Final answer:
A pilot with an inoperative aircraft radio should look for light signals from the tower, with a steady green light indicating clearance to land.
Step-by-step explanation:
If an aircraft's radio is inoperative, the pilot should expect that the tower will use light signals to communicate. The standard light signal for clearance to land is a steady green light. Pilots should familiarize themselves with these signal meanings, which are outlined in the Aeronautical Information Manual (AIM) and in the regulations. It is important for safety that the pilot maintains a visual lookout for such signals and understands how to operate when radio communication is not available.