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56 Cards in this Set
- Front
- Back
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Force equals mass times what?
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Acceleration
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A ______ is used to measure density/specific gravity in liquids.
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Hydrometer
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Two types of fluids:
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Hydraulic and pneumatic
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Are gasses compressible?
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Yes
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Are liquids compressible?
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No
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The weight density of water is:
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62.4 lbs/ft^3
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______ measures voltage difference?
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Voltmeters
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Multimeters measure voltage, _____, and resistance.
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Amperage
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Electrical circuits contain:
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A source, conductors, and a load.
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______ is the measure of the average energy of motion of molecules in a substance.
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Tempature
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_____ _______ acts as a prime mover in thermal systems because heat aways moves from warmer region to cooler regions.
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Tempature Difference
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Pressure increases with depth in a fluid but its ______ of volume.
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Independent
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Torque is measured in:
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Newton meters or Pound feet
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Pressure is measured by dividing a unit of force by a unit of?
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Area
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Voltage comes in two forms:
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Direct and Alternating
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Work =
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Force times distance
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____ ____ is the work going into a system.
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Input work
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____ ____ is the work done by the system.
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Output work
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Spring scales are used to measure:
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Input and output force
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Linear mechanical work is performed when:
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A mass is moved in a straight line
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Angular mechanical work is performed when:
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A massis moved around an axis or rotation
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Fluid work is equal to:
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The pressure difference times the volume moved
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You must know the ______ _____ of the fluid in order to calculate fluid work.
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Weight Density
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In a closed fluid system, is the fluid reused?
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Yes
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There is no such thing as:
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Linear or agular fluid work
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Electrical work is done when a voltage moves a specific amount of:
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Electrical Charge
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A coulumb is a quanity of charge equal to:
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6.25 times 10^18 electrons
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Coulumbs are symbolized by what?
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Q
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What is the basic unit of electrical work?
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Joule
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1 joule =
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1 volt* coulumb
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A rate is a dusplacement like quanity divided by:
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Elasped time
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Velocity=
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The measure of linear mechanical work
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Velocity is a _____. Meaning that is is accompanied by a direction.
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Vector
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____ is similar to velocity.
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Speed
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Is speed scalar or non scalar?
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Scalar
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What are the units of linear mechanical rate are:
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The foot per second and the meter per second
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Angular rate is expressed in:
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Radians per second or revolutions per minute
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A ______ is used to measure angular rate.
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Stroboscope
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________ is the rate at which speed increases or decreases.
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Acceleration
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Slowing down is a:
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Negative acceleration
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What are the units of fluid?
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Gallons/minute and cubic feet/ second and cubic meters per second
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Viscosity is the quality of a substance related to its:
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Thickness
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One milliampere is = to?
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1/1000 amps
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One microampere is = to?
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1 * 10^-6 amps
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Heat flow rate is symbolized by?
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Qh
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Resistance=
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A force like quanity divided by a rate
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Two forms of resistance in mechanical systems are:
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Friction and drag
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Friction=
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Force times coefficient of friction.
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Drag resistance results from:
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The disruption of airflow as an object moves
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Sliding friction must be overcome to start an object in ____.
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Motion
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____ _____ must be overcome to keep a moving object in motion.
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Kinetic friction
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Static friction is ____ _____ than kinetic fricition.
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always greater
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Friction can be reducared by the addtion of:
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Lubricants
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Laminar flow is the opposite of:
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Turbulent flow
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Fluid resistance:
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Rf=Dp/Qv
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Re stands for:
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Electrical resistance
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