Refrigeration and Air Conditioning Quiz

What are the properties of air that affect air distribution system design or installation?

• Weight of air, manner in which air absorbs light, air separation into layers, air obeys gas laws

• Color of air, taste of air, air separation into layers, air obeys gas laws

• Weight of air, manner in which air absorbs heat, air separation into layers, air obeys gas laws

• Weight of air, manner in which air absorbs heat, air separation into layers, air obeys liquid laws

What is the purpose of an air curtain?

• To block infiltration of outside air through an opening

• To maintain inside air conditions by allowing outside air to enter

• To increase the flow of conditioned air out

• To stop the flow of unconditioned air in

What is the formula to determine the required air exchange rate?

• Number of occupants × 20 cfm

• Number of occupants × 10 cfm

• Number of occupants × 15 cfm

• Number of occupants × 25 cfm

What is the purpose of a fire damper?

• To close automatically on detection of heat

• To increase the flow of air into a room

• To stop the flow of conditioned air out

• To maintain inside air conditions by allowing outside air to enter

What is the purpose of a whole house fan?

• To maintain inside air conditions by allowing outside air to enter

• To stop the flow of unconditioned air in

• To increase the flow of conditioned air out

• To provide a building with free cooling by blowing out hot air and drawing in cool air

What is the purpose of dampers in forced-air systems?

• To increase the flow of conditioned air out

• To control airflow, allow or stop airflow, and balance airflow

• To stop the flow of unconditioned air in

• To maintain inside air conditions by allowing outside air to enter

What is the purpose of an evaporative cooling system?

• To increase the flow of conditioned air out

• To store heat or energy within moisture in air

• To maintain inside air conditions by allowing outside air to enter

• To stop the flow of unconditioned air in

What is the purpose of a heat recovery ventilator (HRV)?

• To increase the flow of conditioned air out

• To control fresh-air intake and maintain positive pressure

• To stop the flow of unconditioned air in

• To maintain inside air conditions by allowing outside air to enter

What is the purpose of a gable fan?

• To ventilate the attic by using louvers or vents

• To increase the flow of conditioned air out

• To stop the flow of unconditioned air in

• To maintain inside air conditions by allowing outside air to enter

What is the purpose of a spiral duct?

• To stop the flow of unconditioned air in

• To deliver air to conditioned space and move air from higher-pressure areas to lower-pressure areas

• To maintain inside air conditions by allowing outside air to enter

• To increase the flow of conditioned air out