The placement of a Lockout device B/T an energy isolating device in accordance with an established procedure; ensuring that the energy isolating device and the equipment being controlled must not be operated until the lockout device is removed is called a:

The description details a process where a physical device (lockout device) is used to secure an energy source, preventing machinery from being operated during maintenance or servicing. This ensures the safety of workers by controlling hazardous energy.

• a) Strike: A strike is a collective refusal by employees to work, usually to protest working conditions or to enforce demands. This is unrelated to equipment safety procedures.
• b) Work stoppage: This is a general term for a temporary cessation of work, which could be due to various reasons, including safety, but it's not the specific procedure described.
• c) Lockout: This refers to the procedure of placing a lock on an energy isolating device to prevent the accidental or unauthorized energization of machinery or equipment. This perfectly matches the description given in the question.
• d) Tagout: Tagout is a warning procedure often used in conjunction with lockout. It involves placing a tag on an energy isolating device to indicate that the equipment must not be operated. While related, the question specifically mentions the "placement of a lockout device" and preventing operation until the "lockout device is removed," which defines the lockout procedure itself.

The definition provided directly corresponds to the safety procedure known as lockout.

The correct option is c).