Architecture Puzzler #348

Answer each question true or false:

A. To find the number of cubic inches in a ball, multiply the cube of the ball's diameter by 0.5236.

B. Doubling the diameter of a pipe increases its capacity four times.

C. To find the pressure in pounds per square inch of a column of water, multiply the height of the column in feet by 0.434.

D. A cubic foot of water contains 7.5 gallons, and 1,728 cubic inches, and weighs 62.5 pounds.

E. To find the diameter of a circle, multiply its circumference by 0.31831.

F. A side of a square multiplied by 1.4142 equals the diameter of the square's circumscribing circle.

We know that a conch is a type of shellfish. The term "conch" also describes an architectural form. What is this form?