CE PSAD Past Board Exam Objective Type Questions
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43 Terms
Orthotropic Material
The material composition is the same, but its mechanical properties are different in every direction.
Elasticity
Refers to the tendency of solid materials to return to their original shape after forces are applied on them. When the forces are removed, the object will return to its initial shape and size.
Yielding
Refer to the stress at which a material begins to deform plastically
Toughness
The ability of the material to absorb energy in the plastic range.
Resilience
The ability of the material to absorb energy in the elastic range.
Ductility
The term refers to the ability of a material to deform in the plastic range without breaking.
Center of rigidity
It is the point through which the resultant of the resistance to the applied lateral force acts.
Center of mass
The point on a structure where the resultant vertical force acts.
Eccentricity
The distance between the center of mass and center of rigidity.
Ground displacement
Which of the following can be measured by seismometer?
Inverse of stiffness
Which of the following refers to the flexibility of a structural system?
Yielding
The stress point where a material will have appreciable deform when small amount of stress is experienced.
Toughness
The ability of the material to deform in plastic range without breaking.
Elastic limit
The greatest stress that can be applied to an elastic body without causing permanent deformation.
Torsional shear stress
What will develop if the center of mass and center of rigidity of a structure does not coincide?
Soft storey
A building which has a floor which is less than 70% as stiff as the floor immediately above it, or less than 80% as stiff as the average stiffness of the three floors above it.
Storey drift
Refers to the lateral displacement of one level relative to the other level above or below.
Reciprocal of deflection
Which of the following best refers to the rigidity of a structure.
Sudden drop of shear strength
Which of the following best describes liquefaction?
k = k1 + k2
If two springs with stiffness and are arranged in parallel, which of the following gives the combined stiffness ?
Center of rigidity
The point through which the resultant of the resistance to the applied lateral force acts.
Center of mass
The point on a structure through which the applied seismic force acts.
Reciprocal of stiffness
Refers to the flexibility of a structure.
Isotropic
A property of a material which has the same composition at every point, but the elastic property may not be the same in all directions.
Homogeneous
A property of a material that has the same elastic properties in all directions.
Orthotropic
A property of a material in which the composition material exhibits elastic properties in one direction different from that in perpendicular direction.
Focal depth
Which of the following describes the location of an earthquake besides epicenter.
Components of ground motion
Seismometer measures?
Magnitude
A Richter Scale measures _________ of an earthquake.
Aggregates
Which of the following comprises the bulk volume of concrete?
Slump test
Which of the following tests determines the consistency of concrete?
Water-cement ratio
The most important factor in concrete mix.
Yielding
A material condition that causes it to deform permanently even due to slight increase of stress.
Fatigue
Fracture caused when a material is subjected to repeated cycles of stress or strain.
Creep
When a material is loaded over a long period, it causes it to deform continuously until fracture.
Storey drift
Refers to the lateral displacement of one level relative to the level above or below.
Torsional shear stress
Occurs when the structure's center of mass does not coincide with its center of rigidity.
Yielding
A material condition that causes it to deform permanently even due to slight increase in stress.
Fatigue
Fracture caused when a material is subjected to repeated cycles of stress or strain.
Creep
When a material is loaded over a long period, it causes it to deform continuously until fracture.
Rupture strength
The stress at failure
Ultimate strength
The highest ordinate in a stress-strain diagram.
Yield strength
The material will have an appreciable elongation or yielding without corresponding increase in load.