Which of the following is an appropriate action if a CRT is suspected to be damaged?

When dealing with a potentially damaged Cathode Ray Tube (CRT), inspecting it closely for cracks is an appropriate action because it allows you to assess the condition of the tube before taking further steps. Cracks in the glass envelope of a CRT can lead to a vacuum breach, which poses safety risks, including implosion hazards. A thorough inspection helps in determining whether the CRT is safe to handle or if it poses a danger due to potential glass shards or high voltage.

Conducting this inspection is a proactive measure that puts safety first by ensuring that any visible damage is identified and can be addressed properly, such as through safe disposal or professional handling. This approach prevents further risk to yourself or others by ensuring that you understand the potential dangers associated with the damaged CRT.

Other choices, such as turning it on for testing, could exacerbate any existing issues and lead to further damage or safety hazards. Disposing of it immediately may not provide the opportunity to properly assess and understand the extent of the damage. Leaving it unattended without inspection neglects the possibility of dangerous conditions developing that could pose risks to safety.