Valves and fittings used with diesel engine...

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Question 1 of 205eccefa2bacbc34ba4d477d9

Valves and fittings used with diesel engine fuel oil pressure piping may be threaded in sizes up to and including 60 mm O.D., but screwed unions __________.

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Question 1 of 20

5eccefa2bacbc34ba4d477d9

Valves and fittings used with diesel engine fuel oil pressure piping may be threaded in sizes up to and including 60 mm O.D., but screwed unions __________.

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🔍 Key Concepts

• 46 CFR requirements for diesel engine fuel oil piping systems • Difference between threaded valves/fittings and screwed unions • Why administration may restrict unions on higher‑diameter pressure lines

💭 Think About

• Consider why regulations might treat screwed unions differently from other threaded fittings in fuel oil pressure lines • Ask yourself what could happen at a union in a high‑pressure, larger‑diameter line if there is vibration or thermal movement • Compare the choices: which ones are allowing unions on larger sizes vs. restricting them, and which is more consistent with a conservative safety approach?

✅ Before You Answer

• Verify the maximum outside diameter (O.D.) at which screwed unions are allowed on fuel oil pressure lines in 46 CFR • Check whether the regulation encourages or discourages unions on lines 33 mm O.D. and over • Confirm if there is any special mention of unions in areas of vibration or movement versus a simple size‑based prohibition

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Question 1 of 205eccefa2bacbc34ba4d477d9

Valves and fittings used with diesel engine fuel oil pressure piping may be threaded in sizes up to and including 60 mm O.D., but screwed unions __________.

Back

Question 1 of 20

5eccefa2bacbc34ba4d477d9

Valves and fittings used with diesel engine fuel oil pressure piping may be threaded in sizes up to and including 60 mm O.D., but screwed unions __________.

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

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