A mixture of 45% cetane and 55%...

Question 1 of 270705eccefa2bacbc34ba4d47783

A mixture of 45% cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil. The sample can be described as having a/an __________.

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Question 1 of 27070

Q

A mixture of 45% cetane and 55% alpha-methyl-naphthalene is found to have the same ignition delay as a sample of diesel oil. The sample can be described as having a/an __________.

🔍 Key Concepts

• Cetane number as a measure of ignition quality in diesel fuels • What it means when a test mixture has the same ignition delay as a reference fuel • The difference between cetane number (diesel) and octane number (gasoline)

💭 Think About

• In fuel rating scales, does the number usually match the percentage of a key reference component in the mixture? • Is cetane number used for diesel or gasoline? What about octane number? • If the ignition delay of the diesel sample matches a mixture of two reference fuels, how is the rating assigned from that mixture?

✅ Before You Answer

• Be sure whether cetane number applies to diesel or gasoline. • Check which part of the mixture (45% vs 55%) corresponds to the high-ignition-quality reference fuel (cetane). • Verify whether the rating follows the percentage of cetane or the percentage of the other component in the mixture.