Q. Which of the following difference between Octane number and Cetane number is/are correct?

1. Octane number indicates the performance of fuel whereas cetane number indicates the ignition properties of a fuel.
2. Octane rating is used for gasoline whereas cetane rating is used for diesel fuel.
3. Octane rating determines the delay in fuel ignition whereas the cetane rating determines the anti-knock rate of a fuel.

Choose the correct answer using the codes given below:
Answer: Only 1 & 2
Notes: Octane number measures gasoline performance and anti-knock properties, while cetane number assesses diesel ignition characteristics. Iso-octane is the standard for 100 in octane ratings, indicating minimal knocking, and heptane represents 0, indicating maximum knocking. In cetane ratings, cetane is the benchmark at 100 due to its rapid combustion.

This question is part of 40000+ MCQs GKToday PCS Mock Tests Series in GKToday Android app. Question Number: 97 in GKToday PCS Mock Test - 20 in above course in App.