Unit 10 (Course Intro) / Unit 20 (Fluids)

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28 Terms

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Nuclear powered steam

SSBN

<p>SSBN</p>
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Nuclear powered steam

SSN

<p>SSN</p>
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Nuclear powered steam

CVN

<p>CVN</p>
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Diesel engine only

Joint Light Tactical Vehicle (JLTV) used by Marine Corps infantry

<p>Joint Light Tactical Vehicle (JLTV) used by Marine Corps infantry</p>
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<p>Combination of <strong>diesel</strong> engines and <strong>turboshafts</strong></p>

Combination of diesel engines and turboshafts

Frigate

<p>Frigate</p>
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<p><strong>Turbofan</strong></p>

Turbofan

F-35 Lightning II

<p>F-35 Lightning II</p>
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<p><strong>Turboshaft</strong> only</p>

Turboshaft only

MH-60R Seahawk

<p>MH-60R Seahawk</p>
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Turboprop

knowt flashcard image
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gage pressure (psig)

The number of lbf/in2 the system’s pressure is above atmospheric pressure.

  • above the line

<p>The number of lbf/in<sup>2</sup> the system’s pressure is <strong><u>above</u> </strong>atmospheric pressure.</p><ul><li><p>above the line</p></li></ul><p></p>
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vacuum pressure (psiv)

The number of lbf/in2 the system’s pressure is below atmospheric pressure.

  • below the line

<p>The number of lbf/in<sup>2</sup> the system’s pressure is <strong><u>below</u></strong> atmospheric pressure.</p><ul><li><p>below the line</p></li></ul><p></p>
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differential pressure (psid)

The number of lbf/in2 between the pressure of two different systems.

  • difference between two arbitrary points

<p>The number of lbf/in<sup>2</sup> <strong><u>between</u></strong> the pressure of two different systems.</p><ul><li><p>difference between two arbitrary points</p></li></ul><p></p>
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psia

The number of lbf/in2 the system’s pressure is above a perfect vacuum.

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inHg

Usually reserved to describe barometric pressure or vacuum pressure.

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<p>density</p>

density

mass per unit volume

<p>mass per unit volume</p>
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<p>specific volume</p>

specific volume

inverse of density

<p><span style="background-color: transparent;"><span>inverse of density</span></span></p>
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<p>specific weight</p>

specific weight

weight per unit volume

<p>weight per unit volume</p>
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specific gravity (SG)

ratio of the density of a fluid to the density of freshwater

<p><span style="background-color: transparent;"><span>ratio of the density of a fluid to the density of freshwater</span></span></p>
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Pascal’s Law

a change in pressure at any point in a confined incompressible static fluid is transmitted undiminished to every point in the fluid

  • an increase in pressure at one location causes the same increase everywhere in the fluid

  • Fsmall / Asmall = FLarge / ALarge

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incompressible

density of the fluid is constant

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confined

fluid is in container and not free to move

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large tank approximation

  • The assumption that the velocity is zero at the surface of a filling or draining tank.

  • Tanks have such a large cross sectional area that the velocity in the tank is effectively zero.

  • Bathtub drain: Water is moving, but the velocity on the surface is imperceptible.

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gate valve

stop flow

  • specializes in isolation; offers the least resistance when open

  • can be easily damaged when used as a throttle valve

<p><strong><em><u>stop flow</u></em></strong></p><ul><li><p>specializes in <strong><u>isolation</u></strong>; offers the least resistance when open</p></li><li><p>can be <strong>easily damaged</strong> when used as a <strong>throttle</strong> valve</p></li></ul><p></p>
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globe valve

majority of navy valves are this type due to its versatile design

<p>majority of navy valves are this type due to its <strong>versatile</strong> design</p>
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needle valve

best used as a throttle valve and can be used to precisely control flow

<p>best used as a <strong>throttle</strong> valve and can be used to <strong>precisely control</strong> <strong>flow</strong></p>
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<p>ball valve</p>

ball valve

  • typically an inexpensive valve that can be operated quickly with a 90° turn

  • uses a bored out ball to open/close the passage

<ul><li><p>typically an inexpensive valve that can be operated quickly with a 90° turn</p></li><li><p>uses a <strong>bored out ball</strong> to open/close the passage</p></li></ul><p></p>
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swing check valve

allows flow in only one direction

  • no backflow

  • you cannot check the position

<p><strong><em>allows flow in only <u>one direction</u></em></strong></p><ul><li><p>no backflow</p></li><li><p>you cannot check the position</p></li></ul><p></p>
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relief valve

  • prevents system pressure from exceeding a limit

  • prevents over pressure condition

<ul><li><p>prevents system pressure from exceeding a limit</p></li><li><p>prevents <strong>over pressure condition</strong></p></li></ul><p></p>
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<p>butterfly valve</p>

butterfly valve

typically an inexpensive valve that uses a round-disc shaped closure member that is rotated in 90-degree increments to open or close the passage

<p>typically an inexpensive valve that uses a round-disc shaped closure member that is rotated in 90-degree increments to open or close the passage</p>