Practice Fuel Quality - 7.2 | Air Quality & Air Pollution | Environmental Engineering
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Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does octane number measure?

💡 Hint: Think of SI engines and the sounds they make.

Question 2

Easy

What is cetane number associated with?

💡 Hint: Consider which type of engine diesel belongs to.

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 main purpose of the octane number in fuel?

  • A measure of diesel fuel quality
  • Resistance to knocking
  • Ignition timing

💡 Hint: Consider which type of engine the octane number is important for.

Question 2

True or False: Higher cetane numbers in diesel fuel lead to delayed ignition.

  • True
  • False

💡 Hint: Think about why quick ignition matters in diesel engines.

Solve 2 more questions and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Analyze how changing octane levels in a spark ignition engine affects the environmental emissions produced annually. Provide a detailed effect on NOx and CO levels.

💡 Hint: Consider how combustion efficiency correlates with emission generation.

Question 2

A fleet of trucks uses diesel fuel with a cetane number of 40. Propose how using a higher quality fuel with a cetane number of 55 might impact their emissions and performance. Support your argument with specific comparisons.

💡 Hint: Relate cetane number directly to combustion timing and pollutant creation.

Challenge and get performance evaluation