OSH Officer Knowledge Test (ХАБЭА-н ажилтны мэдлэг үнэлэх сорил, Mongolia)

Under Article 27.2 of Mongolia's Law on Labour Safety and Hygiene, which factors must an employer take into account when deciding what OSH structure, officer (ажилтан) and council to maintain?

• AIts annual revenue, the share of foreign ownership, and the number of shareholders
• BThe nature of its production or services, the workplace risk level, and its headcount
• CThe total floor area of its premises, the age of its equipment, and its location
• DIts accident record over the past five years and the insurance premium it pays

Under Annex 1 of Order A/130 (§3.4.2), what must an OSH officer trainee achieve to be counted as having completed the training?

• A100% attendance, at least 75% on the knowledge test, and a written report on a workplace…
• BAt least 90% attendance, at least 80% on the knowledge test, and a signed employer refere…
• C100% attendance, at least 80% on the knowledge test, and a satisfactory practical skills…
• D100% attendance and at least 80% on the knowledge test, with no further assessment requir…

Order A/130 Annex 1 (§2.6) excludes one group of people from OSH officer training (ХАБЭА-н ажилтны сургалт). Who are they?

• AEngineers with at least ten years of experience in a hazardous industry
• BPeople who graduated from a higher education institution in the OSH profession
• CEmployers and senior managers who complete the annual employer course
• DLicensed occupational physicians who carry out workers' medical examinations

Under Article 18.1.4 of the Law on Labour Safety and Hygiene, what may an employee do when a safety rule is breached during work and a condition dangerous to life or health arises?

• AStop the work and inform the employer about the situation
• BKeep working but record the hazard in the next monthly report
• CLeave the job and end the employment contract without notice
• DRepair the machinery or wiring personally before telling anyone

Under Order A/130 Annex 1 (§4.16), how long is the certificate issued to OSH officer training graduates valid, and how is it extended?

• A3 years; the holder retakes the knowledge test on the OSH Center's electronic system
• B5 years; the holder repeats the full 124-hour course with an approved provider
• C3 years; the training provider extends it after a one-day refresher seminar
• D1 year; the employer extends it by submitting a performance evaluation

Article 27.7 of the Law on Labour Safety and Hygiene covers an employer whose workforce is below the staffing level at which an in-house OSH structure or officer is required. How may it meet its OSH duties?

• ABy asking the district governor's office to exempt it from OSH duties
• BBy having its employees sign waivers accepting the workplace risks
• CBy contracting a specialised OSH organisation or qualified OSH officer
• DBy buying accident insurance instead of running any OSH programme

Which statement about the OSH officer knowledge test under Order A/130 Annex 1 (§4.10, §4.11, §4.15, §6.1) is correct?

• AEach training provider writes its own test questions, and trainees may retake the test as…
• BThe OSH Center runs the electronic test system, renews the questions every 6 months, and…
• CThe OSH Center runs the test system, renews the questions every year, and allows one reta…
• DThe labour inspectorate writes the questions, and trainees who fail must repeat the full…

What is the main safety function of a fixed barrier guard around the point of operation of a mechanical power press?

• AIt stops the ram automatically when a sensor detects a hand near the die
• BIt physically keeps every part of the body out of the danger zone while the press runs
• CIt lets the operator reach the die safely as long as the press runs at low speed
• DIt warns the operator with a light or buzzer before each stroke begins

An OSH officer is planning roof-edge work. Following the hierarchy of controls, which fall-protection measure should be considered first?

• ADo the work from the ground, or fit guardrails along the edge
• BPost warning signs and a safety observer along the roof edge
• CIssue each worker a full-body harness with a shock-absorbing lanyard
• DTrain the workers to move carefully and keep away from the edge

In a lockout/tagout (LOTO) procedure, which step must follow the application of locks and tags and come before any maintenance work begins?

• ARemove the machine guards so that the maintenance work can begin quickly
• BGive the lock key to the shift supervisor for safekeeping during the job
• CSwitch the isolator back on briefly to confirm that the lock is holding
• DVerify zero energy by trying the controls and testing that circuits are dead

Widely used confined-space entry criteria, such as US OSHA's and Australia's AS 2865, treat an atmosphere as breathable without supplied air only within which oxygen range?

• A16.0% to 19.5% by volume
• B19.5% to 23.5% by volume
• C23.5% to 26.0% by volume
• D12.0% to 16.0% by volume

What is the main safety purpose of a 30 mA residual current device (RCD) on portable electric tools and temporary construction-site power boards?

• ATo cut the supply fast when current leaks to earth, e.g. through a person
• BTo protect cables from overheating under a sustained overload current
• CTo prevent voltage dips when several large motors start at the same time
• DTo limit lightning surges entering the site from the overhead supply line

Which arrangement is correct for storing full oxygen cylinders and acetylene cylinders in the same storage area?

• ASide by side, provided every cylinder has its valve protection cap fitted
• BOxygen kept apart from fuel gas by distance or a fire wall, all upright and secured
• CAll laid horizontally on the floor so that none of the cylinders can fall over
• DTogether in a closed, unventilated cabinet so that any leaks stay contained

Unless a trench is very shallow or cut in stable rock, why does it need a protective system such as sloping, benching, shoring or a trench box before workers enter?

• ABecause protective systems stop groundwater from seeping into the excavation
• BBecause shoring lets heavy vehicles drive right up to the trench edge safely
• CBecause the walls can collapse without warning and bury or crush a worker
• DBecause a protective system removes the need to inspect the trench each day

What is the main safety purpose of the safety (pressure-relief) valve on a steam boiler or pressure vessel?

• ATo show the operator the current pressure inside the vessel
• BTo release pressure automatically before it exceeds the permitted limit
• CTo let the operator drain condensate from the bottom of the vessel
• DTo hold the vessel at a constant pressure during normal operation

During a pre-use inspection of a full-body harness and webbing lanyard, which finding means the equipment must be withdrawn from use immediately?

• ACut or frayed webbing, damaged stitching, or a deployed shock absorber
• BThe manufacturer's label is faded but still fully readable
• CLight surface dust that brushes off without leaving any marks
• DThe harness was last used a week ago during work in cold weather

A mobile crane must work near an overhead power line. Which approach reflects safe practice?

• AGo ahead if the crane has rubber tyres, because the tyres insulate it from earth
• BKeep the same small clearance from every line, because voltage makes no difference
• CAssume the line is dead if it has not appeared to carry power recently
• DTreat it as live, keep beyond the approach distance for its voltage, use a spotter

During a confined-space entry, what is the main duty of the standby attendant stationed outside the entrance?

• AEnter the space at once to help any entrant who reports feeling dizzy
• BLeave the entrance briefly to fetch any tools the entrants ask for
• CStay at the entrance, keep contact with entrants, and call rescue without entering
• DSupervise other nearby work while checking on the entrants from time to time

A 10-tonne load is lifted with a symmetrical two-leg sling. If the angle between each leg and the horizontal falls from 60° to 30°, what happens to the tension in each leg?

• AIt stays at 5.0 t, because the weight of the load has not changed
• BIt falls from about 5.8 t to 5.0 t per leg
• CIt rises from 5.0 t to about 5.8 t per leg
• DIt rises from about 5.8 t to 10.0 t per leg

Four technicians are repairing a conveyor drive at the same time. What lockout arrangement is correct?

• AEach technician applies a personal lock to a multi-lock hasp at every isolation point
• BOnly the lead technician applies a lock, and the others work under that one lock
• COne lock is applied, and its key is kept in the control cabinet for the team
• DThe supervisor signs a work permit, which replaces locks for short repairs

Which practice for spoil, materials and plant around an open trench is correct?

• APile the spoil right at the edge so that it forms a barrier around the trench
• BKeep spoil, materials and plant back from the edge by a set safe distance
• CPlace the spoil on the lip of the trench, provided it is compacted by hand
• DPark heavy plant at the edge so that its weight braces the trench wall

Why is a fire watch kept at a hot-work site for a period after welding or cutting has ended, instead of being stood down as soon as the torch is switched off?

• AWelding fumes stay toxic for hours and must be measured before anyone leaves
• BThe watch must confirm that the gas cylinders have cooled before they are moved
• CSparks and hot slag can smoulder unseen in gaps or combustibles and flare up later
• DThe hot-work permit expires only after an inspector signs it off in person

What test pressure is typically used for a hydrostatic proof test of an industrial pressure vessel, relative to its design or maximum allowable working pressure?

• AAbout 1.25 to 1.5 times the design or maximum allowable working pressure
• BExactly the maximum allowable working pressure and never any higher
• CAbout half the maximum allowable working pressure, to avoid damage
• DAbout 3 to 5 times the maximum allowable working pressure, to be safe

A scaffold working platform has edge protection made up of a top rail, an intermediate (mid) rail and a toe board. What is the purpose of each component?

• ATop rail anchors harnesses; mid-rail supports stacked materials; toe board strengthens th…
• BTop rail marks the edge visually; mid-rail and toe board are optional if harnesses are wo…
• CTop rail stops people falling over; mid-rail stops them slipping under; toe board stops o…
• DTop rail blocks the wind; mid-rail holds debris netting; toe board gives a step up onto t…

What is the key requirement of a two-hand control device on a metal stamping press?

• AEither button alone starts the stroke, so the operator can choose which hand to use
• BBoth buttons must be pressed almost together and held during the hazardous part of the st…
• CThe buttons may be pressed in any order at any interval, as long as both are pressed
• DOne button starts the stroke and the other button stops it in an emergency

In what order should the atmosphere of a confined space be tested with a direct-reading gas detector before entry?

• AOxygen, then flammable gases, then toxic gases
• BToxic gases, then flammable gases, then oxygen
• CFlammable gases, then oxygen, then toxic gases
• DOxygen, then toxic gases, then flammable gases

What is the main safety purpose of connecting the exposed metal casing of electrical equipment to a protective earth conductor?

• ATo reduce the equipment's normal power consumption and running costs
• BTo stop electromagnetic interference from reaching nearby radio equipment
• CTo let the equipment run safely without any fuse, breaker or RCD fitted
• DTo give fault current a low-resistance path so that the protective device trips

Using the simple additive method, what clearance is needed below the anchor if the lanyard is 1.8 m long, the energy absorber extends by up to 1.2 m, harness stretch plus the distance from the back D-ring to the worker's feet is 1.5 m, and site policy requires a 1.0 m safety margin?

• A3.0 m
• B4.5 m
• C5.5 m
• D6.5 m

Along the accessible walkway of a 200 m belt conveyor at a mine, which emergency-stop arrangement reflects good practice?

• APull-wire stops along the walkway that latch off and need a manual reset
• BEmergency-stop buttons fitted only at the head and tail pulleys
• CA single emergency-stop button placed in the central control room
• DA warning horn that sounds for ten seconds before the belt starts

Workers lift 25 kg sacks from the floor onto a 1.5 m high truck bed about 200 times per shift. Which control should an OSH officer give priority to?

• ATrain the workers in correct lifting technique and remind them daily
• BIssue back-support belts to every worker who does the lifting task
• CRotate workers so that each person does the lifting for only two hours
• DFit a mechanical aid, such as a conveyor or lift table, to end the manual lift

When a portable leaning ladder is used to reach a landing, which two placement rules apply?

• AA 1:1 slope (about 45°) with the stiles ending level with the landing edge
• BA 4:1 slope (about 75°) with the stiles extending about 1 m above the landing
• CA 10:1 slope (almost vertical) with the top tied off to a nearby handrail
• DA 2:1 slope (about 63°) with the stiles ending level with the landing edge

A machine with hydraulic and pneumatic actuators is being isolated for maintenance. After the main electrical supply is locked off, which step controls the stored energy that remains?

• ALeave the hydraulic pressure on so that the cylinders stay clamped during the repair
• BRely on the PLC software interlock to keep the actuators from moving
• CLoosen a high-pressure fitting slightly so that the fluid bleeds out slowly
• DVent the pneumatics, bleed down hydraulic accumulators, and block raised parts mechanical…

Mongolian standard MNS 5002:2000 sets noise norms for workplaces. What equivalent sound level is the commonly cited norm for industrial workplaces?

• A70 dBA
• B85 dBA
• C95 dBA
• D100 dBA

In mining, quarrying and concrete cutting, long-term inhalation of respirable crystalline silica dust mainly causes which irreversible lung disease?

• AByssinosis, caused by cotton, flax or hemp dust in textile mills
• BAsbestosis, caused by inhaled asbestos fibres
• CSilicosis, a progressive nodular fibrosis of the lungs
• DOccupational asthma caused by flour enzymes

How does carbon monoxide (CO) cause poisoning in exposed workers?

• AIt binds haemoglobin far more strongly than oxygen, cutting oxygen delivery
• BIt irritates the airways and causes the lungs to fill with fluid
• CIt displaces oxygen from the air, acting mainly as a simple asphyxiant
• DIt blocks nerve signals to the breathing muscles, stopping respiration

Which combination of physical risk factors is the classic main driver of work-related musculoskeletal disorders among assembly and materials-handling workers?

• ARepetition, awkward or static postures, force, and little recovery time
• BPoor lighting, glare and screen flicker at the workstation
• CExposure to solvents, dusts and welding fumes in the work area
• DTask rotation, scheduled micro-breaks and adjustable workstations

In mining and transport, what is the main source of whole-body vibration exposure, and its typical long-term health effect?

• AUsing hand-held grinders, leading to blanching of the fingers
• BTyping at a keyboard, leading to carpal tunnel syndrome
• CWorking near loud compressors, leading to noise-induced hearing loss
• DDriving haul trucks and bulldozers, leading to lower-back disorders

Workers who give first aid or handle waste that may be contaminated with blood face bloodborne infections such as hepatitis B. Which control measures are appropriate?

• AWearing cotton work gloves and putting used needles into ordinary waste bags
• BRelying on hand washing at the end of each shift as the main control
• CUsing impermeable gloves and rigid sharps containers, and offering hepatitis B vaccination
• DTreating blood spills with precautions only when the person is known to be infected

A mill operator spends 4 hours of an 8-hour shift at a steady 90 dBA and the other 4 hours at 80 dBA. Using the equal-energy (3 dB exchange rate) method, what is the 8-hour equivalent level?

• A85.0 dBA
• BAbout 87.4 dBA
• C90.0 dBA
• DAbout 90.4 dBA

An underground jackhammer operator reports fingertips that turn white in the cold, reduced sense of touch, and weaker grip. Which occupational condition do these symptoms suggest?

• ACarpal tunnel syndrome caused by repetitive wrist flexion alone
• BDecompression sickness caused by nitrogen bubbles in the small vessels
• CHand-arm vibration syndrome, including vibration white finger
• DContact dermatitis caused by allergy to hydraulic oil additives

Which four physical parameters are measured to assess the thermal microclimate (бичил цаг уур) of a workplace?

• AAir temperature, oxygen content, noise level and lighting level
• BAir temperature, relative humidity, air velocity and radiant heat
• CDust concentration, humidity, barometric pressure and air velocity
• DSurface temperature, carbon dioxide, illuminance and wind direction

What is the main practical use of the wet bulb globe temperature (WBGT) index in managing occupational heat stress?

• AIt combines humidity, air movement and radiant heat with temperature in one index
• BIt measures only the dry-bulb air temperature, taken in shade away from the sun
• CIt measures the worker's core body temperature during heavy physical work
• DIt measures how much sweat a worker loses in each hour of heavy work

In asbestos removal and demolition, why are friable asbestos-containing materials treated as a much higher hazard than non-friable ones?

• AThey crumble under hand pressure and release respirable fibres
• BThey are always found outdoors, where wind spreads the fibres widely
• CThey release asbestos as a toxic gas when warmed to room temperature
• DThey always contain a higher percentage of asbestos by weight

In personal air sampling of a worker's exposure to a chemical vapour, where should the sampler inlet be placed?

• AIn the breathing zone, e.g. on the collar within about 30 cm of the face
• BAt the outlet of the workshop's general exhaust ventilation fan
• COn the nearest wall of the work area, at the worker's head height
• DAt belt level, clipped to the worker's tool belt or harness