ISC Lockout/Tagout & Machine Guarding

Question 1

What is the correct first step in the typical sequence for a lockout/tagout procedure on a machine that is running?

Accepted Answer

Notify affected employees, then shut the machine down by its normal stopping procedure

Answer

Affected employees must be notified, and the machine shut down normally before energy isolation, lock application, release of stored energy, and verification of isolation.

Question 2

Who is permitted to remove a lockout device after servicing is complete?

Accepted Answer

The authorized employee who applied it

Answer

Each authorized employee applies their own lock and is the only one who removes it, with narrow, documented exceptions when the employer follows a specific removal procedure.

Question 3

Which of the following is considered a form of stored (residual) energy that must be released or restrained during LOTO?

Accepted Answer

A compressed spring or a charged capacitor

Answer

Springs, capacitors, elevated loads, pressurized lines, and flywheels can all hold energy after power is isolated. That energy must be bled down, blocked, or grounded.

Question 4

Which category of machine guard prevents the operator from reaching the danger zone and is fixed to the machine so it cannot be removed without tools?

Accepted Answer

Fixed guard

Answer

A fixed guard is a permanent part of the machine and is held in place by fasteners that require tools to remove. It is the preferred safeguard when access to the point of operation is not needed.

Question 5

Under the lockout/tagout standard, when is a tagout-only system acceptable instead of lockout?

Accepted Answer

When the energy-isolating device is not capable of being locked out, and the tag gives equivalent protection

Answer

Tagout may be used if the device cannot be locked. The employer must then show that the tagout program gives full employee protection equivalent to lockout, with additional safety measures where needed.

ISC - Industrial Safety Certification Practice Test

ISC - Industrial Safety Certification Practice Test

ISC Lockout/Tagout & Machine Guarding