Flashcards: 7th pt3

C

2. Ducted heat management systems. a may only be used in commercial installation. b. must have a safety screen in front of the unit. c. may allow the installation of a television above the fireplace. d. must have a sprinkler system installed above the unit.

Chapter 10 Conventional Vent Appliance Installation Guidelines 1. According to the National Fuel Gas Code (NFPA 54), which of the following situations does not require a provision for outside ait for conventionally vented appliances? a. Unusually tight construction, confined space. b. Unusually tight construction, unconfined space c. Normal construction, confined space d. Normal construction, unconfined space

2. Which of the following is true about the damper opening requirement for vented gas log sets? a. The damper stop maintains a minimum opening whether the gas log set is being operated or not. b. The gas log set should not be operated with the damper opening greater than the opening size that the damper stop allows, c. The damper must be present and operable. d. Dampers with adjustable positions do not require a damper stop.

3. What type of venting systems used with factory built, conventionally vented gas fireplaces? a. Direct Vent b. Masonry c. Flexible stainless-steel d. B Vent

4. B vent pipe that extends more than above the minimum termination heights in the manufacturer's chart must be protected in an unventilated enclosure or chase insulated to at least a R8. a. 2 feet b. 3 feet 5 feet d. 8 feet

Chapter 11 | Direct Vent Appliance Installation Guidelines 1. Which of the following is true about gas appliance venting system clearances? a. Direct vent clearances may be different for horizontal and vertical portions of the same venting system. b. Gas appliance vent clearances are established by the fuel gas codes. c. Clearances for a solid fuel factory-built chimney are reduced when the chimney is used to vent gas hearth appliances. d. Fiberglass insulation reduces clearances for gas appliance venting systems.

4. 36" b. 40" 44" d. This fireplace cannot be installed in this location.

Termination cap Air supply siet Restricted arva Dermination prohibited) 3. A direct vent fireplace is to be vented on an outside wall of a house in the United States with the termination located between an outside corner of the home and a window that can be opened. A round horizontal termination with an 8" outside diameter will be used. The edge of the window is 20" from the outside corner. Using the manufacturer's instructions below, what is the maximum Beu fireplace that can be installed? a. 8,000 Btu fireplace b. 20,000 Btu fireplace 50,000 Btu fireplace d. It is not possible to install a fireplace from this manufacturer in this location. Correct answer, a 4. What is the purpose of a direct vent restrictor plate? a. Decrease heat output b. Decrease effects of draft c. Make flame brighter d. Keep birds out of the vent

a. Air will be drawn into the vent gaps. b. Combustion byproducts will be pushed out. c. Backdrafts will be created, shutting down the appliance. d. The heating capacity of the appliance will be decreased.