A main propulsion diesel engine is fitted...

Question 1 / 205eccefa1bacbc34ba4d47709

Question 1 of 205eccefa1bacbc34ba4d47709

A main propulsion diesel engine is fitted with a pneumatically actuated governor, having an operating range of 10 to 60 psig. The current fuel rack setting is 15 mm at 30 psig. If the air pressure to the governor is increased to 40 psig, the fuel rack setting will change to __________.

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🔍 Key Concepts

• Linear relationship between governor control air pressure and fuel rack position over its operating range • How to find the slope (change in rack per psi) from the data given • Checking if the new pressure is higher or lower than the original, and what that does to fuel quantity

💭 Think About

• What is the total pressure range of the governor, and how much of that range is being used in the example from 30 psig to 40 psig? • From the given rack setting at 30 psig, how can you estimate how much the rack would move for each 1 psi change, assuming a straight-line relationship? • If air pressure to this type of governor is increased, does that usually correspond to more or less fuel, and therefore a larger or smaller rack setting?

✅ Before You Answer

• Assume a proportional (linear) relationship unless the question states otherwise • Be sure you are measuring from the correct reference point in the pressure range (start of range vs. current operating point) • Confirm that your final rack value is reasonable in direction: should it be greater than, less than, or equal to 15 mm when pressure rises from 30 to 40 psig?

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Question 1 of 20

10 mm

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Question 1 / 205eccefa1bacbc34ba4d47709

Question 1 of 205eccefa1bacbc34ba4d47709

Back

Question 1 of 20

5eccefa1bacbc34ba4d47709

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?

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