How do you know that the levers, pedals and switches are in good condition and operate properly?

• They should spring back to the original position when you let go.
  Explanation:

  "Make sure all levers, pedals and switches are in good condition and operate properly. They should spring back to the original position when you let go."
• They should not spring back to the original position when you let go.
• They should spring back to the original position when you press them.
• They should not move when you press them