1. What is a Way to identify a Forced Air Heating system and are the most commonly used in a heating system?

2. Gas appliance shutoff valves shall be located in the same room as the appliance and not further than _____________________ feet from the appliance.

3. A house heater should be able to maintain a temperature of _____________________°F, measured 3 feet above floors and 2 feet from walls.

4. For mechanical system installations in flood hazard areas, _____________________ _____________________ openings shall be located at or above the required elevation.

5. return air from a garage

6. Outdoor and return air for a forced-air heating or cooling system shall not be taken from _____________________.

7. What size are fuel-gas-fired domestic clothes dryer ducts?

8. The AC primary condensate drain line cannot drain into the _____________________ _____________________ line, only to an under-sink P-trap or outside in an obvious location.

9. All Air from Inside the Dwelling: If all combustion air is taken from the inside of the dwelling, then two permanent openings should be installed. One opening should be within ........ inches of the top and one within ...... inches of the bottom of the space. Each opening shall have a free area equal to a minimum of 1 square inch per 1,000 BTU-per-hour input rating of all appliances installed within the space, but not less than 100 square inches.

10. Maximum length of a gas dryer vent is _____________________ feet, while other dryers have a maximum vent length of 25 feet.

11. Difference between a perimeter & a plenum duct system?

12. B- and L-vents must extend at least _____________________feet above the roof and anything else within 8 feet.

13. thermostat; furnace controls; heat exchanger; gas burners; ignition system; blower fan; and air filter.

14. Stud wall cavities and the space between floor joists can be used as plenums, under several conditions: These spaces can not be used for supply air. These spaces must not be part of a fire-resistance assembly. These spaces must not convey air from more than one floor level of a house. These spaces must be isolated from adjacent concealed spaces with fireblocking. These spaces in the outside walls of a house must not be used as air plenums.

15. The primary condensate drain for an AC has a minimum slope of _____________________ inch.

16. Describe three types of burners relative to the draft

17. There are two common types of perimeter duct systems: perimeter loop and perimeter radial. Describe them.

18. causing backdraft or flame rollout conditions.

19. Where a space for a _____________________ _____________________ is provided, an exhaust duct system shall be installed.

20. Gas shutoff valves should be either _____________________ or yellow.

21. May be used in an electronic ignition system. It consists of a sensor filled with mercury, a capillary tube, and a switch. The burner flame heats up the sensor.

22. A common deficiency with vent hoods is that they are _____________________.

23. The AC primary condensate drain line should be at least _____________________ inches in diameter, with a 1/8 inch slope.

24. Disadvantages of Warm-Air Heating Systems

25. A 4-inch radius mitered 45 degree elbow dryer exhaust duct fitting shall reduce the maximum 35-foot length of a dryer duct by _____________________ feet, _____________________inches.