If the instrument sensing element, shown in...

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Question 1 of 205eccefa2bacbc34ba4d47b5f

If the instrument sensing element, shown in the illustration, became coated with foreign matter, which of the listed conditions would be likely to occur? See illustration MO-0075.

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Question 1 of 20

5eccefa2bacbc34ba4d47b5f

If the instrument sensing element, shown in the illustration, became coated with foreign matter, which of the listed conditions would be likely to occur? See illustration MO-0075.

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🔍 Key Concepts

• Pyrometer operation – how the sensing element measures exhaust gas temperature by direct contact with hot gases. • Effect of insulation or coating on a temperature-sensing element (response time, accuracy, heat transfer). • Difference between instrument damage and measurement error when an element is fouled or dirty.

💭 Think About

• Ask yourself what happens to heat transfer if the sensing tip is covered with soot or foreign material – does it see more, less, or slower heat from the exhaust gas? • Consider whether a layer of deposit is more likely to instantly break parts, slowly overheat the engine, or mainly affect what the instrument “thinks” the temperature is. • Look at the illustration: which part is directly in the gas flow, and what is that part’s primary role in the system?

✅ Before You Answer

• Verify which component in the illustration is the sensing element and that it is directly exposed to exhaust gas flow. • Decide whether a coating would act more like thermal insulation or like a heat sink that improves conduction. • Double‑check which option describes a change in indication versus physical damage to components.

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Question 1 of 205eccefa2bacbc34ba4d47b5f

If the instrument sensing element, shown in the illustration, became coated with foreign matter, which of the listed conditions would be likely to occur? See illustration MO-0075.

Back

Question 1 of 20

5eccefa2bacbc34ba4d47b5f

If the instrument sensing element, shown in the illustration, became coated with foreign matter, which of the listed conditions would be likely to occur? See illustration MO-0075.

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

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