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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define stoichiometric air-fuel ratio (AFR).
π‘ Hint: It indicates the balance necessary for burning fuel.
Question 2
Easy
What does excess air refer to?
π‘ Hint: Consider what happens when more air is added than necessary.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the stoichiometric air-fuel ratio?
- The ratio that ensures complete combustion
- The percentage of air in combustion
- The amount of fuel burned
π‘ Hint: Focus on what it means for fuel usage.
Question 2
True or False: Excess air is beneficial at all times.
- True
- False
π‘ Hint: Consider how air supply impacts combustion.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If a combustion engine operates at a stoichiometric AFR of 14.7:1 and the actual supplied air is 35.4 kg for 2.4 kg of fuel, what is the equivalence ratio?
π‘ Hint: Determine stoichiometric air first, then find the equivalence ratio.
Question 2
A furnace uses 12 kg of air to burn 1 kg of coal. If the actual supply of air is 14 kg, calculate the excess air and discuss its effects on combustion.
π‘ Hint: Use the excess air formula and consider the combustion implications.
Challenge and get performance evaluation