Which of the following statements is correct...

Which of the following statements is correct...

Question 1 of 270705eccefa1bacbc34ba4d4720f

Which of the following statements is correct regarding an oil with a high viscosity index?

Question 1 of 27070

Q

Which of the following statements is correct regarding an oil with a high viscosity index?

🔍 Key Concepts

• Viscosity: how thick or thin an oil is and how easily it flows • Viscosity index (VI): a measure of how much an oil’s viscosity changes with temperature • Effect of temperature on oil: most oils get thinner as temperature increases

💭 Think About

• Think about what engineers want from a high viscosity index oil in an engine that runs from cold start to hot operation. • If an oil has a high viscosity index, does its thickness change a lot or a little when the temperature changes? • Consider which option best matches the idea of oil keeping almost the same thickness over a wide temperature range.

✅ Before You Answer

• Identify which choice describes small viscosity change over large temperature change. • Eliminate any option that suggests no change at all, since all real oils change some with temperature. • Eliminate any option that says the oil gets thicker when heated, since most oils get thinner as temperature increases.