DBT40013 Unit 3.4: Ventilation & Indoor Air Quality

What is the main purpose of ventilation?

• Cool the room

• Create darkness

• Increase humidity

• Provide fresh air (oxygen)

Answer explanation

The main purpose of ventilation is to provide fresh air (oxygen) to the room, ensuring a healthy and breathable environment.

Which ventilation method allows chemicals to mix with the air in a room and then dilute to an acceptable level of exposure?

• Local Exhaust Ventilation System

• Natural Ventilation System

• General Ventilation System

• Mechanical Ventilation System

Answer explanation

The correct choice is the General Ventilation System, which allows chemicals to mix with the air in a room and then dilute to an acceptable level of exposure.

What is the function of a Local Exhaust Ventilation System component?

• To provide fresh air

• To shift and trap contaminants to prevent spreading

• To control air pollution

• To create air movement

Answer explanation

The function of a Local Exhaust Ventilation System component is to shift and trap contaminants to prevent spreading.

Which organization can provide a complete guideline for mechanical ventilation systems?

• Occupational Safety and Health Administration (OSHA)

• World Health Organization (WHO)

• American Society of Health and Refrigerating Engineers (ASHRAE)

• Environmental Protection Agency (EPA)

Answer explanation

The American Society of Health and Refrigerating Engineers (ASHRAE) can provide a complete guideline for mechanical ventilation systems.

What is the most common complaint related to indoor air quality?

• Fever

• Headache

• Chest pains

• Fatigue

Answer explanation

The most common complaint related to indoor air quality is not fever, but rather headache. Headache is often reported as a symptom of poor indoor air quality due to factors like pollutants or inadequate ventilation.

Which equipment is used to measure indoor air quality?

• Pedometer

• Hygrometer

• Barometer

• Thermometer

Answer explanation

The correct equipment used to measure indoor air quality is a Thermometer.

What can cause odor and diseases in a Heating, Ventilating and Air Conditioning (HVAC) system?

• Pollen

• Chemical fumes

• Micro-organisms

• Dust particles

Answer explanation

Micro-organisms can cause odor and diseases in a Heating, Ventilating and Air Conditioning (HVAC) system.

Which disease is caused by bacteria found in the HVAC system and can be similar to pneumonia?

• Tuberculosis

• Legionnaire's disease

• Influenza

• Malaria

Answer explanation

Legionnaire's disease is caused by bacteria found in the HVAC system and can be similar to pneumonia, making it the correct choice.

What is the purpose of an air conditioning system?

• To create air pollution

• To reduce oxygen levels

• To provide a comfortable indoor environment

• To increase humidity levels

Answer explanation

The purpose of an air conditioning system is to provide a comfortable indoor environment, not to create air pollution, reduce oxygen levels, or increase humidity levels.

Which factor defines a comfortable indoor environment?

• Uncomfortable temperature

• High noise levels

• Physical and mental distractions

• Poor lighting

Answer explanation

Physical and mental distractions define a comfortable indoor environment by minimizing disruptions and allowing individuals to focus and relax.