GREEN ENGINEERING APPROACHES STUDY
GUIDE COMPREHENSIVE REVIEW WITH
SOLVED QUESTIONS 2026
◉What are some limitations in the effectiveness of green engineering?
Answer: 1. The "layers of protection" approach is expensive to build and
maintain
2. There is still the finite risk that an accident will occur despite the
layers of protection
◉What are the 4 generalised approaches for safer design? Answer:
Minimise (Use smaller quantities of hazardous materials)
Substitute (Use less hazardous materials than more hazardous materials)
Moderate (Use less hazardous conditions/facilities which minimise the
impacts of hazardous material release)
Simplify (design facilities which eliminate unnecessary complexity and
make operating errors less likely)
, ◉What is Green Engineering? Answer: An engineering led approach to
sustainability. A set of processes and products that allow us to create
engineering solutions whilst actively considering the impacts on the
environment, economy and social standards
◉Name 4 Principles of Green Engineering. Answer: 1. Ensure non-
hazardous materials where possible
2. Prevent waste rather than need to treat/clean it up
3. Separation/purification operations are designed to minimize energy
consumption and materials use
4. Products, processes, and systems should be designed to maximize
mass, energy, space, and time efficiency through process intensification
5. Systems should be "output pulled" rather than "input pushed"
6. Only be complex if it's worth the investment
7. Targeted durability, not immortality, should be a design goal
8. Minimise excess
9. Material diversity in multi component products to be minimised
10. Integration and interconnectivity is necessary with energy and
material flows
11. Materials/energy inputs should be renewable
12. Systems designed for performance in "after life"
◉Name 4 of the principles of Green Chemistry. Answer: 1. Prevent
waste
GUIDE COMPREHENSIVE REVIEW WITH
SOLVED QUESTIONS 2026
◉What are some limitations in the effectiveness of green engineering?
Answer: 1. The "layers of protection" approach is expensive to build and
maintain
2. There is still the finite risk that an accident will occur despite the
layers of protection
◉What are the 4 generalised approaches for safer design? Answer:
Minimise (Use smaller quantities of hazardous materials)
Substitute (Use less hazardous materials than more hazardous materials)
Moderate (Use less hazardous conditions/facilities which minimise the
impacts of hazardous material release)
Simplify (design facilities which eliminate unnecessary complexity and
make operating errors less likely)
, ◉What is Green Engineering? Answer: An engineering led approach to
sustainability. A set of processes and products that allow us to create
engineering solutions whilst actively considering the impacts on the
environment, economy and social standards
◉Name 4 Principles of Green Engineering. Answer: 1. Ensure non-
hazardous materials where possible
2. Prevent waste rather than need to treat/clean it up
3. Separation/purification operations are designed to minimize energy
consumption and materials use
4. Products, processes, and systems should be designed to maximize
mass, energy, space, and time efficiency through process intensification
5. Systems should be "output pulled" rather than "input pushed"
6. Only be complex if it's worth the investment
7. Targeted durability, not immortality, should be a design goal
8. Minimise excess
9. Material diversity in multi component products to be minimised
10. Integration and interconnectivity is necessary with energy and
material flows
11. Materials/energy inputs should be renewable
12. Systems designed for performance in "after life"
◉Name 4 of the principles of Green Chemistry. Answer: 1. Prevent
waste
