Self-Test B-1.3 Residential Forced Air Heating and Cooling Systems

Complete Self-Test B-1.3 and check your answers.

1. What is the most common reason that forced-air heating systems are installed rather than electric baseboard or hydronic?
   1. The least costly to install.
   2. Filters the air being heated.
   3. Provides the most comfort.
   4. Operates without any noise.

    

2. What is the term for when the airflow through the system is adjusted in an attempt to deliver an even heat throughout the building?
   1. Air throttling
   2. Equalization
   3. Balancing
   4. Evening out

    

3. What is another term for airflow regulators?
   1. Valves
   2. Regulators
   3. Air stops
   4. Dampers

    

4. What is the current minimum required efficiency for new furnaces?
   1. 100%
   2. 90%
   3. 80%
   4. 78%

    

5. New furnace installations must be of which type?
   1. Evaporating
   2. Condensing
   3. Convecting
   4. Conducting

    

6. What is produced when carbon dioxide is allowed to mix with water in the flue of a gas-fired appliance?
   1. Carbon black
   2. Carbohydrates
   3. Carbonic acid
   4. Carbon tetrachloride

    

7. What category do high-efficiency furnaces fall under?
   1. I
   2. II
   3. III
   4. IV

    

8. What is the term for the style of burners used by mid- and high-efficiency furnaces?
   1. In-shot
   2. Up-shot
   3. Side-shot
   4. Buck-shot

    

9. What type of forced-air furnace would be used in a rancher-style house where the furnace sits on the main floor and the warm air ductwork is below the floor in the crawl space
   1. Up flow
   2. Top flow
   3. Down flow
   4. Horizontal flow

    

10. Which one of the following is not a type of furnace filter?
    1. Media
    2. Electronic
    3. Electrostatic
    4. Electromagnetic

     

11. Which one of the filters below generates a static charge when air flows through it?
    1. Media
    2. Electronic
    3. Electrostatic
    4. Electromagnetic

     

12. Where is the furnace blower located?
    1. Between the filter and heat exchanger
    2. Between the heat exchanger and the supply plenum
    3. Upstream of the return air plenum connection to the furnace
    4. Downstream of the supply air connection to the heat exchanger

     

13. How do you adjust the speeds of a belt-driven blower?
    1. Plug in different wires from speed taps on the motor
    2. Adjust a pulley attached to the blower wheel
    3. Adjust a pulley attached to the motor
    4. Replace the pulley on the blower

     

14. Which one of the following would not contain a heat exchanger of some variety?
    1. Gas furnace
    2. Oil furnace
    3. Heat pump
    4. Electric furnace

     

15. Which one of the following gains its heat by extracting it from the ground or outside air and transferring it to a refrigerant coil?
    1. Heat pump
    2. Gas furnace
    3. Hydronic coil
    4. Fuel oil furnace

     

16. What is the sequence of heated airflow in a trunk and branch duct system?
    1. Trunk, plenum, register, branch
    2. Plenum, trunk, branch, register
    3. Branch, plenum, trunk, register
    4. Register, plenum, trunk, branch

     

17. If zoning is desired in a forced-air system, what components must be installed?
    1. Heat exchangers
    2. Electronic air cleaners
    3. Motorized automatic dampers
    4. Condensers and evaporators

     

18. What is the main comfort control for a forced-air heating system?
    1. Thermostat
    2. High-limit switch
    3. Direct-drive motor
    4. Motorized damper

     

19. What component oversees the operation of the entire furnace and is found on most newer furnaces?
    1. Gas pressure regulator
    2. Blocked vent safety switch
    3. Motorized automatic damper
    4. Integrated furnace control

Answer Key: Self-Test B-1.3 is on the next page.