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WorksheetsUnit 2.3 Test Review
Total questions: 20
Worksheet time: 10mins
Mass and weight are the same physical quantity measured in different units.
True
False
Metals are generally good conductors of both heat and electricity.
False
True
Ceramics are typically ductile and bend easily without breaking.
False
True
Density can be determined using both experimental and mathematical methods.
True
False
Materials with a density less than water will sink in water.
True
False
Engineers must often make trade-offs when selecting materials.
False
True
Material Properties can be edited in CAD.
False
True
Which formula is used to calculate density?
D = m × V
D = m ÷ V
D = V − m
D = V ÷ m
Which of the following is not a class of engineering materials?
Polymers
Metals
Alloys
Ceramics
Which property best describes a material's resistance to being scratched?
Conductivity
Density
Hardness
Ductility
Which tool is most appropriate for measuring the volume of an irregularly shaped object?
Ruler
Dial caliper
Graduated cylinder (water displacement)
Balance
Which property is most useful when determining if a material can carry an electric current?
Thermal conductivity
Electrical conductivity
Density
Optical transmittance
Which statement best explains why density is useful for identifying materials?
Density changes with object size
Density only applies to metals
Density is easy to estimate visually
Density is unique for many materials
Which factor is least likely to influence material selection?
Safety
Manufacturability
Color preference only
Cost
Which property describes how a material reacts with oxygen or water over time?
Optical
Chemical
Magnetic
Mechanical
Which statement best distinguishes mass from weight for an object on different planets?
Weight measures volume and stays constant anywhere
Mass measures gravity and changes on other planets
Weight measures matter and stays constant everywhere
Mass measures matter and stays constant everywhere
A student measures the volume of an irregular rock by submerging it in a graduated cylinder and recording the water rise. Which is a realistic advantage of this method?
It measures mass directly without density
It only works if the object floats on water
It always gives exact volume with no error
It works well for irregular shapes without formulas
Which limitation most likely affects the water displacement method when measuring small objects?
The method cannot be used with any liquids
Objects always dissolve and lose their shape
Gravitational changes alter the object’s volume
Meniscus reading error can cause noticeable uncertainty
An engineer must choose a material for a drone frame that is strong, lightweight, and corrosion-resistant. Which initial material class is most appropriate?
Carbon steel for high density and low cost
Titanium alloys for high strength and low density
Lead alloys for high density and softness
Pure copper for excellent electrical conductivity
Which statement best connects atomic structure to macroscopic material properties?
Weaker bonds and defects always improve hardness
Random atomic motion always increases stiffness
Stronger bonds and ordered lattices can increase strength
Larger atoms always make a material weigh less
