Which of the following checks should be conducted on the steering wheel?

The correct choice involves checking the steering play and smooth operation. This is essential for ensuring the steering system is functioning properly. A vehicle’s steering wheel should have minimal play or looseness, which indicates that the steering components are in good condition. If there is excessive play, it can suggest problems such as worn tie rod ends, steering gear issues, or other mechanical problems, which can lead to handling issues and unsafe driving conditions.

Smooth operation is also critical, as it ensures that the driver can maneuver the vehicle safely and accurately without unnecessary resistance or difficulty. A well-functioning steering system is necessary for precise control, especially in diverse driving conditions.

While other checks mentioned in the options may be relevant in some contexts, they do not directly pertain to the primary operational integrity of the steering system as fundamentally as the check for play and smooth operation does.