Engineering English
1 Occupational Safety /ˌɒkjʊˈpeɪʃənəl ˈseɪfti/ İş Güvenliği
The multidisciplinary field concerned with protecting the health, safety and welfare of people at work by preventing job-related injuries and illnesses.
Engineering Safety Terms in English
Engineering Safety English covers safety-critical vocabulary — hazards, risk assessment, PPE, lockout-tagout, standards and incident reporting. This free glossary lists the 60 most frequently used of the 300 Engineering Safety terms in the Engineering English iOS app — each with IPA pronunciation and a working definition. In the app, every term also includes example sentences, translations in 21 languages, flashcards and AI conversation practice.
On multinational sites, safety inductions, permits to work and incident reports are written in English — and misunderstanding them has real consequences. Safety vocabulary is the one part of engineering English where precision is not optional.
Last updated: July 30, 2026 · How terms are selected and ranked · 🇹🇷 Türkçesi
Quick answer: The 10 most frequently used Engineering Safety terms in English are Occupational Safety, Risk Assessment, Personal Protective Equipment, Incident, Accident, Scaffolding, Workplace Hazard, Lockout Tagout, Hard Hat, Fire Safety. The full Engineering English library contains 300 Engineering Safety terms with pronunciation, example sentences, translations and flashcards.
The 60 most-used Engineering Safety terms, ranked by frequency
2 Risk Assessment /rɪsk əˈsesmənt/ Risk Değerlendirmesi
A structured evaluation that estimates the likelihood and severity of harm arising from identified hazards and judges whether existing controls are adequate.
3 Personal Protective Equipment /ˈpɜːsənəl prəˈtektɪv ɪˈkwɪpmənt/ Kişisel Koruyucu Donanım
Clothing and devices worn by a worker to reduce exposure to a hazard when other measures cannot lower the remaining risk sufficiently.
4 Incident /ˈɪnsɪdənt/ Olay
An unplanned work-related event that causes or has the potential to cause injury, illness, damage or loss. It covers both harmful outcomes and events that only threatened harm.
5 Accident /ˈæksɪdənt/ Kaza
An unplanned event that actually results in injury, ill health, death or property damage. It is the subset of unwanted events in which harm has already occurred.
6 Scaffolding /ˈskæfəldɪŋ/ İskele
A temporary structure of tubes, boards and fittings erected to support workers and materials during construction, maintenance or repair of a building. It provides safe working platforms at heights that cannot be reached from the ground.
7 Workplace Hazard /ˈwɜːkpleɪs ˈhæzəd/ İşyeri Tehlikesi
Any condition, substance, activity or piece of equipment in a work environment with the potential to cause injury, illness or damage.
8 Lockout Tagout /ˈlɒkaʊt ˈtæɡaʊt/ Kilitle-Etiketle
A safety practice in which energy isolating devices are physically locked in the off position and labelled so that equipment cannot be restarted during servicing.
9 Hard Hat /hɑːd hæt/ Baret
A rigid protective helmet with an internal suspension harness that shields the head from falling objects, impact with fixed structures and, in some types, electrical contact.
10 Fire Safety /ˈfaɪə ˈseɪfti/ Yangın Güvenliği
The set of design measures, equipment and procedures intended to prevent fires from starting and to limit injury and damage when one does occur.
11 Fire Extinguisher /ˈfaɪər ɪkˈstɪŋɡwɪʃə/ Yangın Söndürücü
A portable pressurised container that discharges water, foam, powder, carbon dioxide or wet chemical to put out a small fire in its early stage.
12 Emergency Exit /ɪˈmɜːdʒənsi ˈeksɪt/ Acil Çıkış
A door or route reserved for leaving a building quickly during an incident, kept unlocked, unobstructed and clearly marked at all times.
13 Machine Guarding /məˈʃiːn ˈɡɑːdɪŋ/ Makine Koruyucuları
Physical barriers, covers or fences fitted to equipment to prevent contact with moving parts, ejected material or hot and electrically live surfaces.
14 Emergency Stop Button /ɪˈmɜːdʒənsi stɒp ˈbʌtən/ Acil Durdurma Butonu
A red mushroom-head control on a yellow background that, when pressed, brings hazardous machine movement to a halt as quickly as is safely possible.
15 Near Miss /nɪər mɪs/ Ramak kala olay
An unplanned event that could have caused injury or damage but did not, only because conditions or timing were favourable. It is treated as a free warning about a weak control.
16 Root Cause /ruːt kɔːz/ Kök neden
The fundamental organisational or technical failure whose removal prevents the event from recurring. It lies deeper than the immediate trigger and usually involves system, design or management weaknesses.
17 Corrective Action /kəˈrektɪv ˈækʃən/ Düzeltici faaliyet
A measure taken to eliminate the cause of a detected nonconformity or unwanted event so that it does not happen again. It responds to something that has already occurred.
18 Safety Data Sheet /ˈseɪfti ˈdeɪtə ʃiːt/ Güvenlik bilgi formu
A standardised sixteen-section document supplied with a chemical product that describes its hazards, handling precautions, exposure controls, physical properties and emergency measures. It is the primary information source for users.
19 Electrical Safety /ɪˈlektrɪkəl ˈseɪfti/ Elektrik güvenliği
The set of technical and organisational measures that protect people from shock, burns, arcing and fire caused by electrical energy. It covers design, installation, operation and maintenance.
20 Working at Height /ˈwɜːkɪŋ æt haɪt/ Yüksekte çalışma
Any work carried out where a person could fall a distance liable to cause injury, including work above, at or below ground level. It requires planning, supervision and suitable equipment.
21 Residual Current Device /rɪˈzɪdjuəl ˈkʌrənt dɪˈvaɪs/ Kaçak Akım Rölesi
A protective switch that continuously compares the current flowing out and returning in a circuit and disconnects supply when the difference exceeds a set threshold. It protects people against earth leakage and electrocution.
22 Insulation Resistance /ˌɪnsjʊˈleɪʃən rɪˈzɪstəns/ Yalıtım Direnci
The electrical resistance measured between conductors, or between a conductor and earth, through the insulating material separating them. A low value indicates moisture, contamination, or degraded insulation that could cause a fault.
23 Safe Isolation Procedure /seɪf ˌaɪsəˈleɪʃən prəˈsiːdʒə/ Güvenli Ayırma Prosedürü
A defined sequence for disconnecting equipment from every energy source, securing the disconnection, and proving the absence of voltage before work begins. Each step is documented and verified by the responsible person.
24 Safety Function /ˈseɪfti ˈfʌŋkʃən/ Güvenlik Fonksiyonu
A defined control action whose failure would immediately increase the risk of injury, for example stopping a drive when a gate opens. Each one is specified, assigned a required reliability level, and validated separately.
25 Safety Valve /ˈseɪfti vælv/ Emniyet Ventili
A spring-loaded device that opens automatically when system pressure reaches a preset value and recloses once pressure falls, discharging fluid to protect a vessel or pipeline. It is the final barrier against overpressure rupture.
26 Occupational Health /ˌɒkjʊˈpeɪʃənəl ˈhelθ/ İş Sağlığı
The multidisciplinary field concerned with protecting and promoting the physical and mental wellbeing of workers exposed to hazards arising from their job. It covers prevention, medical assessment and control of work-related illness.
27 Safety Management System /ˈseɪfti ˈmænɪdʒmənt ˈsɪstəm/ İş Güvenliği Yönetim Sistemi
A structured framework of policy, planning, roles, procedures, monitoring and review through which an organisation controls its safety risks. It follows a plan-do-check-act cycle and is usually certified against a recognised standard.
28 Incident Report /ˈɪnsɪdənt rɪˈpɔːt/ Olay Bildirim Raporu
The formal written record capturing what happened, when, where, who was involved and the immediate actions taken after an unplanned event. It is the starting document for investigation and statutory notification.
29 Anchor Point /ˈæŋkə pɔɪnt/ Ankraj noktası
A certified attachment location on a structure to which a lanyard or lifeline is connected. It must withstand the dynamic forces generated when a fall is arrested, with a large margin over the user's weight.
30 Safe Working Load /seɪf ˈwɜːkɪŋ ləʊd/ Güvenli çalışma yükü
The maximum load that a crane, sling or lifting structure is authorised to carry in a given configuration. It is set by applying a factor of safety to the failure load and is marked on the equipment.
31 Pressure Relief Valve /ˈpreʃə rɪˈliːf vælv/ Basınç Emniyet Ventili
A self-actuated device that opens automatically when the set pressure is reached, discharging fluid to limit the pressure in a vessel or pipe, and reseating when normal conditions return. Its capacity is sized for the governing overpressure scenario.
32 Flash Point /flæʃ pɔɪnt/ Parlama Noktası
The lowest temperature at which a liquid gives off enough vapour to form an ignitable mixture with air near its surface under specified test conditions. It is the primary criterion for classifying liquids as flammable or combustible.
33 Lower Explosive Limit /ˈləʊər ɪkˈspləʊsɪv ˈlɪmɪt/ Alt Patlama Sınırı (LEL)
The minimum concentration of a flammable gas or vapour in air below which the mixture is too lean to propagate a flame. Portable and fixed detectors usually display readings as a percentage of this value.
34 Flammable Liquid /ˈflæməbl̩ ˈlɪkwɪd/ Parlayıcı Sıvı (Yanıcı Sıvı)
A liquid whose flash point lies below a defined threshold, so that it can release ignitable vapour at or near normal working temperatures. Storage quantity, container type and ignition control are regulated for such liquids.
35 Hazard Identification /ˈhæzəd aɪˌdentɪfɪˈkeɪʃən/ Tehlike Belirleme
The systematic process of finding and listing all sources of potential harm in a workplace, process or design before they can cause an incident.
36 Hazard Control /ˈhæzəd kənˈtrəʊl/ Tehlike Kontrolü
Any measure taken to remove a source of harm or to reduce the exposure, frequency or severity of the damage it could cause.
37 Hierarchy of Controls /ˈhaɪərɑːki əv kənˈtrəʊlz/ Kontrol Hiyerarşisi
A ranked framework that orders protective measures from most to least effective, beginning with elimination and ending with personal protective equipment.
38 Engineering Control /ˌendʒɪˈnɪərɪŋ kənˈtrəʊl/ Mühendislik Önlemi
A physical or technical measure built into equipment or the workplace, such as guarding, ventilation or enclosure, that separates people from a source of harm.
39 Safe Work Procedure /seɪf wɜːk prəˈsiːdʒə/ Güvenli Çalışma Talimatı
A written step-by-step instruction describing how a specific task must be performed, including the hazards involved and the precautions required at each stage.
40 Permit to Work /ˈpɜːmɪt tə wɜːk/ Çalışma İzni
A formal written authorisation issued before high-risk work starts, stating the conditions, precautions and time limits under which the task may be carried out.
41 Confined Space Entry /kənˈfaɪnd speɪs ˈentri/ Kapalı Alana Giriş
The controlled process of allowing a worker into an enclosed area with restricted access where oxygen deficiency, toxic atmosphere or engulfment may occur.
42 Safety Goggles /ˈseɪfti ˈɡɒɡəlz/ Koruyucu Gözlük
Close-fitting eye protection that seals around the eye socket to guard against flying particles, liquid splashes and harmful dust or vapour.
43 Ear Protection /ɪə prəˈtekʃən/ Kulak Koruyucu
Devices such as earmuffs or earplugs worn to lower the sound level reaching the eardrum and to prevent permanent noise-induced hearing loss.
44 Respirator /ˈrespəreɪtə/ Solunum Koruyucu
A protective device covering the airways that filters contaminated air or supplies clean air so the wearer does not inhale harmful dust, gas or vapour.
45 Safety Harness /ˈseɪfti ˈhɑːnɪs/ Paraşüt Tipi Emniyet Kemeri
A body-worn assembly of straps that spreads arresting forces over the thighs, pelvis and shoulders and provides an attachment point for a fall protection lanyard.
46 Safety Boots /ˈseɪfti buːts/ İş Güvenliği Ayakkabısı
Protective footwear with a reinforced toecap, slip-resistant sole and often a penetration-resistant midsole, worn to prevent crushing, puncture and slipping injuries.
47 Protective Gloves /prəˈtektɪv ɡlʌvz/ Koruyucu Eldiven
Hand coverings selected for a specific hazard, giving resistance to cuts, heat, chemicals or vibration while still allowing the wearer adequate grip and dexterity.
48 Fire Alarm System /ˈfaɪər əˈlɑːm ˈsɪstəm/ Yangın Alarm Sistemi
An installation of detectors, manual call points, a control panel and sounders that senses a fire and warns occupants so they can leave in time.
49 Evacuation Plan /ɪˌvækjuˈeɪʃən plæn/ Tahliye Planı
A documented arrangement showing escape routes, exits, alarm points and responsibilities for moving every person from a building to a place of safety.
50 Assembly Point /əˈsembli pɔɪnt/ Toplanma Yeri
A designated safe location outside a building where people gather after leaving so that a head count can confirm everyone has escaped.
51 Warning Sign /ˈwɔːnɪŋ saɪn/ Uyarı İşareti
A triangular yellow sign carrying a black pictogram that alerts people to a specific hazard present in the area and the caution they must take.
52 Incident Investigation /ˈɪnsɪdənt ɪnˌvestɪˈɡeɪʃən/ Olay araştırması
A structured process of collecting evidence, reconstructing the sequence of events and identifying the failed controls behind an unwanted occurrence. Its purpose is prevention, not blame.
53 Preventive Action /prɪˈventɪv ˈækʃən/ Önleyici faaliyet
A measure taken to remove the cause of a potential problem before it ever occurs. It is driven by risk assessment and trend analysis rather than by an event that already happened.
54 Lost Time Injury /lɒst taɪm ˈɪndʒəri/ İş günü kaybına yol açan yaralanma
A work-related injury that prevents the affected worker from returning to their next scheduled shift. It is counted from the first full day of absence after the event.
55 Safety Culture /ˈseɪfti ˈkʌltʃə/ Güvenlik kültürü
The shared values, attitudes and behaviours that determine how an organisation actually handles risk in daily work. It shows in what people do when nobody is checking.
56 Safety Audit /ˈseɪfti ˈɔːdɪt/ İş güvenliği denetimi
A systematic and documented examination of whether safety arrangements comply with standards and work effectively in practice. It is planned, evidence-based and independent of the audited activity.
57 Safety Inspection /ˈseɪfti ɪnˈspekʃən/ İş güvenliği kontrolü
A physical check of a workplace, machine or activity against a defined checklist to detect unsafe conditions. It looks at the current state rather than at the management system behind it.
58 Chemical Safety /ˈkemɪkəl ˈseɪfti/ Kimyasal güvenliği
The body of practices that protect people and the environment from harm caused by handling, storing, transporting or disposing of chemical products. It combines classification, control measures and emergency planning.
59 Hazardous Substance /ˈhæzədəs ˈsʌbstəns/ Tehlikeli madde
Any material classified as capable of causing harm to health, safety or the environment because of its physical, chemical or toxicological properties. Classification triggers legal control duties.
60 Ventilation System /ˌventɪˈleɪʃən ˈsɪstəm/ Havalandırma sistemi
An arrangement of fans, ducts and openings that supplies fresh air and removes contaminated or overheated air from a workspace. It may operate generally or capture pollutants at source.
Engineering Safety terms — frequently asked questions
What are the most common Engineering Safety terms in English?
The 10 most frequently used Engineering Safety terms in the Engineering English library are Occupational Safety, Risk Assessment, Personal Protective Equipment, Incident, Accident, Scaffolding, Workplace Hazard, Lockout Tagout, Hard Hat, Fire Safety. This page lists the top 60 of 300 terms, ranked by usage frequency.
How many Engineering Safety terms are in the Engineering English app?
300. Each one includes an IPA pronunciation, a plain-English definition, a real example sentence and translations in 21 languages; the 60 most frequent are free to browse on this page.
How do you pronounce Engineering Safety terms in English?
Every term on this page shows its IPA transcription — for example Occupational Safety is pronounced /ˌɒkjʊˈpeɪʃənəl ˈseɪfti/, Risk Assessment is /rɪsk əˈsesmənt/ and Personal Protective Equipment is /ˈpɜːsənəl prəˈtektɪv ɪˈkwɪpmənt/. The Engineering English app also plays audio for each term and checks your pronunciation with speech recognition.
240 more Engineering Safety terms in the app
Get every term with example sentences, audio, 21-language translations, flashcards and AI practice.
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