Psad Flashcards
Mechanical property of a material that describes its ability to deform under tensile stress without fracturing, it is the opposite of brittleness which refers to a material tendency to fracture or break without significant deformation.
Ductility
typically quantified by the percentage of elongation of the reduction in processional area of a specimen when under goes tensile testing
Ductility
It is a mechanical property of a material and it refers to its ability to absorb energy without fracturing.
Toughness
It considers the materials resistance to fracture under various types of loading including impact of sudden loading
Toughness
It is quantified by measuring the area under the stress strain curve during a tensile test or by performing specific impact test such as the Charpy or izod test.
Toughness
Materials refers to a substance material that has uniform composition and properties throughout its structure in other words it has the same characteristic and properties of different within the material regardless of its location orientation.
Homogeneous
It is a mechanical property of a material that described its ability to absorb and store elastic energy when the form and then release that energy upon unloading.
Resilience
Refers tomaterials capacity to absorb impact or deformation and then recover its original shape and size when the applied load is removed
Resilience
Material condition that causes it to deform permanently even due to slight increases of stress
Yielding
Fracture cause when a material is subjected to repeated cycles of stress or strain
Fatigue
It is the initiation and propagation of rocks in a material due to cyclic loading
Fatigue
When the material is loaded over a long period it causes it to deform continuously until fracture
Creep
It is a fundamental mechanical property of a material that describes its ability to deform under applied stress and return to its original shape and size when the stress is removed.
Elasticity
It is a materials ability to undergo temporary deformation and then fully recovered its initial configuration once the external forces are released
Elasticity
Refers to the ability of a material to receive the formation and subjected to an applied load or force. It is a measure of materials rigidity or resistance to bending stretching and compressing
Stiffness
It is often quantified by the modulus of elasticity or young modulus
Stiffness
It represents the ratio of stress to strain within the elastic range of material
Youngs modulus
The ability of a material to undergo large permanent deformation in compression or property which enables a material to be beaten or rolled into thin sheets
Malleability
It is a material or substance that exhibit the same physical properties in all directions. In other words it’s mechanical,Thermal, Electrical and optical properties are uniform regardless of the direction in which they are measure
Isotropic
It is a material or a substance that exhibit with different physical properties or behaviors in different direction
Anisotropic
What is a mixture of cementitious material, aggregate, and water?
Concrete
What test measures the consistency of fresh concrete before it sets?
Concrete slump test
What test is used as an indicator of an improperly mixed batch?
Concrete slump test
What is the single most important factor governing the strength and durability of concrete?
Water to cement ratio (W/C ratio)
True or False
Strength of concrete depends upon the cement content
False, strength of concrete depends upon the W/C ratio rather than the cement content
What is the law that states that “higher the water/cement ratio, lower is the strength of concrete”?
Abram’s law
Which of the following comprises the bulk volume of concrete?
A. Aggregates
B. Admixture
C. Cement
D. Water
Aggregates
Which of the following tests determines the consistency of concrete?
A. Trial batch
B. Arbitrary proportion
C. Cylinder test
D. Slump test
Slump test
The most important factor in concrete mix
A. Fineless modulus
B. Water-cement ratio
C. Aggregate gradation
D. None of these
Water-cement ratio
A material condition that causes it to deform permanently even due to slight increase of stress
A. Plasticity
B. Yielding
C. Fatigue
D. Creep
Yielding
In materials science and engineering, what is the point on a stress-strain curve that indicates the limit of elastic behavior and the beginning of plastic behavior?
Yield point
What is a material property and is the stress corresponding to the yield point at which the material begins to deform plastically?
Yield strength or yield stress
What is used to determine the maximum allowable load in a mechanical component since it represents the upper limit to forces that can be applied without producing permanent deformation?
Yield strength
Fracture caused when a material is subjected to repeated cycles of stress or strain
A. Yielding
B. Creep
C. Plasticity
D. Fatigue
Fatigue
In materials science, what is the initiation and propagation of cracks in a material due to cyclic loading?
Fatigue
