Venting

Question 1

what requirements must be met when a power venter is used in place of a natural draft vent

a) the appliance must be located within ten feet of the chimney
b) the vent connector must be larger than 8” diameter
C) a device must be provided to prevent the flow of gas to the main burner in the event of exhaust system failure.
d) thew chimney must be of the prefabricated metal type

Answer 1

C) a device must be provided to prevent the flow of gas to the main burner in the event of exhaust system failure.

Question 2

An appliance vent shall terminate from any building mechanical air inlet by at least

A) 1 Foot
B) 3 feet
C) 6 feet
D) 10 feet

Answer 2

C) 6 feet

Question 3

what is the minimum clearance required from combustable material when a single wall vent connector is used to vent a warm air furnace?

A) 1”
B) 3”
C) 6”
D) 8”

Answer 3

C) 6”

Question 4

Single wall vent connectors____________

A) may pass through floors ceilings or roofs provided a metal thimble is used
B) may pass through floors ceilings or roofs provided the required minimum distance from combustable materials is maintained
C) may pass through floors ceilings or roofs provided they are insulated
D) shall not pass through floors ceilings or roofs

Answer 4

D) shall not pass through floors ceilings or roofs

Question 5

when is it necessary to use a sleeve at the point a connector enters the chimney when a vent connector is being used to connect a appliance to a masonry chimney

A) always
B) never
C) only when the vent connector is larger than 6” in diameter
D) only when the appliance is equipped with a draft hood

Answer 5

A) always

Question 6

when a vent connector used for an appliance having a draft hood must be located in or pass through a crawl space or other area that may be cold, what material must the entire vent connector be made of.

A) single wall aluminum
B) single wall stainless steel
C) type BW vent or type C vent
D) type B or type L vent

Answer 6

D) type B or type L vent

Question 7

what material must be used for the vent connector on a appliance without flue gas dilution air

A) 22B and SG aluminum
B) 24 GSG galvanized steel
C) 26 GSG Galvanized steel
D) 28 GSG Galvanized steel

Answer 7

B) 24 GSG galvanized steel

Question 8

when a gas fired appliance is vented in to a chimney flue serving an appliance which burns a solid fuel in a commercial or industrial application how should the vent from the gas lines be installed
A) Through a separate flue opening above the flue pipe connection from the other appliance
B) Through a separate flue opening below the flue pipe connector from the other appliance
C) through a job fabricated ranch fitting
D) located no more than 30” from the flue entrance of the chimney
D) located no more than 60” from the flue entrance of the chimney

Answer 8

A) Through a separate flue opening above the flue pipe connection from the other appliance

Question 9

what is the minimum size a single wall vent connector which could be used for a single natural draft appliance having an input of 1 million BTU where the vent connector is 20 feet and the chimney height is 50'
A) 8" 
B) 10"
C) 12" 
D) 16"

Answer 9

C) 12” as per the C tables

Question 10

what is the minimum internal area of the chimney in sq. inches for a single natural draft appliance having an input of 1 million BTUS but where the single wall vent connector is 20"  and the length is 50"
A)64" squared 
B)95" squared 
C) 132" squared 
D)264" squared

Answer 10

C) 132” squared