--- title: "Safety first in engineering delivery" subject: "Engineering Professional Practice" chapter: 2 key: "semester_8/engineering_professional_practice:safety-first-engineering" source: https://www.bctengineer.com/q/semester_8/engineering_professional_practice/safety-first-engineering site: BCT Engineering --- # Safety first in engineering delivery Engineering Professional Practice · Chapter 2: Profession and Ethics - Asked in: 2072 Asoj, 8 marks - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_8/engineering_professional_practice/safety-first-engineering - Whole chapter: https://www.bctengineer.com/md/semester_8/engineering_professional_practice/chapter-2 ## Question "Engineering profession always emphasizes on safety first in engineering delivery". Describe with typical examples. ## Short answer Safety comes first because the public cannot judge engineering safety and failures can kill many people, so codes make public safety paramount. Engineers ensure safety through design factors, codes, risk assessment, supervision, and whistle blowing. Examples like Tacoma Narrows, Challenger, Rana Plaza, and the 2015 Nepal earthquake show the need for standards and review. ## Answer Engineering products such as buildings, bridges, machines, power plants and software are used by the public, who cannot judge their safety. Failure can kill many people and destroy property. Therefore codes of ethics (including that of Nepal Engineering Council) make "public safety, health and welfare paramount" the first duty of an engineer. #### Reasons safety comes first - Human life and health have the highest value; loss is irreversible. - Engineers hold special knowledge, so society trusts them. - Legal duty: negligence, liability and loss of licence follow unsafe work. - Safe works are cheaper over the life cycle; failure costs more than prevention. - Professional reputation and public trust depend on it. #### How safety is ensured Safety factors in design; codes and standards (Nepal National Building Code); risk assessment; quality materials and testing; supervision and inspection; occupational safety at site; fail-safe and redundancy; emergency plans; whistle blowing when danger is seen. #### Typical examples 1. **Tacoma Narrows Bridge (USA, 1940):** ignored aerodynamic effects; collapsed in wind. Lesson: consider all loads. 2. **Challenger shuttle (1986):** engineers warned about O-ring failure in cold, but management launched; 7 died. Lesson: safety concerns of engineers must not be overruled by schedule pressure. 3. **Hyatt Regency walkway collapse (USA, 1981):** a design change in connections was not checked; 114 died. Lesson: review all changes. 4. **Rana Plaza (Bangladesh, 2013):** illegal floors on weak building; over 1100 died. 5. **Bhopal gas leak (India, 1984) and Chernobyl (1986):** weak safety systems and operation. 6. **Nepal, 2015 Gorkha earthquake:** non-engineered buildings collapsed, while buildings designed to the code largely survived; shows value of building code compliance. An engineer must refuse unsafe orders, report risks and follow standards even at personal cost. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. Why is public safety the first duty of an engineer? A. Safety work is always cheaper at construction time than any other work B. It is only a matter of company policy C. Engineers are exempt from liability if safety is stated D. The public cannot judge the safety of engineering products and failure can cause irreversible loss of life Answer: D. Society trusts engineers' special knowledge, and loss of life is irreversible. (Key point: Why safety first) 2. What was the lesson of the Challenger disaster (1986)? A. Engineers' safety warnings must not be overruled by schedule pressure B. Aerodynamic effects of wind must be considered C. Design changes in connections must be reviewed D. Illegal floors weaken buildings Answer: A. Engineers warned about O-ring failure in cold, but management launched; 7 died. (Key point: Challenger lesson) 3. What caused the Hyatt Regency walkway collapse (1981), and what does it teach? A. Wind-induced vibration; consider all loads B. An unchecked design change in connections; all changes must be reviewed C. Illegal extra floors; follow bylaws D. O-ring failure; heed warnings Answer: B. A connection design change was not checked, and 114 died. (Key point: Hyatt Regency lesson) 4. How does safety relate to cost over the life cycle? A. Safety measures always make a project uneconomic B. Cost and safety are unrelated C. Safe works are cheaper over the life cycle because failure costs more than prevention D. Only initial cost matters Answer: C. Failure losses exceed prevention costs, so safe works are cheaper in the long run. (Key point: Cost of safety) ## Related in Engineering Professional Practice - [Short note: Impact of engineering profession](https://www.bctengineer.com/question.md?key=semester_8%2Fengineering_professional_practice%3Aimpact-engineering-profession) — Engineering Professional Practice, chapter 1 - [Practical engineering profession; organizations](https://www.bctengineer.com/question.md?key=semester_8%2Fengineering_professional_practice%3Apractical-profession-organizations) — Engineering Professional Practice, chapter 3 - [Globalization, PPP, conflict, safety engineering](https://www.bctengineer.com/question.md?key=semester_8%2Fengineering_professional_practice%3Aglobalization-ppp-conflict-safety) — Engineering Professional Practice, chapter 6 - [Profession and its characteristics](https://www.bctengineer.com/question.md?key=semester_8%2Fengineering_professional_practice%3Aprofession-characteristics) — Engineering Professional Practice, chapter 2, asked 3× - [Profession characteristics, core values, vicarious liability](https://www.bctengineer.com/question.md?key=semester_8%2Fengineering_professional_practice%3Aprofession-characteristics-core-values-vicarious) — Engineering Professional Practice, chapter 2 - [Profession, code of ethics, tort and liability](https://www.bctengineer.com/question.md?key=semester_8%2Fengineering_professional_practice%3Aprofession-code-ethics-tort) — Engineering Professional Practice, chapter 2 ## Related in other subjects - [Fire safety features; first flush in RWH](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Afirst-flush-fire-safety) — Building Technology, chapter 12 - [Transition elements; first series configuration](https://www.bctengineer.com/question.md?key=semester_2%2Fengineering_chemistry%3Awhy-transition-elements-typical) — Engineering Chemistry, chapter 5 - [Typical cross-sections of hill roads](https://www.bctengineer.com/question.md?key=semester_6%2Ftransportation_engineering_i%3Ahill-cross-sections) — Transportation Engineering I, chapter 5, asked 9× - [Typical water supply system and components](https://www.bctengineer.com/question.md?key=semester_5%2Fwater_supply_engineering%3Atypical-ws-system-components) — Water Supply Engineering, chapter 1, asked 4×