Mechanical Engineering Exam 1
Questions Answered Correctly (Qs)
2026 update
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
Questions Answered Correctly (Qs)
2026 update
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
