WONDER #682: Why Are There Revolving Doors?

Question 1 of 3

What consists of three or four doors that are spaced an equal distance from each other around a center shaft and rotate in a circle inside of a cylinder?

  1. revolving doors
  2. elevators
  3. escalators
  4. turnstiles

Question 2 of 3

The door panels of revolving doors are often called what?

  1. wings
  2. leaves
  3. sheaves
  4. both (A) and (B)

Question 3 of 3

Which of the following is a benefit of revolving doors?

  1. heating and cooling costs are minimized
  2. street noise is reduced
  3. sound of slamming doors is eliminated
  4. all of the above

Check your answers online at https://www.wonderopolis.org/wonder/why-are-there-revolving-doors.