Lani Quiz No. 2

1. The decorative molding or band on the face of an arch following the curved of the intrados.

Spandel

Archivolt

Intrados

Extrados

An archivolt is a decorative molding or band that is found on the face of an arch. It follows the curved shape of the intrados, which is the inner curve of the arch. The archivolt adds visual interest and decoration to the arch, enhancing its overall aesthetic appeal. It is an important architectural element that can be found in various styles of arches, adding a touch of elegance and sophistication to the structure.

Explanation

An archivolt is a decorative molding or band that is found on the face of an arch. It follows the curved shape of the intrados, which is the inner curve of the arch. The archivolt adds visual interest and decoration to the arch, enhancing its overall aesthetic appeal. It is an important architectural element that can be found in various styles of arches, adding a touch of elegance and sophistication to the structure.

2. The wedge shaped often embellished voussoir at the crown of an arch serving to lock the other voussoirs in place.

Arch lock

Keystone

Top of arch

Haunch

The keystone is the wedge-shaped voussoir at the crown of an arch that locks the other voussoirs in place. It is often embellished and plays a crucial role in maintaining the stability and integrity of the arch structure.

Explanation

The keystone is the wedge-shaped voussoir at the crown of an arch that locks the other voussoirs in place. It is often embellished and plays a crucial role in maintaining the stability and integrity of the arch structure.

3. An external moment tending to cause part of a structure to rotate or bend, equal to the algebraic sum of the moments about the neutral axis of the section under consideration.

Moment stress

Bending shear

Bending Moment

Shearing moment

A bending moment refers to an external force that causes a part of a structure to rotate or bend. It is calculated by taking the algebraic sum of the moments about the neutral axis of the section being considered. This moment stress is responsible for the bending or deformation of the structure, and understanding it is crucial in designing and analyzing structures to ensure their stability and safety.

Explanation

A bending moment refers to an external force that causes a part of a structure to rotate or bend. It is calculated by taking the algebraic sum of the moments about the neutral axis of the section being considered. This moment stress is responsible for the bending or deformation of the structure, and understanding it is crucial in designing and analyzing structures to ensure their stability and safety.

4. The first voussoir resting on the impost of an arch.

Base of arch

Keystone

Springer

Archivolt

A springer is the first voussoir (wedge-shaped stone) that rests on the impost (supporting block) of an arch. It serves as the starting point for the arch and helps to distribute the weight of the structure. The other options listed are different parts of an arch, but they do not specifically refer to the first voussoir.

Explanation

A springer is the first voussoir (wedge-shaped stone) that rests on the impost (supporting block) of an arch. It serves as the starting point for the arch and helps to distribute the weight of the structure. The other options listed are different parts of an arch, but they do not specifically refer to the first voussoir.

5. The temporary framework for supporting a masonry arch or vault during construction until the work can support itself.

Centering

Scafolding

Shoring

Formwork

not-available-via-ai

Explanation

not-available-via-ai

6. The extent of space between two supports of a structure. Also the structure so supported.

Bay

Span

Clear Span

Effective Span

Span refers to the extent of space between two supports of a structure. It is also used to describe the structure itself that is supported by these two points.

Explanation

Span refers to the extent of space between two supports of a structure. It is also used to describe the structure itself that is supported by these two points.

7. The center to center distance between the supports of a span.

Clear Span

Bay

Effective Span

None of the above

The effective span refers to the center to center distance between the supports of a span. This measurement is important in determining the load-bearing capacity and stability of a structure. The clear span refers to the distance between the supports without any obstructions, while the bay refers to the space between two adjacent supports. Therefore, the effective span is the most appropriate term to describe the given description.

Explanation

The effective span refers to the center to center distance between the supports of a span. This measurement is important in determining the load-bearing capacity and stability of a structure. The clear span refers to the distance between the supports without any obstructions, while the bay refers to the space between two adjacent supports. Therefore, the effective span is the most appropriate term to describe the given description.

8. The perpendicular distance a spanning member deviates from a true course under transverse loading, increasing with load and span and decreasing with an increase in the moment of inertia of the section or the modulus of elasticity of the material.

Camber

Moment

Shear

Deflection

Deflection is the correct answer because it refers to the perpendicular distance a spanning member deviates from a true course under transverse loading. This deflection increases with load and span, but decreases with an increase in the moment of inertia of the section or the modulus of elasticity of the material.

Explanation

Deflection is the correct answer because it refers to the perpendicular distance a spanning member deviates from a true course under transverse loading. This deflection increases with load and span, but decreases with an increase in the moment of inertia of the section or the modulus of elasticity of the material.

9. A slight convex curvature intentionaly built into a beam, girder, or truss to compensate fro an anticipated deflection.

Deflection

Curvature

Arch of Beam

Camber

Camber refers to a slight convex curvature intentionally built into a beam, girder, or truss. This curvature is designed to compensate for an anticipated deflection. In other words, camber helps to counteract the natural tendency of the structure to sag or bend under load, ensuring that it remains straight and level when in use.

Explanation

Camber refers to a slight convex curvature intentionally built into a beam, girder, or truss. This curvature is designed to compensate for an anticipated deflection. In other words, camber helps to counteract the natural tendency of the structure to sag or bend under load, ensuring that it remains straight and level when in use.

10. The uppermost part of an abutment , often in the form of a block, capital, or molding from which an arch springs.

Impost

Pendentive

Extrados

Impost

The correct answer is "Impost". An impost is the uppermost part of an abutment, often in the form of a block, capital, or molding from which an arch springs. It provides support and distributes the weight of the arch. The other options, pendentive and extrados, are not related to the uppermost part of an abutment.

Explanation

The correct answer is "Impost". An impost is the uppermost part of an abutment, often in the form of a block, capital, or molding from which an arch springs. It provides support and distributes the weight of the arch. The other options, pendentive and extrados, are not related to the uppermost part of an abutment.