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21 Cards in this Set
- Front
- Back
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Define Charle's Law
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At a constant pressure, the volume of a gas varies directly with the absolute temperature, and at a constant volume, the pressure of a gas varies directly the absolute temperature.
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Define Boyle's Law
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The volume of a gas varies inversely with the absolute pressure, provided the temperature remains constant.
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Define compressive stress.
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When two forces act from opposite directions, pushing toward the center of an object.
Fire tubes in a fire tube boiler are subjected to compressive stress. |
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Define Shear Stress
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When two forces act in parallel to each other but in opposite directions
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Define Tensile Stress
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When two forces act on an object, pulling in opposite directions.
Affects boiler plates and staybolts. |
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Define: Lever
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A rigid bar that pivots about one point (the fulcrum) and that is used to move an object at a second point by a force applied at a third.
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Define: torque
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A twisting force that tends to cause rotation.
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Define: saturated steam
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Steam at the temperature of the boiling point which corresponds to its pressure.
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Define: sensible heat
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Heat that causes a change in temperature.
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Define: latent heat
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Heat energy that is absorbed or rejected when a substance is changing state and there is no change in temperature.
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Define: enthalpy
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The total heat in the steam. (from a reference point of a given starting temperature)
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Formula: Area of a rectangle
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Area = w × h
w = width h = height |
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Formula: Area of a circle
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Area = πr^2
r = radius |
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Formula: Circumference of a circle
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Circumference = 2πr
r = radius |
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Formula: Area of a cylinder
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Area = 2(πr^2) + (2πr)h
r = radius h = height |
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Formula: Volume of a cylinder
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Volume = πr^2h
r = radius h = height |
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Formula: °F to °C
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°C = 5/9 (°F - 32)
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Formula: °C to °F
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°F = 9/5°C + 32
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Formula: °F to Rankine
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°R = °F + 460
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Formula: °C to Kelvin
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°K = °C + 273
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Formula: Btu to Ft-lb
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Ft-lb = Btu x 778
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