Unit 8: Machine Guarding

Question 1

Why does Machine Guarding matter?

Answer 1

They cause thousands of serious injuries each year.

Question 2

Machine Guarding is_______________________.

Answer 2

The first line of defense against these hazards.

Question 3

What does OSHA require guarding on?

Answer 3

Any machine part, function, or process that can cause injury.

Question 4

What are the 3 dangerous motions of machinery?

Answer 4

Rotating, Reciprocating, and Transversing.

Question 5

What is the Rotating motion?

Answer 5

Rotating shafts, pulleys, belts, and couplings.

Question 6

What is the Reciprocating motion?

Answer 6

Back-and-forth motion of presses and saws.

Question 7

What is the Transversing motion?

Answer 7

the straight-line motion of a moving table or belt.

Question 8

What is a Point of Operation Hazard?

Answer 8

A spot where a machine cuts, bends, shapes, or drills a material.

Question 9

What are some Points of Operation Hazards?

Answer 9

Shears, presses, grinders, and saw blades.

Question 10

What are some other Hazard Types?

Answer 10

Ingoing nip points, flying objects, and crush/impact.

Question 11

What are some examples of Ingoing nip points?

Answer 11

Gears, rollers, and chains.

Question 12

What are some examples of Flying objects?

Answer 12

Sparks, chips, and debris.

Question 13

What are some examples of Crush/Impact Hazards?

Answer 13

Moving machine parts.

Question 14

What are OSHA’s 6 requirements for Guards?

Answer 14

1.) Prevents contact with dangerous parts.
2.) Is secure (Not easily removed or bypassed).
3.) Protects from falling objects.
4.) No new hazards (Sharp edges, Pinch points).
5.) No interference with work.
6.) Allows lubriction without removal.

Question 15

How many requirments does a guard have to meet to be effective?

Answer 15

All 6.

Question 16

What are the 4 Types of Guards?

Answer 16

1.) Fixed - Permanent barrier or part of a machine.
2.) Interlocked - Shuts machine off if the guard is open.
3.) Adjustable - Can be moved or adjusted by the operator.
4.) Self-Adjusting - Moves automatically as material passes.

Question 17

What are the 5 Safeguarding Devices?

Answer 17

1.) Presence-sensing devices - Light curtains, laser scanners, safety mats.
2.) Pullback Devices - Pulls operator’s hands away during cycle.
3.) Restraint devices - Holds operators hands outside the danger zone.
4.) Two-handed controls - Both hands must press to operate.
5.) Gates - Barrier moves into place while the machine cycles.

Question 18

What are the 3 other safety aids?

Answer 18

1.) Awareness barriers - Ropes, chains, and safety signs.
2.) Shields - Transparent barriers.
3.) Holding tools - Push sticks, clamps, and tongs.

Question 19

Employers must__________________.

Answer 19

Provide machine guarding, inspect/maintain guards, and train workers on safe use.

Question 20

Employees must________________.

Answer 20

Never remove, bypass, or disable guards, report missing/damaged guards, and use machines only as trained.

Question 21

Machine Guarding vs. Lockout/Tagout

Answer 21

Machine Guarding: Protects during normal operation.
Lockout/Tagout: Protects during maintenance, servicing, and cleaning.
(Both are required for full protection).

Question 22

What is the Max. Bench Grinder Tounge Guard gap?

Answer 22

1/4 inch.

Question 23

What is the Max. Bench Grinder Work Rest gap?

Answer 23

1/8 inch.