HVAC Study Guide with 100% Complete Solutions

HVAC Study Guide with 100% Complete Solutions Why is IAQ important? a) to provide a comfortable environment for occupants b) to provide enough oxygen for occupants c) to provide the right temperature for a productive environment for occupants d) to provide sufficient airflow for occupants e) to provide a healthy environment for occupants - Correct Answer ️️ -e) to provide a healthy environment for occupants What is not considered a contaminate? a) Carbon Dioxide b) Ozone c) Carbon Monoxide d) Oxygen e) Radon - Correct Answer ️️ -d) Oxygen What gas is the best indicator for the quality of air in a building? a) Oxygen b) Carbon Dioxide c) Ozone d) Carbon Monoxide e) Radon - Correct Answer ️️ -b) Carbon Dioxide What is not true statement about carcinogens? a) carcinogen exposure can cause irreversible health problems b) exposure to carcinogens might be unnoticeable c) the only source of carcinogens comes from environmental tobacco smoke (ETS) d) carcinogens are among the most significant contaminants e) the risk of cancer increases with level and time of exposure to carcinogens - Correct Answer ️️ -c) the only source of carcinogens comes from environmental tobacco smoke (ETS) How can concentration of contaminants be calculated? a) by adding the source strength to the ventilation rate b) by dividing the source strength by the ventilation rate c) by subtracting the ventilation rate from the source strength d) by multiplying the source strength by 1000 ppm e) by dividing the source strength by the production rate - Correct Answer ️️ -b) by dividing the source strength by the ventilation rate What is the recommended outdoor air ventilation rate per person for an office space according to ASHRAE Standard 62-1989? a) 20 cfm b) 45 cfm c) 100 cfm d) 300 cfm e) 1000 cfm - Correct Answer ️️ -a) 20 cfm What is not a primary way to affect air quality control? a) ventilation b) source control c) humidity control d) air cleaning e) use of outdoor air - Correct Answer ️️ -c) humidity control Which method is not part of source control? a) keep chemicals out of conditioned spaces b) eliminate mold spores in ducts c) use of exhaust hoods d) use of filters e) maintain a positive pressure gradient - Correct Answer ️️ -d) use of filters What is the incorrect statement? a) The Indoor Air Quality Procedure usually results in lower operation costs compared to the Ventilation Rate Procedure. b) The Ventilation Rate Procedure prescribes the rate at which outdoor air must be delivered to all conditioned spaces. c) The Ventilation Rate Procedure is less expensive than the Indoor Air Quality Procedure because outdoor is delivered directly to the building and therefore the ventilation efficiency of each room does not have to be taken into account. d) The Indoor Air Quality Procedure achieves acceptable air quality by restricting the concentration of all known and specifiable contaminants. e) The Indoor Air Quality Procedure is the most desirable method to achieve indoor air quality but it is difficult to implement and more expensive compared to the Ventilation Rate Procedure. - Correct Answer ️️ -c) The Ventilation Rate Procedure is less expensive than the Indoor Air Quality Procedure because outdoor is delivered directly to the building and therefore the ventilation efficiency of each room does not have to be taken into account. What is the best placement for an outdoor air intake? a) close to the air exhaust to be able to use heat recovery devices b) away from sources of pollutants c) at ground level d) on the top of the roof e) on the side of the building that does not face a street - Correct Answer ️️ -b) away from sources of pollutants What is usually not considered to be a part of the secondary system? a) pump b) chiller c) filter d) duct e) fan - Correct Answer ️️ - What is the most common fuel supplied for residential heating