Machine Guarding Requirements Flashcards

Under OSHA 1910.212, at what point on a machine must a guard prevent the operator from having any part of the body in the danger zone?

Answer: At the point of operation

OSHA requires guarding at the point of operation where work is actually performed on the material.

A worker asks whether a guard can be removed briefly to clear a jam while the machine is running. What is the correct action?

Answer: Shut down and lock out the machine first

Machines must be shut down and locked out before removing guards or clearing jams.

Which type of hazard is created by gears, rollers, or belt-and-pulley combinations moving toward each other?

Answer: In-running nip point

Rotating parts moving toward each other create in-running nip points that can catch clothing or body parts.

What is the primary purpose of an anti-restart (magnetic) motor control after a power loss?

Answer: To prevent the machine from restarting automatically when power returns

Anti-restart controls prevent unexpected startup that could injure a worker when power is restored.

A guard on a table saw is designed so material can pass through but a finger cannot reach the blade. This illustrates which guarding principle?

Answer: Maximum opening safe distance

Guard openings must be sized so a finger or hand cannot reach the danger zone.

Which safeguarding device stops the machine if the operator's hands enter the danger zone during the cycle?

Answer: Presence-sensing device

Presence-sensing devices like light curtains stop the machine when they detect a body part in the danger zone.

Who is responsible for ensuring machine guards are in place and functioning before operation?

Answer: The employer

The employer is responsible for providing and maintaining effective machine guarding.