The diesel engines on your general-purpose...

Question 1 / 2066636eef28f7522a1c51f979

Question 1 of 2066636eef28f7522a1c51f979

The diesel engines on your general-purpose supply vessel are all protected with dry-type air filters. The air filters should be inspected and replaced in accordance with manufacturer instructions. What is the generally accepted criteria that would dictate when filter replacement becomes necessary?

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🔍 Key Concepts

• Dry-type air filters on diesel engines and how they clog over time • Meaning of pressure drop across a filter element and what it tells you about restriction to airflow • How manufacturers specify a maximum allowable restriction or differential pressure for safe engine operation

💭 Think About

• When a dry-type air filter gets dirty, what happens to the resistance to airflow: does the pressure difference across the filter go up or down? • In normal operation, would you be more concerned about a rise or a fall in pressure difference across a partially blocked filter? Why? • Look at the words drop vs rise, and increases vs decreases in each answer. Which combination best matches what you’d expect as a filter plugs up?

✅ Before You Answer

• Identify which choices talk about pressure drop and which talk about pressure rise. Are both physically realistic for this situation? • Think about how a dirty/clogged filter affects air flow and manifold pressure. Does that lead to a higher or lower differential pressure across the filter? • Confirm that the trigger point is when a specified limit (maximum or minimum) set by the manufacturer is exceeded in the direction that indicates too much restriction.

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Question 1 of 20

The air filter element should be replaced when the pressure drop across the element increases above the specified maximum.

The air filter element should be replaced when the pressure rise across the element decreases below the specified minimum.

The air filter element should be replaced when the pressure drop across the element decreases below the specified minimum.

The air filter element should be replaced when the pressure rise across the element increases above the specified maximum.

Question 1 / 2066636eef28f7522a1c51f979

Question 1 of 2066636eef28f7522a1c51f979

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Question 1 of 20

66636eef28f7522a1c51f979

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🔍 Key Concepts

💭 Think About

✅ Before You Answer

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