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Questions and Answers
Emergency lighting systems must be provided in all important stairways, exits, workplaces, and passages in buildings more than one story in height.
Emergency lighting systems must be provided in all important stairways, exits, workplaces, and passages in buildings more than one story in height.
True
Emergency lighting systems should maintain a minimum intensity of 10 lux for at least one hour.
Emergency lighting systems should maintain a minimum intensity of 10 lux for at least one hour.
False
The emergency lighting system can rely on the general lighting system installation as its energy source.
The emergency lighting system can rely on the general lighting system installation as its energy source.
False
Atmospheric conditions in workrooms should avoid excessive humidity but do not need to avoid excessive dryness.
Atmospheric conditions in workrooms should avoid excessive humidity but do not need to avoid excessive dryness.
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Mechanical ventilation must be provided where it is impossible to achieve the desired amount of air at the center of workrooms without creating uncomfortable drafts near the inlets.
Mechanical ventilation must be provided where it is impossible to achieve the desired amount of air at the center of workrooms without creating uncomfortable drafts near the inlets.
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Mechanical ventilation is the only acceptable means to maintain suitable atmospheric conditions in workrooms.
Mechanical ventilation is the only acceptable means to maintain suitable atmospheric conditions in workrooms.
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An average rate of 30 to 50 cubic meters per hour per worker is required for clean fresh air supply in enclosed workplaces according to the text.
An average rate of 30 to 50 cubic meters per hour per worker is required for clean fresh air supply in enclosed workplaces according to the text.
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The air movement in enclosed workplaces should be arranged to ensure workers are exposed to objectionable drafts.
The air movement in enclosed workplaces should be arranged to ensure workers are exposed to objectionable drafts.
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During the summer season, the air velocity in enclosed workplaces must not exceed 45 meters per minute.
During the summer season, the air velocity in enclosed workplaces must not exceed 45 meters per minute.
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The temperature in enclosed workplaces should always remain constant and not vary based on the type of work being performed.
The temperature in enclosed workplaces should always remain constant and not vary based on the type of work being performed.
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Employees must be protected against excessive temperature due to steam and hot water pipes by insulation of equipment only.
Employees must be protected against excessive temperature due to steam and hot water pipes by insulation of equipment only.
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General ventilation is sufficient in all cases and mechanical ventilation is not necessary even if natural ventilation fails to provide adequate fresh air.
General ventilation is sufficient in all cases and mechanical ventilation is not necessary even if natural ventilation fails to provide adequate fresh air.
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Workers using air line respirators must have safety harnesses and safety lines for emergency rescue.
Workers using air line respirators must have safety harnesses and safety lines for emergency rescue.
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For the safe use of any respirator, the user does not need to be properly instructed in its selection, use, and maintenance.
For the safe use of any respirator, the user does not need to be properly instructed in its selection, use, and maintenance.
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A program for the maintenance and care of respirators should be tailored to the type of plant, working conditions, and hazards involved.
A program for the maintenance and care of respirators should be tailored to the type of plant, working conditions, and hazards involved.
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Hard hats used for protection from falling objects should be made of highly combustible materials.
Hard hats used for protection from falling objects should be made of highly combustible materials.
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Workers exposed to limited electric shock and burns do not require hard hats for protection.
Workers exposed to limited electric shock and burns do not require hard hats for protection.
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Hard hats used in electrical environments must be conductors of electricity.
Hard hats used in electrical environments must be conductors of electricity.
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Study Notes
Internal Combustion Engines
- Internal combustion engines fueled by gasoline, diesel, or LPG must be located in workrooms to prevent exhaust gases from entering the atmosphere.
- This is to prevent harm to workers in the workrooms.
Emergency Lighting
- Emergency lighting systems are required in buildings with more than one story and many employees.
- Emergency lighting systems must provide a minimum intensity of 5 lux (0.5 ft.candle) for at least one hour.
- The energy source for emergency lighting must be independent of the general lighting system.
General Ventilation
- Atmospheric conditions in workrooms must be maintained to prevent insufficient air supply, stagnant or vitiated air, harmful drafts, and extreme temperatures.
- Clean fresh air must be supplied to enclosed workplaces at a rate of 20 to 40 cubic meters (700 to 1400 cu.ft.) per hour per worker.
- The air supply rate may vary depending on the type of work, with sedentary workers requiring a lower rate and active workers requiring a higher rate.
- Mechanical ventilation is required if natural ventilation cannot provide an adequate supply of fresh air.
- Air movement in enclosed workplaces must not create objectionable drafts.
- The air velocity should not exceed 15 meters (50 ft.) per minute during the rainy season and 45 meters (150 ft.) per minute during the summer season.
Temperature and Humidity
- A suitable temperature for the type of work performed must be maintained in enclosed workplaces.
- The temperature and humidity levels must be adjusted according to the type of work.
- Employees must be protected from radiation and excessive temperature due to steam and hot water pipes or other heated machinery or equipment.
- Self-contained breathing apparatus or hose masks with blowers must be used with standby men and rescue equipment in atmospheres dangerous to life or health.
- Persons using air line respirators in hazardous atmospheres must be equipped with safety harnesses and safety lines for lifting or removing persons.
Respirator Maintenance and Care
- A program for the maintenance and care of respirators must be adopted to the type of plant, working conditions, and hazards involved.
- The program must include inspection for defects, cleaning and disinfecting, and repair and storage.
Head Protection
- Hard hats must be provided for workers in areas with a reasonable probability of exposure to impact, penetration, blows, and electric shock.
- Hard hats must be made of noncombustible or slow-burning materials and must not conduct electricity when used in electrical environments.
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Description
Learn about the importance and regulations of mechanical ventilation in enclosed workplaces to ensure adequate fresh air supply without creating uncomfortable drafts for workers. Explore the recommended air movement and velocity guidelines.
