Mechanical Engineering Exam 1 || with 100% Errorless Solutions.
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Course
Mechanical Engineering
Institution
Mechanical Engineering
Machine correct answers -A device that uses energy to do work to accomplish some desired activity
-They do not produce energy, but they do transmit and transform energy
-Machines can transmit a force, control its motion, and change its direction
-A machine is a system of components
Component ...
Mechanical Engineering Exam 1 || with 100% Errorless
Solutions.
Machine correct answers -A device that uses energy to do work to accomplish some desired
activity
-They do not produce energy, but they do transmit and transform energy
-Machines can transmit a force, control its motion, and change its direction
-A machine is a system of components
Component correct answers A small piece that makes up a larger whole. Each component is
there for a specific job, but the sum of components
System correct answers A combination of components
Mechanical Engineering correct answers -The designing of machines that contribute to society
and our quality of life
-Mechanical engineers apply the principles of mathematics, chemistry, and physics to solve real-
world problems
Dimension correct answers -Describes a physical property of anything
-What we are measuring
Base Dimensions correct answers -Are independent of other dimensions
-They are limited in number
-length, mass, time, temperature, force
Derived Dimension correct answers -Derived from, or composed of, base dimensions
i.e. Area (length x width), Weight (mass x acceleration), velocity (length/time)
System International (SI) correct answers The standard system of units that uses base 10 and
used in the rest of the world.
-US does not use, but Great Britain does
-Base Units: mass-kilograms (kg), length-meters (m), and time-Seconds (S)
-Force is a derived unit measured in newtons (N)
US Customary correct answers A system adopted from an old British system of units in the 13th
century
-Engineering system
-Units: length-foot (ft), time-second (s), force-(lbs)
-Mass is a derived unit called a slug
-Political/Economic choice
-Awkward
Length correct answers The magnitude of something in a particular direction
, Mass correct answers -The amount of atoms and molecules in something
-Matter is energy that has become solid
-An object gains mass when it gains more energy and vice a versa
-Units: SI-kgs and USA: Slugs, lbs
Temperature correct answers An indication of kinetic energy of mass at the molecular level
Area correct answers -A flat, two dimensional property
-Units of length multiplied by length describe area
-A=length x width
Volume correct answers -Three-dimensional property measured in units of length times length
times length
-V=length x width x height
Units for Pressure correct answers -psi
-newtons
-pascals
Metrology correct answers The branch of science and engineering involving measurement
Engineers and scientists need a common language correct answers Dimensions and units
Dimensions are measured by units correct answers ...
Units correct answers Used to measure or quantify
-US Common: Absolute and Gravitational
-SI: absolute
Conversions correct answers -Allows comparison between different measuring systems and units
-Necessary to market internationally
Effort correct answers -The force simple machines use to do work on a single load or against a
single force
-When a simple machine increases a force it is at the expense of a decrease in the distance the
load is moved
-When the work done by the effort just equals the work done by the load, no movement of the
machine will occur
-When the work done by the effort exceeds the work done by the load, the load will move
Mechanical Advantage correct answers -If the force needed to operate the machine (input force)
is less than the force being opposed or the load being moved (output force)
-The ratio of the output force divided by the input force
-If the number is greater than one, there is a mechanical advantage equal to that number
Inclined Plane correct answers -A flat, sloping surface
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