Pressure-vacuum relief valves, as used on...

Question 1 / 205eccef9cbacbc34ba4d45c15

Question 1 of 205eccef9cbacbc34ba4d45c15

Pressure-vacuum relief valves, as used on tank vessels, are usually set to operate at two points, ______.

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Question 1 of 20

5eccef9cbacbc34ba4d45c15

Pressure-vacuum relief valves, as used on tank vessels, are usually set to operate at two points, ______.

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🔍 Key Concepts

• Pressure-vacuum relief valves purpose on tank vessels (protecting cargo tanks from overpressure and excessive vacuum) • Typical pressure setting (psig) and vacuum setting (inches of water or inches of vacuum) used in cargo tank protection systems • Relationship of settings to atmospheric pressure (psia) and structural limits of the tank

💭 Think About

• Which option shows one value clearly related to vacuum and one value clearly related to positive pressure? • Think about whether these valves are intended to open only when pressure is above atmospheric, only when below atmospheric, or at both conditions. • Which units and magnitudes look realistic for protecting thin‑plated cargo tanks from damage during loading, discharging, or thermal expansion/contraction?

✅ Before You Answer

• Be sure one setting is for vacuum protection (tank being sucked in) and one is for overpressure protection (tank bulging out). • Check that the units make sense: psia vs psig vs inches of vacuum – which are normally used for vacuum vs pressure on tank vents? • Verify that the chosen values are practical for tank structure (not so high that the tank would fail, not so low that the valve is always lifting).

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Question 1 of 20

Pressure-vacuum relief valves, as used on tank vessels, are usually set to operate at two points, ______.

14.2 psia; 2 psig

any two points below atmospheric pressure

26 inches of vacuum; 5 psig

any two points above atmospheric pressure

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Question 1 / 205eccef9cbacbc34ba4d45c15

Question 1 of 205eccef9cbacbc34ba4d45c15

Pressure-vacuum relief valves, as used on tank vessels, are usually set to operate at two points, ______.

Back

Question 1 of 20

5eccef9cbacbc34ba4d45c15

Pressure-vacuum relief valves, as used on tank vessels, are usually set to operate at two points, ______.

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