Practice - Equivalence ratio (ϕ)
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Practice Questions
Test your understanding with targeted questions
What defines a lean mixture in terms of the equivalence ratio?
💡 Hint: Think about the balance between fuel and air.
What does it mean if ϕ is greater than 1?
💡 Hint: Consider what happens when there is more fuel.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What does an equivalence ratio (ϕ) of less than 1 indicate?
💡 Hint: Consider the meaning of 'lean' in the context of combustion.
True or False: An equivalence ratio greater than 1 results in more complete combustion.
💡 Hint: Think about combustion efficiency and fuel balance.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
Given that an engine runs at a stoichiometric AFR of 14.7 and the actual AFR is 10.5, calculate the equivalence ratio and explain the implications for combustion efficiency.
💡 Hint: Clarify the effects of having a rich mixture on emissions and performance.
If a specific combustion system operates with an equivalence ratio of 0.8, what could be some potential issues in terms of exhaust emissions and engine performance?
💡 Hint: Consider the balance of air and fuel and how that affects combustion chemistry.
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