OSHA OSHA - Safety Certificate Machine Guarding Requirements Questions and Answers 3 — Questions and Answers
Question 1: What must an employer do if a fixed guard cannot be used to protect workers from a machine's point of operation?
- Shut down the machine permanently
- Post a warning sign and continue operations
- Use an alternative safeguarding device such as a light curtain or pressure-sensitive mat (Correct answer)
- Assign only senior employees to operate the machine
Correct answer: Use an alternative safeguarding device such as a light curtain or pressure-sensitive mat
When fixed guards are not feasible, OSHA requires employers to use alternative safeguarding devices like light curtains, pressure mats, or other presence-sensing technology.
Question 2: Which of the following machine components typically requires guarding under OSHA standards?
- The machine's electrical cord
- Rotating shafts, gears, and pulleys (Correct answer)
- The machine's power switch
- The instruction manual holder
Correct answer: Rotating shafts, gears, and pulleys
OSHA requires guarding on rotating shafts, gears, pulleys, and other moving power transmission components that could cause injury.
Question 3: What is the maximum permissible opening size for a guard located less than 4 inches from the danger zone, per OSHA Table O-10?
- 1/4 inch
- 1/2 inch (Correct answer)
- 3/4 inch
- 1 inch
Correct answer: 1/2 inch
OSHA Table O-10 specifies that when a guard opening is less than 4 inches from the hazard, the maximum opening size is 1/2 inch to prevent fingers from reaching the danger zone.
Question 4: An interlocked guard provides protection by doing which of the following?
- Sounding an alarm when the machine is turned on
- Automatically shutting off the machine or preventing startup when the guard is open or removed (Correct answer)
- Requiring two workers to operate the machine simultaneously
- Locking the workplace door during machine operation
Correct answer: Automatically shutting off the machine or preventing startup when the guard is open or removed
Interlocked guards are connected to the machine's control system so that the machine cannot operate unless the guard is properly closed and in place.
Question 5: Which of the following is an example of a hazard that machine guarding is designed to protect against?
- Slippery floors near the machine
- Flying chips and sparks from the point of operation (Correct answer)
- Improper lighting in the work area
- Noise levels above 85 decibels
Correct answer: Flying chips and sparks from the point of operation
Machine guarding protects workers from hazards at the point of operation, including flying chips, sparks, and debris generated during the machining process.
Question 6: Who is responsible for ensuring that machine guards are properly maintained and functional under OSHA regulations?
- Only the machine operator
- The equipment manufacturer
- The employer (Correct answer)
- OSHA inspectors
Correct answer: The employer
Under OSHA regulations, the employer bears the responsibility for ensuring all machine guards are properly installed, maintained, and in working condition.
OSHA OSHA - Safety Certificate Machine Guarding Requirements Questions and Answers 3
What must an employer do if a fixed guard cannot be used to protect workers from a machine's point of operation?