What is measured as a differential pressure drop across an opening in the feedwater supply piping?

Prepare for the Machinist's Mate (MM) "A" School Test 3. Study with our extensive collection of flashcards and multiple-choice questions, complete with hints and explanations to ensure you're ready for the exam.

Multiple Choice

What is measured as a differential pressure drop across an opening in the feedwater supply piping?

Explanation:
The differential pressure across a restriction in the feedwater line is used to determine how much water is flowing. When fluid passes through a small opening, its velocity increases and the static pressure drops across that restriction. The larger the flow, the greater the pressure drop. By applying the fluid-flow relationship for an orifice or similar restriction, you convert that pressure difference into a flow rate. That’s why this measurement is a way to gauge feedwater flow rate. It isn’t a direct measure of temperature, system pressure, or conductivity, which would require different sensors.

The differential pressure across a restriction in the feedwater line is used to determine how much water is flowing. When fluid passes through a small opening, its velocity increases and the static pressure drops across that restriction. The larger the flow, the greater the pressure drop. By applying the fluid-flow relationship for an orifice or similar restriction, you convert that pressure difference into a flow rate. That’s why this measurement is a way to gauge feedwater flow rate. It isn’t a direct measure of temperature, system pressure, or conductivity, which would require different sensors.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy