A diesel engine exposed to widely varying...

Question 1 / 205eccefa2bacbc34ba4d478e7

Question 1 of 205eccefa2bacbc34ba4d478e7

A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with __________.

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Question 1 of 20

5eccefa2bacbc34ba4d478e7

A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with __________.

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🔍 Key Concepts

• viscosity index and what it tells you about how oil thickness changes with temperature • how diesel engine lubricating oil must perform in both cold starts and normal operating temperature • difference between viscosity index and additives like extreme-pressure agents

💭 Think About

• Think about what happens to most oils when the temperature drops very low or rises very high. How does their thickness usually change? • For an engine that will see very cold and very hot ambient conditions, what property do you want in the oil’s viscosity behavior as temperature changes—large change or small change? • Which of the listed choices directly describes how stable viscosity is across a temperature range, rather than adding special chemical properties?

✅ Before You Answer

• Make sure you know that viscosity index is a measure of how much an oil’s viscosity changes with temperature. • Check which option refers to the oil’s behavior over temperature range, not to special additives for gear loads or wear. • Ask: for widely varying temperatures, do we want viscosity to change a lot with temperature, or stay relatively stable? Then match that idea to the correct index choice.

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Question 1 of 20

A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with __________.

a high viscosity index

a low viscosity index

extreme pressure additives

no additives

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Question 1 / 205eccefa2bacbc34ba4d478e7

Question 1 of 205eccefa2bacbc34ba4d478e7

A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d478e7

A diesel engine exposed to widely varying ambient temperatures should use a lubricating oil with __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed