Question

what is a groin vault?
a. a groin vault is a structure that resembles the top half of a sphere.
b. a groin vault comes from the extension of a round arch, similar to a long tube of arches.
c. a groin vault has two barrel vaults of the same diameter which cross or intersect one another.
d. a groin vault has two barrels which extrude into a two dimensional structure.
please select the best answer from the choices provided
a
b
c
d

Explanation:

To determine the correct answer, we analyze each option:

• Option A: Describes a dome (half - sphere structure), not a groin vault.
• Option B: Describes a barrel vault (extension of a round arch like a tube of arches), not a groin vault.
• Option C: A groin vault is formed by the intersection of two barrel vaults of the same diameter, which matches the definition.
• Option D: The description of "extrude into a two - dimensional structure" is incorrect for a groin vault.

Answer:

C. A groin vault has two barrel vaults of the same diameter which cross or intersect one another.