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90 Cards in this Set
- Front
- Back
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force equals mass times:
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acceleration.
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a force is a:
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push or pull.
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voltmeters messure:
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voltage difference.
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multimeters measure:
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voltage,amperage,and resistance (in ohms).
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what is a form of energy characterized by the vibrating of atoms and molecules.
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heat.
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thermocouples use how many wires?
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3.
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thermocouples measure:
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temperature.
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thermocouples use how many different kinds of metals?
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2.
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autmopheric pressure is?
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14.7 psi.
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manometers are used to measure what?
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pressure differences.
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heat always moves from:
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cooler to warmers regions.
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i hydrometer measures:
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density or specific gravity in liquids.
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tw types of fluids are:
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hydrualic and pnuematic.
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puematic tools use:
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gas.
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hydraulic tools use:
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liquid.
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input work performed by an eletrical pump or motor is measured in what?
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joules.
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the basic unit of electrical is the:
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joule.
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electrical charge can be calculated by multiplying amperes by what?
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time.
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a coulomb is equal to what?
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6.25 times 10 to the 18th
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is there any such thing as linear or angular fluid work?
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no.
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what is the formula for fluid work?
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w=dp*v.
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spring scales are used to measure?
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input and output force?
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the basic english unit of work is the?
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foot-pound.
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one radian equals?
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57.3 degrees.
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the cross sectional area of a cylinder can be found by:
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multiplying .7854 by the diameter sqaured.
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imput work is?
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work going into the system.
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output work is the?
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work is done by the system.
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effiency is the output work devided by the pimput work times what?
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100.
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work equals what?
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firce times distance.
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in a closed fluid system the fluid is what?
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re-used.
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a rate is a displacement like quantity devide by:
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elapsed time.
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velocity is the measure of:
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linear machanical work.
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velocity is a what?
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vector.
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what is a vector?
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work accompanied by a direction.
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speed is similar to:
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velocity.
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speed is:
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scalar.
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what is a scalar?
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has no directional notation.
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units of linear machanical rate are:
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foot per second and meters per second.
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angular rate is exspressed in:
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radians per second or revelutions per mintue.
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there are how many radians in one revolution?
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6.28.
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one revolution is how many degrees?
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360.
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a stobophere measures?
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angular rate?
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acceleration is the rate at which speed:
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increases or decreases.
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units of acceleration are?
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foot/second sqaured andmeter/second sqaured.
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slowing down is somtimes refered to as:
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decelleration,
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slding friction must be overcome to:
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start an object in motion.
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static friction is always greater than what?
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kenetic friction.
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kenetic friction must be overcome to?
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keep an object in motion.
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what are materials such as copper and solder the permit the free flow of electrons?
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conductors.
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what are materails such as plastics and cermics that do not permit the free flow of electrons?
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insulators.
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laminar flow is the opposite of what?
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turbulant flow.
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the unit of resistance is the what?
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ohm.
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fluid resistance is proportional to the length of the?
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pipe.
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resistors are used to control the amount of what in a circut?
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voltage.
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friction can be reduced by the addition of what?
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lubricants.
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the coefficient of friction is the greek symbol:
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mew.
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the formula for drag resistance is?
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R=force devided by velocity.
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what is the disruptance of airflow as an object moves throught it?
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drag?
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what are the two forms of resistance in machanical systems?
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drag and friction.
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resistance generated by a solid moving through a liquid is known as:
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fluid resistance.
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energy is the abilty to what?
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do work.
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energy used to overcome resistance is lost in the form of what?
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heat.
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what is stored in machanical,fluid,or electrical device by the vitue of change in shape.
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potential energy.
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energy that an object has becuase it has been lifted against the gravatational pull of earth is what?
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gravatational potential energy.
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energy that an object has becuase of a temperary change in shape is?
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elastic potential enegy.
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kenetic energy is the energy of motion posessed by a:
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moving body.
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an inductor is used to?
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store electrcal energy.
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idunctance is measured in what?
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henries.
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electrical current flow is measured in what?
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amps.
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capasitane is measured in?
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farads.
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total energy in a system is equal to?
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the sum of the potential energy and kenetic energy.
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what is the transfer of energy by electromagnetic radiation?
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radiation.
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what is the tranfer of energy by moveent of a medium?
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convection.
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conduction is the movement of heat energy from wammer regions to:
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cooler regions.
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what are the two units of energy?
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calories and btu.
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power is the rate of?
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doing work.
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the formula for power is:
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P=work/time.
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the unifying equation for power (P=work/time) can also be exspressed as what:
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P=force times rate.
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power is measured in units of what?
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foot-pounds/seconds and watts.
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one watt is equal to what?
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one joule per second.
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one horepower is(english):
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550 foot-pounds per second.
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one horsepower is(SI):
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746 watts.
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the kilowatt-hour is a unit of what?
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energy.
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is the kilowatt-hour a unit of power?
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no.
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one watt equals one volt time one what?
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amp.
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in fluid systems, power equals what?
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pressure difference times flow rate.
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P=DP times Qv is the formuls for power in?
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fluid systems.
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in rotational mechanical systems, power equals?
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torque time angular rate.
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P=force time rate can also be exspressed as:
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P=work/time.
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746 watts is equal to 1?
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horsepower.
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