Practice Fuel Quality (7.2) - Air Quality & Air Pollution - Environmental Engineering

Practice: Fuel Quality

Lesson 7.2Air Quality & Air Pollution

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10 questions

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3 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
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6 sample questions

Question 1.
What does octane number measure?
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Think of SI engines and the sounds they make.
Question 2.
What is cetane number associated with?
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Consider which type of engine diesel belongs to.
3Question 3.
What is the main purpose of the octane number in fuel?
- A measure of diesel fuel quality
- Resistance to knocking
- Ignition timing
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Consider which type of engine the octane number is important for.
4Question 4.
True or False: Higher cetane numbers in diesel fuel lead to delayed ignition.
- True
- False
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Think about why quick ignition matters in diesel engines.
Question 5.
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.
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Consider how combustion efficiency correlates with emission generation.
Question 6.
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.
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Relate cetane number directly to combustion timing and pollutant creation.

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