Final answer:
The correct answer is (c) In an area easily visible and reached, as safety equipment like shut off valves should be readily accessible and free from obstructions in case of an emergency. Proper placement ensures quick response and increased safety in the laboratory.
Step-by-step explanation:
The question pertains to the installation of safety equipment, specifically a shut off valve within a laboratory setting. The ideal location for a readily accessible shut off valve is option (c) In an area easily visible and reached. This criterion ensures that in the event of an emergency, the safety device can be accessed quickly and efficiently by laboratory personnel or emergency responders without delay or obstacles.
It is essential that safety equipment such as fire extinguishers and eyewash stations be located in areas that are not only accessible, but are also clearly marked and free from obstructions. Installing such safety devices in locked compartments, outside the building, or behind barriers would contravene the principles of safety and accessibility, potentially leading to delays in responding to emergencies and increasing the risk of harm.
Therefore, when making decisions about the installation and placement of safety equipment, consider the ease of access, visibility, and clear signage to ensure a safe working environment for all laboratory users.