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Occupational Safety and Health

Industrial Manufacturing - Machinery and Electronics · 製造分野 · Written by Tokutei Pass based on the official study texts; not copied verbatim.

Pre-Work Safety Checks (Point-and-Call, KY, Near-Misses)

Point-and-call (Shisa koshou) before work involves pointing at the target and calling out aloud to prevent human error.

Discussing potential hazards with coworkers before starting work to decide on countermeasures is called Hazard Prediction (KY) activity.

An incident that nearly caused an injury or accident is called a near-miss (Hiyari-hatto).

Never keep near-misses only in personal notes; always report and share them with supervisors and the workplace to prevent serious accidents.

Key points


  • (○ True) Point-and-call prevents mistakes by pointing at the target with your finger and calling out aloud to confirm.

  • (○ True) Discussing potential hazards together before starting work is called Hazard Prediction Activity (KY activity).

  • (× False) Keeping a near-miss (Hiyari-hatto) in personal notes without reporting it is FALSE (always report it to prevent recurrence).
WordMeaning
point-and-call confirmation
hazard prediction activity (KY)
near-miss incident (Hiyari-hatto)
recurrence prevention
safety confirmation

Personal Protective Equipment and Rotating Machinery Safety

When drilling with a bench drill press, never wear gloves to avoid entanglement, and clamp the workpiece securely in a vise.

Wear impact-resistant safety glasses against flying chips, a dust mask against grinding dust, and earplugs or earmuffs in high-noise areas.

Safety covers on rotating parts such as belts and gears must never be removed while the machine is running.

Always stop the machine completely before performing inspection, lubrication, or cleaning.

Personal Protective Equipment and Rotating Machinery Safety

Key points


  • (○ True) When operating a drill press, do not wear gloves and clamp the workpiece securely with a vise.

  • (× False) Wearing everyday sunglasses instead of impact-resistant safety glasses, or only earplugs instead of a dust mask during grinding, is FALSE.

  • (× False) Temporarily removing a safety cover on rotating parts while the machine is running for inspection or oiling is FALSE.
WordMeaning
bench drill press
vise
safety glasses
dust mask
safety cover (guard)

Electrical & Pneumatic Maintenance and Lockout/Tagout

Before repairing electrical equipment, shut off the power, prevent re-energizing with locks and tags, and verify zero voltage and residual energy release.

Attach a lock (Lockout) and a 'Do Not Operate' tag (Tagout) to the switch so others cannot accidentally turn the power back on.

A 'Do Not Operate' tag must never be removed or ignored by anyone else without confirmation from the person who attached it or the supervisor.

If residual pressure remains in stopped pneumatic equipment, an authorized person must isolate the supply source and safely bleed the residual pressure.

Key points


  • (○ True) Before electrical repair, cut off power, lock and tag the switch, and verify zero voltage and discharged residual energy.

  • (○ True) Other workers must never remove or ignore a 'Do Not Operate' tag without confirmation from the installer or supervisor.

  • (○ True) Residual air pressure in stopped pneumatic equipment must be safely released by an authorized person after isolating the supply.
WordMeaning
power shutoff
locking (Lockout)
warning tag (Tagout)
zero voltage
residual pressure

Chemical Safety, Local Exhaust, Safety Colors, and Walkways

Before handling chemicals or organic solvents, check the Safety Data Sheet (SDS) to understand hazards and proper handling procedures.

If a required local exhaust ventilation system breaks down in an organic solvent work area, do not start work; report to the supervisor and wait.

Under JIS safety colors, red represents 'Prohibition', 'Stop', and 'Fire Protection' (yellow for caution, green for safety).

Wipe up spilled oil on factory floors immediately and cover cables crossing walkways to prevent slips and trips.

Key points


  • (× False) The document used to check chemical hazards before use is the Safety Data Sheet (SDS), NOT an outgoing inspection certificate.

  • (○ True) If a local exhaust system is out of order, do not begin work; report to the person in charge and wait until safety measures are restored.

  • (○ True) In JIS safety colors, red indicates 'Prohibition, Stop, and Fire Protection'; oil spilled on the floor must be wiped up immediately.
WordMeaning
organic solvent
local exhaust ventilation system
safety colors
fall (slip/trip) prevention

Material Handling (Cranes, Forklifts) and Health Management

During crane operations, never step under a suspended load, and inspect wire ropes before slinging for broken wires, kinks, wear, or corrosion.

When forklifts are operating, pedestrians must stay out of blind spots, walk in designated pedestrian walkways, and make eye contact with the driver.

When lifting a heavy object from the floor, stand close to the load, bend your knees to lower your hips, and lift with a straight back.

To prevent heatstroke, drink water and take salt regularly before feeling thirsty, and take appropriate rest breaks.

Key points


  • (○ True) Never enter under a crane's suspended load, and never use a wire rope with broken strands, kinks, or severe wear.

  • (○ True) Around forklifts, walk inside designated pedestrian walkways, avoid blind spots, and make eye contact with the operator.

  • (○ True) Lift heavy loads by bending knees and keeping your back straight, and take water and salt before feeling thirsty to prevent heatstroke.
WordMeaning
suspended load
slinging work (rigging)
kink (wire rope twist)
blind spot
heatstroke

Workplace Safety and Health

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Official references