Machine Guarding
62 flashcards covering Machine Guarding for the OSHA OSHA 10/30 General Industry section.
Machine guarding focuses on protecting workers from hazards associated with machinery, such as rotating parts, flying debris, or electrical risks, by using barriers, interlocks, and other safety devices. This topic is defined by OSHA regulations under 29 CFR 1910.212 for general industry, which outlines requirements for guarding points of operation, belts, and pulleys to prevent amputations and other injuries in construction and general workplaces.
On OSHA 10/30 certification exams, machine guarding typically appears in multiple-choice questions that describe workplace scenarios and ask about proper guard installation, inspection, or removal procedures. Common traps include overlooking the need for guards on all hazardous areas or assuming a machine is safe if it's running slowly, which can lead to underestimating risks.
Always verify that guards are securely in place before operating equipment to avoid common oversights in daily routines.
Terms (62)
- 01
What must employers do to protect employees from machine hazards?
Employers must provide guards to prevent employee contact with moving parts and other hazards, as required for all machines (29 CFR 1910.212).
- 02
Under 29 CFR 1910.212, what is required for the point of operation on machines?
The point of operation must be guarded to prevent entry of hands or fingers by using barriers, gates, or other means that prevent hazards (29 CFR 1910.212(a)(1)).
- 03
How are rotating parts on machinery protected?
Rotating parts must be guarded to prevent accidental contact, such as by enclosing them or using barriers (29 CFR 1910.212(a)(3)).
- 04
What type of guard is needed for belt and pulley systems?
Belt and pulley systems must have guards that enclose the points of contact and prevent access, ensuring they are securely fastened (29 CFR 1910.219).
- 05
When using abrasive wheel machinery, what guarding is mandatory?
Abrasive wheels must have guards that cover the spindle end, nut, and flange projections, protecting against flying fragments (29 CFR 1910.215).
- 06
What is required for safeguarding mechanical power presses?
Mechanical power presses require point-of-operation guards, such as presence-sensing devices or gates, to prevent operator injury (29 CFR 1910.217).
- 07
Under 29 CFR 1910.219, how must flywheels be guarded?
Flywheels must be fully enclosed or guarded by a band guard where exposed to contact, preventing accidental engagement (29 CFR 1910.219(b)).
- 08
What guards are needed for gears, sprockets, and chains?
Gears, sprockets, and chains must be fully enclosed or guarded to prevent access to nip points and moving parts (29 CFR 1910.219).
- 09
For woodworking machinery, what guarding is specified?
Woodworking machinery must have guards on cutting heads, blades, and other hazardous parts to prevent contact during operation (29 CFR 1910.213).
- 10
How must employers ensure machine guards remain effective?
Machine guards must be securely fastened and not easily removed or rendered ineffective, maintaining protection against hazards (29 CFR 1910.212(a)(2)).
- 11
What is the purpose of machine guarding in general industry?
Machine guarding prevents employee injury from hazards like rotating parts, flying chips, and in-running nip points by using barriers or devices (29 CFR 1910.212).
- 12
Under 29 CFR 1910.215, what must be done with abrasive wheel flanges?
Abrasive wheel flanges must be maintained in good condition and properly sized to secure the wheel and prevent breakage (29 CFR 1910.215(b)).
- 13
What procedural step is needed before removing a machine guard?
Before removing a machine guard, the machine must be shut down and locked out to control hazardous energy, preventing accidental startup (29 CFR 1910.147).
- 14
How often should machine guards be checked for proper function?
Machine guards should be inspected regularly as part of the general duty to maintain safe equipment, though specific frequency is not detailed; ensure they are in place before use (29 CFR 1910.212).
- 15
In a scenario where a guard is damaged, what action is required?
The machine must be shut down immediately, and the guard repaired or replaced before restarting to prevent exposure to hazards (29 CFR 1910.212).
- 16
What is required when operating a power press without a guard?
Operation is prohibited; point-of-operation guarding must be in place to protect the operator from crushing hazards (29 CFR 1910.217).
- 17
Under 29 CFR 1910.213, how must circular saws be guarded?
Circular saws must have hood guards that cover the unused portion of the blade and automatically return to position (29 CFR 1910.213(a)(1)).
- 18
What guards are necessary for shafting in power transmission?
Shafting must be guarded with enclosures or covers to prevent contact with rotating surfaces (29 CFR 1910.219).
- 19
What defines an adequate machine guard?
An adequate machine guard must be strong enough to resist normal forces, not create new hazards, and allow safe operation when in place (29 CFR 1910.212).
- 20
For mills and calenders, what guarding is mandated?
Mills and calenders must have guards on rolls and nip points to prevent hands from entering dangerous areas (29 CFR 1910.216).
- 21
What must workers do if they notice a guard is missing?
Workers must report the missing guard to their supervisor and not operate the machine until it is replaced, avoiding exposure to hazards (29 CFR 1910.212).
- 22
Under 29 CFR 1910.217, what safety devices are used on power presses?
Safety devices like pull guards, restraint devices, or presence-sensing devices must be used to prevent point-of-operation injuries (29 CFR 1910.217(c)).
- 23
How must employers train workers on machine guarding?
Employers must provide training on recognizing and avoiding machine hazards, including proper use of guards, as part of general safety requirements (29 CFR 1910.212).
- 24
In a scenario with a jammed machine, what should the operator do?
The operator should shut down and lock out the machine before clearing the jam to prevent unexpected startup and injury (29 CFR 1910.147).
- 25
What is the first step in installing a new machine guard?
The first step is to ensure the machine is de-energized and locked out, then verify the guard fits the specific hazard (29 CFR 1910.147 and 1910.212).
- 26
What guarding is required for forging machines?
Forging machines must have guards on dies, hammers, and presses to protect against impact and crushing hazards (29 CFR 1910.218).
- 27
Under 29 CFR 1910.219, how are couplings guarded?
Couplings must be guarded to prevent access to rotating or moving parts that could cause entanglement (29 CFR 1910.219(d)).
- 28
What procedural requirements apply to adjusting machine guards?
Adjusting guards requires the machine to be locked out first, ensuring no energy is present during the process (29 CFR 1910.147).
- 29
In a workplace with multiple machines, what guarding standard applies?
Each machine must have specific guards based on its hazards, as outlined in the relevant subparts of 29 CFR 1910 (29 CFR 1910.212).
- 30
What must be done if a guard interferes with machine operation?
The guard must be adjusted or replaced to maintain safety without compromising function, ensuring compliance with standards (29 CFR 1910.212).
- 31
How are belt drives safeguarded?
Belt drives must be enclosed or guarded at points of contact to prevent slipping or entanglement hazards (29 CFR 1910.219).
- 32
Under 29 CFR 1910.215, what conditions must abrasive wheels meet?
Abrasive wheels must be mounted with proper flanges and guards to contain potential breakage and protect operators (29 CFR 1910.215).
- 33
What is a common hazard that machine guards address?
Machine guards address hazards like shearing, crushing, and cutting from moving parts, preventing employee contact (29 CFR 1910.212).
- 34
In a scenario where an employee is injured by unguarded machinery, what follows?
The employer must investigate, correct the guarding issue, and ensure future compliance to prevent recurrence (29 CFR 1910.212).
- 35
What guarding is specified for horizontal boring machines?
Horizontal boring machines must have guards on spindles and cutting tools to prevent access to rotating parts (29 CFR 1910.213).
- 36
How must machine operators be protected from flying debris?
Operators must be protected by guards that enclose hazardous areas, such as on abrasive wheels or saws (29 CFR 1910.215 and 1910.213).
- 37
Under 29 CFR 1910.217, what certification is needed for power presses?
Power presses must have periodic inspections and certification by a qualified person to ensure safe operation (29 CFR 1910.217(e)).
- 38
What procedural check is required before starting a guarded machine?
Verify that all guards are in place and secure before starting, to ensure protection against hazards (29 CFR 1910.212).
- 39
In a factory setting, how are conveyor belts guarded?
Conveyor belts must have guards on nip points and moving parts to prevent pinching or drawing in of body parts (29 CFR 1910.219).
- 40
What defines a point of operation in machine guarding?
The point of operation is where work is performed, such as cutting or shaping, and must be guarded against access (29 CFR 1910.212(a)(1)).
- 41
Under 29 CFR 1910.218, how are press brakes guarded?
Press brakes must have guards or devices to prevent hands from entering the point of operation during the stroke (29 CFR 1910.218).
- 42
What must employers provide for workers near unguarded machines?
Employers must provide training and ensure guards are installed to protect workers from nearby hazards (29 CFR 1910.212).
- 43
In a scenario with a faulty guard on a lathe, what action is needed?
Shut down the lathe, lock it out, and repair or replace the guard before resuming use (29 CFR 1910.147 and 1910.212).
- 44
How are overhead belts and ropes guarded?
Overhead belts and ropes must be guarded to prevent falling objects or contact from below (29 CFR 1910.219).
- 45
What is required for the maintenance of machine guards?
Machine guards must be maintained in good condition and inspected regularly as part of safe work practices (29 CFR 1910.212).
- 46
Under 29 CFR 1910.213, what guards are needed for jointers?
Jointers must have guards on knives and feed rolls to prevent contact during operation (29 CFR 1910.213(j)).
- 47
What procedural steps involve lockout/tagout and machine guarding?
Lockout/tagout must be used when servicing or maintaining machines with guards, to control energy sources (29 CFR 1910.147).
- 48
In a training session, what machine guarding topics must be covered?
Topics must include hazards of unguarded machines and proper use of guards, as per OSHA requirements (29 CFR 1910.212).
- 49
How must vertical belts be protected?
Vertical belts must be guarded at the bottom to prevent access and at the top if within reach (29 CFR 1910.219).
- 50
What guarding is essential for reciprocating parts?
Reciprocating parts must be guarded to prevent contact with moving elements that could cause injury (29 CFR 1910.212).
- 51
Under 29 CFR 1910.216, how are rubber mills guarded?
Rubber mills must have guards on rolls and emergency stopping devices to prevent nip point injuries (29 CFR 1910.216).
- 52
What is the employer’s responsibility for machine safety?
Employers must furnish and ensure the use of guards on machines to protect employees from recognized hazards (29 CFR 1910.212).
- 53
In a scenario where a guard is bypassed, what should happen?
The machine must be stopped, the bypass corrected, and workers retrained on safety procedures (29 CFR 1910.212).
- 54
How are hand-fed machines safeguarded?
Hand-fed machines must have guards on the point of operation to protect the operator's hands (29 CFR 1910.212).
- 55
What additional guarding is needed for high-speed machinery?
High-speed machinery requires guards that can withstand the forces and contain debris, as per machine-specific standards (29 CFR 1910.215).
- 56
Under 29 CFR 1910.219, what guards are used for pulleys?
Pulleys must be guarded to enclose the rim and prevent contact with the belt or rope (29 CFR 1910.219(c)).
- 57
What procedural training is needed for machine operators?
Operators must be trained on guard installation, removal, and hazards to ensure safe operation (29 CFR 1910.212).
- 58
In a maintenance scenario, how are guards handled?
Guards must be removed only after lockout, and reinstalled before restarting the machine (29 CFR 1910.147).
- 59
What is the key requirement for all machine guards?
All machine guards must prevent access to hazards while allowing safe operation of the machine (29 CFR 1910.212).
- 60
How must employers address machine guarding in hazard assessments?
Employers must identify and guard against machine hazards during workplace assessments (29 CFR 1910.212).
- 61
Under 29 CFR 1910.213, what guards are required for planers?
Planers must have guards on cutter heads and feed mechanisms to protect against cutting hazards (29 CFR 1910.213).
- 62
What action is needed if a guard becomes loose during operation?
Stop the machine, secure the guard, and inspect for damage before continuing (29 CFR 1910.212).