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WorksheetsES037A-K1 Prelim Exam
Total questions: 20
Worksheet time: 10mins
Thermoplastic materials are those materials which
are formed into shape under heat and pressure and results in a permanently hard product.
are used as a friction lining for clutches and brakes.
are flexible and can withstand considerable wear under suitable conditions.
do not become hard with the application of heat and pressure and no chemical change occurs.
The hardness is the property of a material due to which it
can be drawn into wires.
breaks with little permanent distortion.
can be rolled or hammered into thin sheets.
can cut another metal.
What are considered as the "building blocks" for engineering materials?
Compounds
Matters
Elements
Atoms
What types of materials behave like iron when placed in a magnetic field?
Crystals
Ferromagnetic materials
Amorphous materials
Metalloids
Polymer comes from Greek words "poly" which means "many" and "meros" which means
strength.
material,
part.
plastic.
What is a combination of two or more materials that has properties that the components materials do not have by themselves?
Compound
Mixture
Composite
Matrix
What physical property of a material that refers to the rate of heat flow per unit time in a homogenous material under steady-state conditions per unit are, per unit temperature gradient in a direction perpendicular to area?
Thermal expansion
Heat distortion temperature
Hot water absorption
Thermal conductivity
It refers to the amount of heat required to raise the temperature of any amount of a substance by 1 degree.
Latent heat
Heat capacity
Heat of fusion
Heat of fission
Which material combination demonstrates a strength-to-weight ratio suitable for helicopter X-wing structures while maintaining fatigue resistance?
Carbon-fiber-reinforced polymer
Nickel-based superalloys
Tungsten carbide-cobalt (WC-Co)
SiO2-Na2O-CaO glass
Which functional classification of materials would include shape-memory alloys responding to temperature changes in actuator systems?
Structural materials
Smart materials
Energy technology materials
Photonic materials
A material's environmental stress corrosion resistance is most critical for:
Window glass in arctic conditions
CPU heat sink assemblies
Photovoltaic cell encapsulation
Deep-sea oil pipeline joints
The three-dimensional network formation in thermosets directly causes:
Enhanced recyclability through remelting
Improved optical clarity in window applications
Increased dielectric constant for microelectronics
Irreversible shape fixation post-curing
The Venturestar X-33's cryogenic fuel tank design prioritizes materials with exceptional:
Thermoelectric figure of merit
UV radiation shielding capacity
Specific stiffness at -253°C
Superconducting transition temperature
In the functional classification framework, piezoelectric actuators belong to:
Smart materials
Structural materials
Energy technology materials
Photonic materials
What is the complete name of your instructor?
Engr. Hans Christian Fuentes
Engr. Hanz Christian Fuentes
Engr. Hens Christian Fuentes
Engr. Henz Christian Fuentes
1. During World War II, a class of welded merchant ships failed primarily because:
The tensile strength of the steel was too low
The fracture toughness of the steel and welds was insufficient
The modulus of the steel was inadequate
The fatigue strength of the steel was below requirements
The early Comet aircraft disasters were traced to:
Excessive creep deformation in turbine blades
Poor fracture toughness of aluminum alloys
Fatigue strength being lower than required due to window frame design
Oxidation of the fuselage under high-altitude conditions
3. Which property explains the excessive “give” in poorly designed plastic appliances?
Low fracture toughness
Low modulus
Low yield strength
Low hardness
Ceramics are distinguished from glasses in that:
Ceramics are crystalline and nonmetals, while glasses are amorphous
Ceramics are amorphous and glasses crystalline
Both are crystalline but differ in density
Ceramics are metallic, while glasses are nonmetallic
Which material would be unsuitable for a screwdriver shaft despite having high modulus, strength, and hardness?
Titanium alloy
Glass
Steel
Carbon fiber composite
