly defined as the study of markets and interfaces between parts of a system. This is most highly developed as general systems theory and neoclassical political economy.

FMA Part 1; Reg 6

FMA (Person In Charge and Certificates of Competency-Examinations) 1970

Part I

Reg 6

No.	Internal combustion engines nor a dredge
2	<100>	1st @ 2nd driver during in shift
	>100 HP	Driver in charge shall be assisted during each shift by 1st or 2nd drivers and there are not more than 2 engines to each driver.
3	<500>	1st driver for each shift, more than 2 engines (refer above)
4	500 – 1000 HP	1st driver for each shift, > 1 engine 1st driver assisted by 1st driver. Shall employ 1st visiting engineer.
5	1000-1500 HP	1st @ 2nd engineer, he shall assisted by 1st driver for each shift. >2 engines, 1st driver shall be employed.
6	>1500	1st engineer & 1st driver shall be in charge. > 1 engine, 1st driver shall be employed for each shift (not more than 2 engines)
7	Aggregate >1500 HP <2000>	1st @ 2nd engineer visiting engineer. >2000 HP

MONTHLY BOILER MECHANICAL SAFETY CHECKS

Monthly safety checks on combustion and mechanical systems are just as critical to a comprehensive boiler maintenance program as proper water treatment. Boiler operators have long understood that water treatment is essential for reliability and longevity. However, for many years, mechanical systems were often addressed only after a failure occurred or during scheduled shutdowns.

This reactive approach is costly, risky, and unnecessary.

A structured preventive mechanical maintenance program provides measurable benefits and significantly improves safety, efficiency, and reliability.

---

Seven Key Advantages of Preventive Boiler Maintenance

1. Reduced fuel costs through improved efficiency

2. Avoidance of major capital expenses (repairs or replacement)

3. Reduced downtime due to unexpected failures

4. Improved operational safety

5. Enhanced operator training and awareness

6. Independent third-party audits

7. Improved insurance compliance and assurance

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1. Reducing Fuel Costs Through Efficiency

For many years, fuel costs were not considered a major factor in manufacturing expenses. That changed permanently with the Arab oil embargo of the 1970s. In some industries, energy became the second-highest operating cost, rivaling labor.

Today, competition, deregulation of natural gas, and long-term energy sustainability have made efficiency a strategic necessity.

Consider this example:

• A boiler operating at 20,000 lb/hr (PPH)

• Operating 7 days per week

• Annual fuel cost: ≈ USD 1,000,000 (at USD 5.00 per MCF)

A 1% improvement in efficiency delivers USD 10,000 in annual savings, often exceeding the cost of monthly maintenance services.

Visual inspections alone offer little value.
Proper analysis requires a combustion analyzer with stack probe and documented results.

Fuel savings alone can justify a comprehensive mechanical maintenance program.

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2. Avoiding Rising Capital Costs

The cost of new boilers has risen sharply over the past decade—largely for good reasons.

Modern boilers now comply with:

• CSD-1 (Control Safety Device standards)

• NFPA (National Fire Protection Association) codes

These advances significantly improve safety but also increase system complexity. Today’s control systems feature:

• Advanced load management

• Distributed Control Systems (DCS)

• Integration with computerized monitoring platforms

Qualified technicians must continuously adapt to this evolving technology. Companies that fail to keep pace face higher repair costs and premature equipment replacement. Proper mechanical servicing directly reduces capital expenditure.

---

3. Reducing Downtime

Downtime is one of the most expensive consequences of poor maintenance.

• Small plants: thousands of dollars per hour

• Large plants: hundreds of thousands per hour

Monthly mechanical testing often detects control degradation and improper operation early, allowing corrective action before a failure occurs.

Early detection saves money, protects production schedules, and improves safety.

---

Maintaining Boiler Efficiency

Fuel is typically the largest single operating expense in a boiler plant. Efficiency control depends on two key activities:

1. Continuous monitoring

2. Timely tuning and adjustment

Monitoring is the operator’s responsibility. Tuning is often performed by qualified external contractors, particularly in smaller plants where equipment investment is not economical.

Operators must still understand tuning fundamentals to ensure contractors perform the work correctly. Knowledge of combustion and control principles is essential—not optional.

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The Importance of Records

Maintenance without documentation is incomplete.

Just as oil-change stickers remind us when service is due, maintenance records ensure reliability and accountability.

Records serve several critical purposes:

• Track service intervals

• Identify recurring failures

• Specify correct lubricants, parts, and procedures

• Provide proof of compliance after an incident

If a task is listed in an SOP, a completed log entry is legal proof that it was performed.

Inconsistent or missing documentation undermines credibility and exposes both operators and employers to serious risk.

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Operator Error and Poor Maintenance

National Board statistics show an increase in failures attributed to operator error, but the data lacks sufficient detail. One likely contributor is the elimination of licensed boiler operators, replaced by unlicensed personnel with limited training.

This is not an operator problem—it is a management problem.

Operators often keep plants running through temporary fixes because management defers proper maintenance. Eventually, these shortcuts accumulate until failure is unavoidable.

Licensed operators have the authority—and responsibility—to shut down unsafe equipment. When that authority is absent, reporting unsafe conditions to the State Chief Boiler Inspector remains a critical safeguard.

Insurance inspections are not infallible. State inspectors frequently identify serious hazards that insurers overlook or never physically inspect.

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Attitude, Responsibility, and Respect for the Equipment

Most boiler failures are not caused by ignorance—but by attitude.

The most dangerous mindset is:

“The boss doesn’t care, so why should I?”

Boilers demand respect. They are not forgiving machines.
Lack of fear leads to shortcuts:

• Reduced purge times

• Skipped water analysis

• Ignored alarms

These decisions eventually result in failure, injury, or death.

Training and licensing do not guarantee perfection—but they instill discipline, respect, and professional responsibility.

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Final Thoughts

Mistakes happen. I’ve made them myself—some serious ones. This knowledge comes from experience, not theory.

If this material helps you avoid even one failure, one injury, or one fatality, then it has done its job.

Respect the equipment.
Respect the profession.
And never forget the consequences.

God bless you all—
the devil doesn’t need any more help with his furnaces.

Advantages and disadvantages of gas turbine engines

Advantages of gas turbine engines

• Very high power-to-weight ratio, compared to reciprocating engines;
• Smaller than most reciprocating engines of the same power rating.
• Moves in one direction only, with far less vibration than a reciprocating engine.
• Fewer moving parts than reciprocating engines.
• Low operating pressures.
• High operation speeds.
• Low lubricating oil cost and consumption.

Disadvantages of gas turbine engines

• Cost
• Less efficient than reciprocating engines at idle
• Longer startup than reciprocating engines
• Less responsive to changes in power demand compared to reciprocating engines

Types of gas turbines

Aeroderivatives and jet engines

Airbreathing jet engines are gas turbines optimized to produce thrust from the exhaust gases, or from ducted fans connected to the gas turbines. Jet engines that produce thrust primarily from the direct impulse of exhaust gases are often called turbojets, whereas those that generate most of their thrust from the action of a ducted fan are often called turbofans or (rarely) fan-jets.

Gas turbines are also used in many liquid propellant rockets, the gas turbines are used to power a turbopump to permit the use of lightweight, low pressure tanks, which saves considerable dry mass.

Aeroderivatives are also used in electrical power generation due to their ability to startup, shut down, and handle load changes more quickly than industrial machines. They are also used in the marine industry to reduce weight. The GE LM2500 and LM6000 are two common models of this type of machine.

Amateur gas turbines

Increasing numbers of gas turbines are being used or even constructed by amateurs.

In its most straightforward form, these are commercial turbines acquired through military surplus or scrapyard sales, then operated for display as part of the hobby of engine collecting.^[2][3] In its most extreme form, amateurs have even rebuilt engines beyond professional repair and then used them to compete for the Land Speed Record.

The simplest form of self-constructed gas turbine employs an automotive turbocharger as the core component. A combustion chamber is fabricated and plumbed between the compressor and turbine sections.^[4]

More sophisticated turbojets are also built, where their thrust and light weight are sufficient to power large model aircraft.^[5] The Schreckling design^[5] constructs the entire engine from raw materials, including the fabrication of a centrifugal compressor wheel from plywood, epoxy and wrapped carbon fibre strands.

Like many technology based hobbies, they tend to give rise to manufacturing businesses over time. Several small companies now manufacture small turbines and parts for the amateur. Most turbojet-powered model aircraft are now using these commercial and semi-commercial microturbines, rather than a Schreckling-like home-build.^[6

Auxiliary power units

APUs are small gas turbines designed for auxiliary power of larger machines, such as those inside an aircraft. They supply compressed air for aircraft ventilation (with an appropriate compressor design), start-up power for larger jet engines, and electrical and hydraulic power.

Industrial gas turbines for power generation

GE H series power generation gas turbine. This 480-megawatt unit has a rated thermal efficiency of 60% in combined cycle configurations.

Industrial gas turbines differ from aeroderivative in that the frames, bearings, and blading is of heavier construction. Industrial gas turbines range in size from truck-mounted mobile plants to enormous, complex systems.^{[clarification needed]} They can be particularly efficient—up to 60%—when waste heat from the gas turbine is recovered by a heat recovery steam generator to power a conventional steam turbine in a combined cycle configuration.^[7][8] They can also be run in a cogeneration configuration: the exhaust is used for space or water heating, or drives an absorption chiller for cooling or refrigeration. Such engines require a dedicated enclosure, both to protect the engine from the elements and the operators from the noise.^{[citation needed]}

The construction process for gas turbines can take as little as several weeks to a few months, compared to years for base load power plants.^{[citation needed]} Their other main advantage is the ability to be turned on and off within minutes, supplying power during peak demand. Since single cycle (gas turbine only) power plants are less efficient than combined cycle plants, they are usually used as peaking power plants, which operate anywhere from several hours per day to a few dozen hours per year, depending on the electricity demand and the generating capacity of the region. In areas with a shortage of base load and load following power plant capacity or low fuel costs, a gas turbine power plant may regularly operate during most hours of the day. A large single cycle gas turbine typically produces 100 to 300 megawatts of power and have 35–40% thermal efficiency.^[9]

Compressed air energy storage

Main article: Compressed air energy storage

One modern development seeks to improve efficiency in another way, by separating the compressor and the turbine with a compressed air store. In a conventional turbine, up to half the generated power is used driving the compressor. In a compressed air energy storage configuration, power, perhaps from a wind farm or bought on the open market at a time of low demand and low price, is used to drive the compressor, and the compressed air released to operate the turbine when required.

Turboshaft engines

Turboshaft engines are often used to drive compression trains (for example in gas pumping stations or natural gas liquefaction plants) and are used to power almost all modern helicopters. The first shaft bears the compressor and the high speed turbine (often referred to as "Gas Generator" or "N1"), while the second shaft bears the low speed turbine (or "Power Turbine" or "N2"). This arrangement is used to increase speed and power output flexibility.

[edit] Radial gas turbines

Main article: Radial turbine

In 1963, Jan Mowill initiated the development at Kongsberg Våpenfabrikk in Norway. Various successors have made good progress in the refinement of this mechanism. Owing to a configuration that keeps heat away from certain bearings the durability of the machine is improved while the radial turbine is well matched in speed requirement.

Scale jet engines

Scale jet engines are scaled down versions of this early full scale engine

Also known as miniature gas turbines or micro-jets.

With this in mind the pioneer of modern Micro-Jets, Kurt Schreckling, produced one of the world's first Micro-Turbines, the FD3/67.^[5] This engine can produce up to 22 newtons of thrust, and can be built by most mechanically minded people with basic engineering tools, such as a metal lathe.^[5]

Microturbines

A micro turbine designed for DARPA

Also known as:

• Turbo alternators
• MicroTurbine
• Turbogenerator

Microturbines are becoming widespread for distributed power and combined heat and power applications. They are one of the most promising technologies for powering hybrid electric vehicles. They range from hand held units producing less than a kilowatt, to commercial sized systems that produce tens or hundreds of kilowatts. Basic principles of microturbine are based on micro combustion.

Part of their success is due to advances in electronics, which allows unattended operation and interfacing with the commercial power grid. Electronic power switching technology eliminates the need for the generator to be synchronized with the power grid. This allows the generator to be integrated with the turbine shaft, and to double as the starter motor.

Microturbine systems have many advantages over reciprocating engine generators, such as higher power-to-weight ratio, extremely low emissions and few, or just one, moving part. Advantages are that microturbines may be designed with foil bearings and air-cooling operating without lubricating oil, coolants or other hazardous materials. Microturbines also have a further advantage of having the majority of the waste heat contained in the relatively high temperature exhaust making it simpler to capture, whereas the waste heat of reciprocating engines is split between its exhaust and cooling system.^[10] However, reciprocating engine generators are quicker to respond to changes in output power requirement and are usually slightly more efficient, although the efficiency of microturbines is increasing. Microturbines also lose more efficiency at low power levels than reciprocating engines. When used in vehicles the static efficiency drawback is negated by the superior power-to-weight ratio - the vehicle does not have to move a heavy engine and transmission.

They accept most commercial fuels, such as gasoline, natural gas, propane, diesel, and kerosene as well as renewable fuels such as E85, biodiesel and biogas.

Microturbine designs usually consist of a single stage radial compressor, a single stage radial turbine and a recuperator. Recuperators are difficult to design and manufacture because they operate under high pressure and temperature differentials. Exhaust heat can be used for water heating, space heating, drying processes or absorption chillers, which create cold for air conditioning from heat energy instead of electric energy.

Typical microturbine efficiencies are 25 to 35%. When in a combined heat and power cogeneration system, efficiencies of greater than 80% are commonly achieved.

MIT started its millimeter size turbine engine project in the middle of the 1990s when Professor of Aeronautics and Astronautics Alan H. Epstein considered the possibility of creating a personal turbine which will be able to meet all the demands of a modern person's electrical needs, just like a large turbine can meet the electricity demands of a small city. Problems have occurred with heat dissipation and high-speed bearing in these new microturbines. Moreover, their expected efficiency is very low 5-6%. According to Professor Epstein current commercial Li-ion rechargeable batteries deliver about 120-150 Wh/kg. MIT's millimeter size turbine will deliver 500-700 Wh/kg in the near term, rising to 1200-1500 Wh/kg in the longer term.^[11]

Theory of operation ICE

Gas turbines are described thermodynamically by the Brayton cycle, in which air is compressed isentropically, combustion occurs at constant pressure, and expansion over the turbine occurs isentropically back to the starting pressure.

In practice, friction and turbulence cause:

1. non-isentropic compression: for a given overall pressure ratio, the compressor delivery temperature is higher than ideal.
2. non-isentropic expansion: although the turbine temperature drop necessary to drive the compressor is unaffected, the associated pressure ratio is greater, which decreases the expansion available to provide useful work.
3. pressure losses in the air intake, combustion and exhaust: reduces the expansion available to provide useful work.

Brayton cycle

As with all cyclic heat engines, higher combustion temperature means greater efficiency. The limiting factor is the ability of the steel, nickel, ceramic, or other materials that make up the engine to withstand heat and pressure. Considerable engineering goes into keeping the turbine parts cool. Some turbines also try to recover exhaust heat, which otherwise is wasted energy. Recuperators are heat exchangers that pass exhaust heat to the compressed air, prior to combustion. Combined cycle designs pass waste heat to steam turbine systems. And combined heat and power (co-generation) uses waste heat for hot water production.

Mechanically, gas turbines can be considerably less complex than internal combustion piston engines. Simple turbines might have one moving part: the shaft/compressor/turbine/alternative-rotor assembly (see image above), not counting the fuel system. However, the required precision manufacturing for components and temperature resistant alloys necessary for high efficiency often make the construction of a simple turbine more complicated than piston engines.

More sophisticated turbines (such as those found in modern jet engines) may have multiple shafts (spools), hundreds of turbine blades, movable stator blades, and a vast system of complex piping, combustors and heat exchangers.

As a general rule, the smaller the engine the higher the rotation rate of the shaft(s) needs to be to maintain top speed. Turbine blade top speed determines the maximum pressure that can be gained,this produces the maximum power possible independent of the size of the engine. Jet engines operate around 10,000 rpm and micro turbines around 100,000 rpm.

Thrust bearings and journal bearings are a critical part of design. Traditionally, they have been hydrodynamic oil bearings, or oil-cooled ball bearings. These bearings are being surpassed by foil bearings, which have been successfully used in micro turbines and auxiliary power units.

Gas Turbine a combustion turbine

1. A gas turbine, also called a combustion turbine, is a rotary engine that extracts energy from a flow of combustion gas. It has an upstream compressor coupled to a downstream turbine, and a combustion chamber in-between. Gas turbine may also refer to just the turbine component.
2. Energy is added to the gas stream in the combustor, where fuel is mixed with air and ignited. In the high pressure environment of the combustor, combustion of the fuel increases the temperature.
   
3. The products of the combustion are forced into the turbine section. There, the high velocity and volume of the gas flow is directed through a nozzle over the turbine's blades, spinning the turbine which powers the compressor and, for some turbines, drives their mechanical output. The energy given up to the turbine comes from the reduction in the temperature of the exhaust gas.
4. Energy is extracted in the form of shaft power, compressed air and thrust, in any combination, and used to power aircraft, trains, ships, generators, and even tanks.

Maslow's Hierarchy of Needs

Maslow's hierarchy of needs is a theory in psychology, proposed by Abraham Maslow in his 1943 paper A Theory of Human Motivation.^[2] Maslow subsequently extended the idea to include his observations of humans' innate curiosity. His theories parallel many other theories of human developmental psychology, all of which focus on describing the stages of growth in humans.

Maslow studied what he called exemplary people such as Albert Einstein, Jane Addams, Eleanor Roosevelt, and Frederick Douglass rather than mentally ill or neurotic people, writing that "the study of crippled, stunted, immature, and unhealthy specimens can yield only a cripple psychology and a cripple philosophy."^[3] Maslow studied the healthiest 1% of the college student population.^[4]

Maslow's theory was fully expressed in his 1954 book Motivation and Personality.^[5]

Contents [hide] 1 Hierarchy 1.1 1. Self-actualization 1.2 2. Esteem 1.3 3. Love and belonging 1.4 4. Safety needs 1.5 5. Physiological needs 2 Criticisms 3 Business 3.1 Marketing 3.2 International Business 4 See also 5 References 6 External links

Hierarchy

Maslow's hierarchy of needs is often portrayed in the shape of a pyramid, with the largest and lowest levels of needs at the bottom, and the need for self-actualization at the top.^[1][6]

The lower four layers of the pyramid contain what Maslow called "deficiency needs" or "d-needs": esteem , friendship and love, security, and physical needs. With the exception of the lowest (physiological) needs, if these "deficiency needs" are not met, the body gives no physical indication but the individual feels anxious and tense.

1. Self-actualization

“What a man can be, he must be.”^[7] This forms the basis of the perceived need for self-actualization. This level of need pertains to what a person's full potential is and realizing that potential. Maslow describes this desire as the desire to become more and more what one is, to become everything that one is capable of becoming.^[8] This is a broad definition of the need for self-actualization, but when applied to individuals the need is specific. For example one individual may have the strong desire to become an ideal parent, in another it may be expressed athletically, and in another it may be expressed in painting, pictures, or inventions.^[9] As mentioned before, in order to reach a clear understanding of this level of need one must first not only achieve the previous needs, physiological, safety, love, and esteem, but master these needs. Below are Maslow’s descriptions of a self-actualized person’s different needs and personality traits.

Maslow also states that even though these are examples of how the quest for knowledge is separate from basic needs he warns that these “two hierarchies are interrelated rather than sharply separated” (Maslow 97). This means that this level of need, as well as the next and highest level, are not strict, separate levels but closely related to others, and this is possibly the reason that these two levels of need are left out of most textbooks.

2. Esteem

All humans have a need to be respected and to have self-esteem and self-respect. Also known as the belonging need, esteem presents the normal human desire to be accepted and valued by others. People need to engage themselves to gain recognition and have an activity or activities that give the person a sense of contribution, to feel accepted and self-valued, be it in a profession or hobby. Imbalances at this level can result in low self-esteem or an inferiority complex. People with low self-esteem need respect from others. They may seek fame or glory, which again depends on others. Note, however, that many people with low self-esteem will not be able to improve their view of themselves simply by receiving fame, respect, and glory externally, but must first accept themselves internally. Psychological imbalances such as depression can also prevent one from obtaining self-esteem on both levels.

Most people have a need for a stable self-respect and self-esteem. Maslow noted two versions of esteem needs, a lower one and a higher one. The lower one is the need for the respect of others, the need for status, recognition, fame, prestige, and attention. The higher one is the need for self-respect, the need for strength, competence, mastery, self-confidence, independence and freedom. The latter one ranks higher because it rests more on inner competence won through experience. Deprivation of these needs can lead to an inferiority complex, weakness and helplessness. IN SHORT :- People need both self esteem, a high evaluation of self and the esteem of others in our society. Fulfillment of these needs provides a feeling of self-confidence and a usefulness and their non-fulfillment/ produces feelings like inferirority, unhelpfulness.

3. Love and belonging

After physiological and safety needs are fulfilled, the third layer of human needs are social and involve feelings of belongingness. This aspect of Maslow's hierarchy involves emotionally based relationships in general, such as:

• Friendship
• Intimacy
• Family

Humans need to feel a sense of belonging and acceptance, whether it comes from a large social group, such as clubs, office culture, religious groups, professional organizations, sports teams, gangs, or small social connections (family members, intimate partners, mentors, close colleagues, confidants). They need to love and be loved (sexually and non-sexually) by others. In the absence of these elements, many people become susceptible to loneliness, social anxiety, and clinical depression. This need for belonging can often overcome the physiological and security needs, depending on the strength of the peer pressure; an anorexic, for example, may ignore the need to eat and the security of health for a feeling of control and belonging.^{[citation needed]}

4. Safety needs

With their physical needs relatively satisfied, the individual's safety needs take precedence and dominate behavior. These needs have to do with people's yearning for a predictable orderly world in which perceived unfairness and inconsistency are under control, the familiar frequent and the unfamiliar rare. In the world of work, these safety needs manifest themselves in such things as a preference for job security, grievance procedures for protecting the individual from unilateral authority, savings accounts, insurance policies, reasonable disability accommodations, and the like.

Safety and Security needs include:

• Personal security
• Financial security
• Health and well-being
• Safety net against accidents/illness and their adverse impacts

5. Physiological needs

For the most part, physiological needs are obvious — they are the literal requirements for human survival. If these requirements are not met, the human body simply cannot continue to function.

Physiological needs include:^[1]

• Breathing
• Nutrition
• Homeostasis

Air, water, and food are metabolic requirements for survival in all animals, including humans. Clothing and shelter provide necessary protection from the elements. The intensity of the human sexual instinct is shaped more by sexual competition than maintaining a birth rate adequate to survival of the species.

Criticisms

In their extensive review of research based on Maslow's theory, Wahba and Bridgewell found little evidence for the ranking of needs Maslow described, or even for the existence of a definite hierarchy at all.^[10] Chilean economist and philosopher Manfred Max-Neef has also argued fundamental human needs are non-hierarchical, and are ontologically universal and invariant in nature—part of the condition of being human; poverty, he argues, may result from any one of these needs being frustrated, denied or unfulfilled.^{[citation needed]}

The order in which the hierarchy is arranged (with self-actualization as the highest order need) has been criticised as being ethnocentric by Geert Hofstede.^[11] Hofstede's criticism of Maslow's pyramid as ethnocentric may stem from the fact that Maslow’s hierarchy of needs neglects to illustrate and expand upon the difference between the social and intellectual needs of those raised in individualistic societies and those raised in collectivist societies. Maslow created his hierarchy of needs from an individualistic perspective, being that he was from the United States, a highly individualistic nation. The needs and drives of those in individualistic societies tend to be more self centered than those in collectivist societies, focusing on improvement of the self, with self actualization being the apex of self improvement. Since the hierarchy was written from the perspective of an individualist, the order of needs in the hierarchy with self actualization at the top is not representative of the needs of those in collectivist cultures. In collectivist societies, the needs of acceptance and community will outweigh the needs for freedom and individuality.

Maslow’s hierarchy has also been criticized as being individualistic because of the position and value of sex on the pyramid. Maslow’s pyramid puts sex on the bottom rung of physiological needs, along with breathing and food. It views sex from an individualistic and not collectivist perspective: i.e., as an individualistic physiological need that must be satisfied before one moves on to higher pursuits. This view of sex neglects the emotional, familial and evolutionary implications of sex within the community.