1.
The first voussoir resting on the impost of an arch.
Correct Answer
C. Springer
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.
2.
The uppermost part of an abutment , often in the form of a block, capital, or molding from which an arch springs.
Correct Answer
D. Impost
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.
3.
The decorative molding or band on the face of an arch following the curved of the intrados.
Correct Answer
B. Archivolt
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.
4.
The temporary framework for supporting a masonry arch or vault during construction until the work can support itself.
Correct Answer
A. Centering
5.
The wedge shaped often embellished voussoir at the crown of an arch serving to lock the other voussoirs in place.
Correct Answer
B. Keystone
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.
6.
The extent of space between two supports of a structure. Also the structure so supported.
Correct Answer
B. Span
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.
Correct Answer
C. Effective Span
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.
Correct Answer
D. Deflection
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.
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.
Correct Answer
C. Bending Moment
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.
10.
A slight convex curvature intentionaly built into a beam, girder, or truss to compensate fro an anticipated deflection.
Correct Answer
D. Camber
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.