Construction and Building Materials Multiple Choice Questions & Answers (MCQs) on “Arches Technical Terms”.
1. An ___________ is a structure which is constructed to span across an opening.
a) Doors
b) Windows
c) Arches
d) Bridges
Answer: c
Clarification: Arches generally consist of small wedge shaped unit which are joined together with mortar. However, the arches made of steel and RCC are built in single units without the use of wedge shaped unit and they are used for the bridge construction.
2. __________ is the inner surface of Arch.
a) Intrados
b) Soffit
c) Crown
d) Haunch
Answer: b
Clarification: Soffit is the inner surface of the arch. Sometimes the terms, extrados and Soffit are treated as synonymous. Whereas, Intrados is the inner curve of the arch.
3. __________ is the inclined or splayed surface on the abatement.
a) Skewback
b) Springer
c) Back
d) Piers
Answer: a
Clarification: Skewback is prepared to receive the arch and from it, springs the arch. Whereas, Back is the external curve of an Arch.
4. ____________ is the first voussoir and springing level on the other side of an arch and it is immediately adjacent to the skewback.
a) Key
b) Crown
c) Abutment
d) Springer
Answer: d
Clarification: Voussoirs are the wedge shaped unit forming the courses of an arch. Whereas, Abutment is the end support of an arch.
5. ___________ is the wedge shaped unit at the Crown of an arch.
a) Key
b) Crown
c) Ring
d) Haunch
Answer: a
Clarification: Key is sometimes made prominent by making out of a larger section and projecting it below and above the outlines of an arch.
6. ____________ is the clear vertical distance between the highest point on the intrados and springing line.
a) Span
b) Rise
c) Arcade
d) Center
Answer: b
Clarification: Whereas, Span is the clear horizontal distance between the supports. And Centre is the geometrical centre of the curve of an arch.
7. ____________ is the lower half portion of the arch between the crown and the skewback.
a) Spandril
b) Soffit
c) Haunch
d) Ring
Answer: c
Clarification: Whereas, Spandril is the irregular triangular space formed between the extrados and the horizontal line drawn tangent to the crown.
8. The horizontal distance measured perpendicular to the front and back faces of an arch is known as the _________
a) Piers
b) Ring
c) Crown
d) Thickness
Answer: d
Clarification: Whereas, Ring is the circular course forming an arch. And Piers are the intermediate supports of an Arcade.
9. ____________ is a row of arches supporting a wall above and being supported by the piers.
a) Soffit
b) Arcade
c) Crown
d) Impost
Answer: b
Clarification: Whereas, Crown is the highest point of the extrados. The Springing line is the imaginary horizontal line joining the two springing points.
10. The projecting course at the upper part of a Pier or an abutment to stress the springing line is called as the ___________
a) Impost
b) Height
c) Springing Point
d) Crown