Video summary

산업안전기사 실기 필답형(서술형) 2016~2026년 2회 압축 기출문제 풀이(01~50번) [네오스터디]

Main summary

Key takeaways

Educational

Main ideas / lessons conveyed

The speaker repeatedly frames the session as “compressed past exam problem solving” for the Korean Industrial Safety and Health Engineer (산업안전기사 실기 필답형/서술형) exam style.

Key lessons include:

  • High-frequency questions should be memorized well, but even once-asked questions may reappear—don’t ignore them.
  • For legal/regulatory items, omitting required terms (including parentheses) or changing wording can cause zero scoring.
  • Strong emphasis on memory strategies, including:
    • mnemonics/acronyms
    • “first letters only” memorization
    • narrative cues

The topics covered span a wide range of workplace safety regulations, such as:

  • Machine/vehicle safety: forklifts, cranes, mobile cranes, lifting chains, scaffolds, air compressors
  • Fire classification and explosion-proof standards
  • PPE and protective device certification
  • Safety signage, posting requirements, and no-entry rules
  • Training and education categories
  • Work illumination standards, stairs/temporary passageways, and fall prevention
  • Reporting/administrative compliance: serious accidents, process safety report items, excavation safety inside structures

Methodology / instruction patterns (as presented)

Memorize exactly as required by law

  • Do not omit parentheses or required phrases—legal question format matters.
  • If the speaker gives an exact phrasing or mnemonic cue, treat the corresponding regulatory terms as “must-include.”

Do not discard low-frequency items

  • Even questions that appeared once in 10 years can still be used to reduce your score.

Use structured memorization

  • Memorize tables as a whole, not only blank spaces.
  • For long lists:
    • memorize only the checked items (e.g., first 1–5)
    • use acronyms or first letters
  • If asked for “symbols,” include required prefixes (e.g., “2X”) and follow the given sequence exactly.

When filling blanks with numeric ranges

  • Follow the exact inequality direction (e.g., “≥”, “≤”, “between 20 and 30,” etc.).
  • For illumination ranges phrased as “lux or more”, the speaker warns that writing only the lower end inside parentheses may be treated incorrectly (scoring risk).

Detailed bullet list of the main exam questions’ required items (by question number)

Question 1 (Forklift head guard requirements)

  • Strength requirement
    • Must withstand a uniformly distributed load of 2× the forklift’s maximum load.
    • If exceeding 4 tons, apply the 4-ton 기준 adjustment as stated.
  • Opening width (upper frame)
    • Each opening width in the upper frame must be < 16 cm.
  • Head height standard (Korean Industrial Standard) for driver
    • Standing: 1.905 m
    • Sitting: 0.903 m
  • Memory cue: forklift driver “Kang Sang-un” (memorize as stated).

Question 2 (Explosion-proof class safety gaps for gas)

Using KGSGC 2011 gas explosion-proof standards, list safety gaps:

  • IIIA (propane): gap ≥ 0.9 mm
  • IIB (ethylene): 0.5 mm < gap < 0.9 mm
  • IIC (hydrogen & acetylene): 0.5 mm to 5 mm

Question 3 (Pre-work inspection for repeated handling of heavy objects)

  • Two pre-work inspection items:
    • Correct posture for handling heavy objects
    • Protective equipment / measures to prevent dispersion of hazardous materials
  • “Answer core” handling methods:
    • Handling methods for heavy materials posing risk due to temperature rise or humidity
    • Examples: carbide, quicklime
  • Memory cue: “the car a lieutenant rides” (Jungwi-ka).

Question 4 (Fire classification table colors)

  • Class A: white
  • Class B: yellow
  • Class C: blue
  • Metal fire (often treated as related to metal/secondary fire): colorless
  • Instruction: memorize the whole table.

Question 5 (Acetylene welding machine inspection items)

  • Three inspection items:
    • Valve operating condition
    • Exposure presence/absence (as stated)
    • Abnormalities in operation of backfire arrestor connection and valve
  • Mnemonic cue: “Belnu Station”.

Question 6 (Safety glasses types + usage classification)

  • Two types:
    • Glass supplementary glasses
    • Plastic goggles
  • Usage classification:
    • Both protect eyes from flying debris (glass via glass lens; goggles via plastic lens)
  • Also mentioned: prescription glasses with a “lid” concept as part of the narrated answer set.

Question 7 (Serious accident reporting requirements)

Employer must report without delay (4 items implied in narration):

  1. Occurrence of the serious accident
  2. Damage situation
  3. Measures taken
  4. Future prevention outlook

Mnemonic cue: “take action on damage that has occurred, forecast it to prevent it, and prevent it …”

Question 8 (Types of lifting equipment)

  • Five types (as narrated):
    • Cranes and hoist arms
    • Mobile cranes
    • Lifts
    • Door lifts (loading capacity 0.1 tons or more)
    • Gondola
  • Mnemonic cue/acronym: “Keu-i-li Gon-seung”
  • Warning: include the full answer including parentheses.

Question 9 (Wire ropes prohibition on suspended scaffolding)

Standards prohibiting use (memorize parts 1–5; “checked in red”):

  1. Has seams
  2. Twisted
  3. Severely deformed or corroded
  4. Damaged by heat and electric shock
  5. Reduction in diameter exceeds 7% of nominal diameter

Memory cue using first letters: “Ip-eup-sim-yeol-ji”

Question 10 (Employer safety/health training types)

  • Four training types:
    • Electrical training
    • Training upon hiring
    • Training when work content changes
    • Special training
  • Also mentions “basic health training for construction industry” in the narrative.

Question 11 (Preparing MSDS: 5 excluded items)

From MSDS preparation items (classification/labeling/standards for chemical substances), memorize 5:

  • Volatile hazards
  • Emergency treatment (ghosts = “treatments” per narration)
  • How to handle an explosion
  • How to handle a leak
  • Exposure control and personal protection

Memory cue: “Yuhungnunho …” (as narrated).

Question 12 (Process safety report items)

Four items:

  • Process safety data
  • Process risk assessment report
  • Safe operation plan
  • Emergency response plan

Emphasis: public safety even in emergencies. Memory cue: “Public Security”.

Question 13 (Scaffolding inspection after rain/snow or after assembly/dismantling)

Memorize items 1–5 (out of 6):

  1. Damage to scaffolding material and attachments / jamming status
  2. Loosening condition of relevant connections / connecting beams
  3. Damage/corrosion to connecting materials and parts
  4. Whether the handle detached
  5. Column skirt condition: deformation/change/shaking state

Mnemonic described as a ballet sequence.

Question 14 (Air compressor pre-operation inspection items)

Four items (narrated):

  1. External condition of air storage pressure vessel
  2. Installation and drainage of drain valve
  3. Function of pressure relief device
  4. Function of all-load valve

Memory mnemonic via first letters: “Gongap Undeup Un …”

Question 15 (Maslow vs Alderfer’s G Theory fill-in)

  • Maslow
    • 2nd stage: safety needs
    • 3rd stage: social needs (need for relatedness; recognition also mentioned)
  • G Theory
    • self-improvement is a growth need
  • (Fill-in mapping described as the answer continues.)

Question 16 (Machinery/equipment requiring protective measures before installation/use/display)

  • Must not be installed/provided/displayed for transfer/lease without protective measures.
  • Examples in narration (answer set examples):
    • Brush cutter
    • Centrifuge
    • Air compressor
    • Metal cutter
    • Forklift
  • Memory instruction: “familiarize yourself with the packaging machine” (as narrated).

Question 17 (Severity of injury: definitions)

Four types/definitions:

  • Pre-research disability: complete loss of labor function of the entire body
  • Some research on labor disability: loss of labor function in part of the body
  • Temporary inability to work: inability to engage in regular labor for a certain period
  • Mentions table classification by severity, including death, temporary/partial inability, and emergency measures if time.

Question 18 (Safety and health sign color standards)

  • Red: prohibition and warning
  • White: secondary use as blue or green (as narrated)
  • Black and white: rule at “0 N9.5” leading to “n.5” by subtraction of 10
  • (Fill-in blanks implied from the sign standard table.)

Question 19 (Definitions: UVCE and BLEV)

  • UVCE: vapor cloud explosion—vapor cloud diffuses and explodes rapidly upon ignition source contact.
  • BLEV: boiling liquid expanding vapor explosion—liquid boils, vapor expands, causing explosion.

Question 20 (Industrial accident response chronology fill-in)

Chronological measures:

  1. Handle emergency
  2. Investigate cause
  3. Formulate countermeasures
  4. Draw up and implement a plan for countermeasures
  5. Evaluate the result

Question 21 (When operator leaves vehicle-mounted machinery position)

Two compliance requirements:

  1. Lower device (fork/bucket/dipper) to the lowest position or ground
  2. Prevent sudden movement: stop engine and firmly apply brakes

Memory cue: “four-one”.

Question 22 (Explosion-proof structure markings)

Example marking:

  • Pressure-resistant explosion-proof structure symbol: D
  • Explosion class based on max safety gap: IIB (example max safety gap 0.8 mm)
  • Temperature class: T5 (example max surface temperature 90°C)

Marking format instruction:

  • Add prefix “2X” before the structure symbol.
  • Then sequence: 2X + D + IIB + T5

Also mentions room structures to memorize:

  • room structure D
  • safety-enhancing room structure 2
  • inflow room structure 5
  • filling room structure Q
  • special room structure S

If writing symbols, add 2X before each.

Question 23 (Work illumination standards)

  • Ultra-precision work: 750 lux or more
  • Precision work: 300 lux or more
  • Ordinary work: 150 lux or more
  • Other work: 75 lux

Warning: if “lux or higher” is in parentheses and you write only up to the lower end, it may be treated as zero—write up to at least that threshold.

Question 24 (Posting requirements for workplaces handling hazardous substances)

Five posted items:

  1. Name of controlled substance
  2. Effects on human body
  3. Handling precautions
  4. Wearing protective equipment
  5. Emergency measures and emergency pest control (as narrated)

Memory cue: “Gwanin Chwichak”.

Question 25 (“No Entry for Unauthorized Personnel” sign categories)

Three types:

  • Workplace for substances requiring permission
  • Workplace for handling or dismantling materials
  • Laboratory for handling prohibited substances

Creator name: Heo Seok-geum (mnemonic).

Additional narration note (except for 2024):

  • Bottom of such signs includes two required items:
    • Action of protective suit
    • Smoking and food consumption prohibition (treated as a set)

Question 26 (Regular training content for supervisors)

Five items among 12 (as narrated):

  • Matters concerning industrial safety and prevention
  • Fire/explosion representative actions
  • Matters concerning industrial health and prevention of health disorders
  • Emergency response entity matters for heat/cold work-related health impairment
  • Matters concerning job stress prevention/management

Also mentions harassment/customer abuse health disorder prevention/management as part of the longer set.

Question 27 (Mobile crane pre-operation inspection items)

Three items:

  1. Function of overwinding prevention device or other alarm devices
  2. Function of brake clutch and control device (warns against splitting words incorrectly)
  3. Condition of wire rope passages and work site

Memory instruction: do not split into brake/clutch/adjustment as separate answers.

Question 28 (Machines/facilities subject to safety certification)

Four items (choosing the short 5 in narration):

  • Press
  • Crane
  • Lift
  • Roller
  • Gondola

Memory cue via first letters: “Free Rollgon …”

Question 29 (Stairs installation standards)

  • Load/support
    • Structure must withstand at least 500 kg/m²
    • Safety factor at least 4
  • Width
    • At least 1 m
    • Exceptions: emergency stairs for refueling/maintenance, spiral stairs, movable stairs with height < 1 m
  • Rails
    • For stairs higher than 3 m, rail height at least 1.2 m
    • Installed at intervals ≤ 3 m along travel direction
  • Open-sided handrails
    • Install open-sided handrails on stairs 1 m or higher
  • Note: practice-checked blue blanks may be left blank; ensure those are included too.

Question 30 (Electrical machinery/equipment using grounded cords/plugs: leakage current shock prevention)

Five categories:

  1. Operating voltage exceeds 150V ground voltage
  2. Stationary electric appliances (refrigerators, washing machines, computers, peripherals)
  3. Stationary/mobile/portable electric machinery/equipment
  4. Ungrounded electrical machinery/equipment used in water or highly conductive areas
  5. Portable flashlight

Mnemonic phrase: “Sanhaenggo Mulyu”

Question 31 (Injury termination types on industrial exclusion survey form)

Memorize red-checked six items:

  • Fracture
  • Amputation
  • Bruises
  • Abrasions
  • Burns
  • Electric shock

Question 32 (Class 1 dust mask usage locations)

Three places:

  1. Places where dust is generated (excluding cases requiring special masks)
  2. Places where thermally generated dust is generated (example: metal forces per narration)
  3. Excluding cases acceptable with Class II dust mask (e.g., mechanical dust or presence of silicon)

Question 33 (Photoelectric protective device press: key requirements)

  • Device description:
    • Consists of projection, reception, control sections
    • Stops machine immediately if body blocks light beam
    • A-1 classification
  • Indicators:
    • Normal operation lamp: green
    • Danger lamp: red
    • Install where workers can easily see them
  • Performance requirements:
    • Must not cause unexpected sliding operation due to failure of relay/limit switch and due to power supply fluctuations/outages
    • Must operate normally under ±20% power supply voltage fluctuations

Question 34 (Temporary passageway installation standards)

Key items (as narrated):

  • Keep primary temperature below 30°C, except where stairs are installed or sturdy handrails on temporary passageways < 2 m
  • If slope exceeds 15°, construct to prevent slipping
  • Install safety railings where there is falling risk; if unavoidable, only temporarily dismantle necessary parts
  • If vertical shaft passage length ≥ 15 m, install scaffolding platform every 10 m or less
  • For scaffolding bridges in construction ≥ 8 m, install landings every 7 m or less

Question 35 (Construction industry prevention plan submission projects)

Memorize items 1–4:

  1. Construction work (example: light work in tunnel)
  2. Excavation work with depth ≥ 10 m
  3. Construction work such as bridges with maximum span ≥ 50 m
  4. Equipment installation and insulation work for cold storage facilities with total floor area ≥ 5,000 m²

Note: “tunnel depth of 10 m is the maximum opening” (as narrated).

Question 36 (Lifting chain criteria that cannot be used)

Two criteria:

  1. Lifting chain length exceeds 5% of length when attached
  2. Ring cross-sectional diameter decreased by more than 10% from manufacturing diameter

Additional disqualifier mentioned:

  • If chain is cracked or severely deformed

Memory cue: “hanging bacteria” (Darlin)

If modified for “usable chain” question on suspended scaffolds:

  • write as 5% or less, 10% or less, no cracks/severe deformation.

Question 37 (Grounding metal parts to prevent electric shock)

Ground three metal parts (for equipment not using electrical power):

  1. Frame and track of an electric lifting system
  2. Frame of a non-electric lifting system to which wires are attached
  3. Metal shielding or similar devices around electrical machinery/equipment using high voltage or higher

Mnemonic cue: electric wire is “high-strength”.

Question 38 (Assembling/using horses: compliance requirements)

Three compliance requirements narrated:

  1. Install anti-slip device on bottom of support structure; workers must not stand on either end while working
  2. Supporting members inclination and “Supacman” ≤ 75°; install auxiliary member to fix supporting members together
  3. If horse trap height > 2 m, work platform width ≥ 40 cm

Question 39 (Work plan items for building demolition)

Memorize up to number 5 (out of 6):

  1. Disposal plan for demolition materials
  2. Dismantling method and dismantling sequence drawings
  3. Plan

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