38. Auxiliary and secondary drain pan piping shall be a minimum of ____________________ nominal pipe size.

A. 1/2-inch (12.7 mm)

B. 1-inch (24.5 mm)

C. 3/4-inch (19 mm)

D. 1/4-inch (6.3 mm)

39. Where required, draft regulators shall be installed in the ______________________________ so that no difference in pressure will exist between the air at the regulator and the combustion air supply.

A. a different room or enclosure from the appliance

B. any room in the same building as the appliance

C. same room or enclosure as the appliance

D. first 12 inches of the vent pipe

40. Mechanical systems, both existing and new, and parts thereof shall be maintained in proper operating condition in accordance with the ______________________ and in a safe and sanitary condition.

A. NFPA

B. master installers instructions

C. rules of common sense

D. original design

41. In floor heating systems, Polypropylene pipe and tubing joints that are embedded concrete or gypsum shall be installed with ______________________________.

A. socket-type heat-fused polypropylene fittings

B. polybutylene pipe cement

C. compression connectors

D. solvent cement joints

42. An opening in the foundation not less than ___________________________, or a trap door not less than _______________________________ shall be provided for access to a floor furnace.

A. 22 inches by 30 inches (559 mm by 762 mm), 18 inches by 24 inches (457mm by 610 mm)

B. 18 inches by 24 inches (457mm by 610 mm), 22 inches by 30 inches (559 mm by 762 mm)

C. 18 inches by 24 inches (457mm by 610 mm), 18 inches by 24 inches (457mm by 610 mm)

D. 22 inches by 30 inches (559 mm by 762 mm), 22 inches by 30 inches (559 mm by 762 mm)

43. For fuel gas heating appliances, when combining spaces on the same story for purposes of combustion air requirements , each opening shall have a minimum free area of _______ square inch per 1,000 Btu/h of the total input rating of all appliances in the space, but not less than _______ square inches.

A. 2, 200

B. 3, 300

C. 1, 100

D. 10, 1000

44. Connectors, or thimbles entering a masonry chimney, shall _______________________.

A. be installed with a 1/2 in air gap on all sides.

B. be completely free of contact with the masonry except at the flue

C. be encased in thermal foam insulation

D. be firmly cemented into the masonry

45. Natural draft gas vents serving wall furnaces shall terminate at an elevation at least _____________ above the bottom of the furnace.

A. 4 feet (1219 mm)

B. 5 feet (1524 mm)

C. 8 feet (2438 mm)

D. 12 feet (3658 mm)

46. Which of the following may be required to appear on an appliance label.

A. Electrical rating in volts, amperes and motor phase, identification of individual electrical components in volts, amperes or watts and motor phase; and in Btu/h (W) output and required clearances.

B. Hourly rating in Btu/h (W), minimum hourly rating for units having step or automatic modulating controls, type of fuel, type of refrigerant, cooling capacity in Btu/h (W) and required clearances.

C. Hourly rating in Btu/h (W), type of fuel approved for use with the appliance and required clearances.

D. Name and trademark of the manufacturer, the model number or equivalent, the electric rating in volts, amperes and phase; Btu/h (W) output rating, individual marking for each electrical component in amperes or watts, volts and phase, required clearances from combustibles and a seal indicating approval of the appliance by an approved agency.

E. any or all of the above

47. The auxiliary pan drain shall discharge to a ___________________ to alert occupants in the event of a stoppage of the primary drain.

A. clear sewer disposal pipe hooked to the sewer system

B. floor drain

C. utility receptacle

D. conspicuous point of disposal

48. An attic passageway to access an appliance shall have continuous solid flooring, in accordance with Chapter 5, not less than ____________________ wide. Exceptions ignored.

A. 20 inches (508 mm)

B. 24 inches (610 mm)

C. 30 inches (762 mm)

D. 36 inches (914 mm)