Mechanical Engineering Exam 1 UPDATED
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Machine - CORRECT ANSWER -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 ANSWER A small piece that makes up a larger whole. Each
component is there for a specific job, but the sum of components
System - CORRECT ANSWER A combination of components
Mechanical Engineering - CORRECT ANSWER -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 ANSWER -Describes a physical property of anything
-What we are measuring
Base Dimensions - CORRECT ANSWER -Are independent of other dimensions
-They are limited in number
-length, mass, time, temperature, force
Derived Dimension - CORRECT ANSWER -Derived from, or composed of, base dimensions
i.e. Area (length x width), Weight (mass x acceleration), velocity (length/time)
, System International (SI) - CORRECT ANSWER 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 ANSWER 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 ANSWER The magnitude of something in a particular direction
Mass - CORRECT ANSWER -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 ANSWER An indication of kinetic energy of mass at the molecular
level
Area - CORRECT ANSWER -A flat, two dimensional property
-Units of length multiplied by length describe area
-A=length x width
Volume - CORRECT ANSWER -Three-dimensional property measured in units of length times
length times length
-V=length x width x height
ACTUAL QUESTIONS AND CORRECT
ANSWERS
Machine - CORRECT ANSWER -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 ANSWER A small piece that makes up a larger whole. Each
component is there for a specific job, but the sum of components
System - CORRECT ANSWER A combination of components
Mechanical Engineering - CORRECT ANSWER -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 ANSWER -Describes a physical property of anything
-What we are measuring
Base Dimensions - CORRECT ANSWER -Are independent of other dimensions
-They are limited in number
-length, mass, time, temperature, force
Derived Dimension - CORRECT ANSWER -Derived from, or composed of, base dimensions
i.e. Area (length x width), Weight (mass x acceleration), velocity (length/time)
, System International (SI) - CORRECT ANSWER 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 ANSWER 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 ANSWER The magnitude of something in a particular direction
Mass - CORRECT ANSWER -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 ANSWER An indication of kinetic energy of mass at the molecular
level
Area - CORRECT ANSWER -A flat, two dimensional property
-Units of length multiplied by length describe area
-A=length x width
Volume - CORRECT ANSWER -Three-dimensional property measured in units of length times
length times length
-V=length x width x height
