Certification Exam

Question 1

NFPA 54 is what code?

Answer 1

National fuel gas code

Question 2

What is the purpose of a barometric damper

Answer 2

Allows air directly into venting system; and reduces draft through appliance

Question 3

What does rise & run mean?

Answer 3

Length of connector should not exceed 75% of venting system height above connector

Question 4

What is the fireplace minimum clearance for side walls and rear walls?

Answer 4

2”; 4”

Question 5

Combustibles such as trim or mantels shall NOT be placed within ____” of fireplace opening(NFPA211)

Answer 5

6”

Question 6

Combustibles above and projecting more than 1 1/2” from opening, shall NOT be within ____” of fireplace opening (NFPA211)

Answer 6

12”

Question 7

If fireplace opening is less than 6 sq. ft. the hearth must extend to ___” to each side and ___” in front of the fireplace opening. (864 sqr. inches)

Answer 7

8”; 16”

Question 8

How do you find the square feet of a square?

Answer 8

Length x Width

Question 9

How do you find the square feet of a circle?

Answer 9

Radius x Radius x 3.14

Question 10

What is the purpose of a catalytic?

Answer 10

Created to increase the combustion efficiency of. a wood heating system by lowering ignition temps of flue gases pushing through it

Question 11

A B-vent must be vented vertically and uses ____ to provide oxygen to a fire.

Answer 11

Fresh air from inside the home

Question 12

A direct vent has a sealed glass front and pulls all its _____. Direct vents can be vented vertically or horizontally through exterior wall. Direct vents are completely sealed.

Answer 12

air from outside the home

Question 13

36” of clearance is required from stove to an unprotected wall for a freestanding stove. True or False

Answer 13

True

Question 14

How much clearance do you need from the venting system to the wall behind a wood burning stove?

Answer 14

18”

Question 15

(Floor Protection) How much clearance from the wood stove to the side of the hearth and the front of the hearth do you need?

Answer 15

18”

Question 16

What is uL103/uL103HT?

Answer 16

Standard by underwriters laboratories for factory built chimneys for residential type heating appliances (1700* test ul103/2100* test ul103HT)

Question 17

UL127

Answer 17

standard by Underwriters lab for factory built fireplaces including fire chamber chimney, roof assembly, etc.

Question 18

UL641

Answer 18

Standard by underwriters lab for low temp venting systems (Oil, gas, pellet)

Question 19

ASTM

Answer 19

American Society for testing and materials, producing standards for fireclay, building brick, refractory mortars, clay flue lining

Question 20

ASHRE

Answer 20

American society for heating

Question 21

AHJ

Answer 21

The authority having jurisdiction- sets requirements based on its concept of having a safe instell

Question 21

AHJ

Answer 21

The authority having jurisdiction- sets requirements based on its concept of having a safe instell

Question 22

Standard of care

Answer 22

Legal term; Do your best, don’t leave things out when talking to clients

Question 23

Combustion (3 words)

Answer 23

Heat, Fuel, Oxygen

Question 24

Combustion process?

Answer 24

Kindling

Question 25

Heat transfer?

Answer 25

Radiation, Convection, conduction

Question 26

3/2/10 rule

Answer 26

36" out of the roof, 24" higher than anything 10 feet away

Question 27

You have a 7/17 pitch ridge, isn't 10 feet away, and its taller. How tall should the chimney be?

Answer 27

70"+24"= 94"

Question 28

Type BW Vent

Answer 28

Double wall w stainless inner wall. Used to vent low temp oil appliances.

Question 29

Whats the clearance for unlisted solid fuel burning appliance

Answer 29

36"

Question 30

3 basic components of a masonry FP?

Answer 30

The base assembly, firebox assembly, smoke chamber assembly

Question 31

What is combustion efficiency?

Answer 31

The percentage of potential energy converted to useful heat in the fire chamber

Question 32

What 3 factors affect combustion efficiency?

Answer 32

Time, temp, turbulence

Question 33

Absolute combustion produces?

Answer 33

Carbon dioxide, water, and heat

Question 34

_____ is a chemical alteration of fuel as a result of the application of heat

Answer 34

Pyrolisis

Question 35

Charcoal remains after the ___ & ____ heave been driven from fuel. Charcoal is mainly____.

Answer 35

Tars & Gases; Carbon

Question 36

For complete combustion of solid fuel, the temp in combustion chamber must reach ___ degrees

Answer 36

1100

Question 37

Temperatures during a chimney fire may reach ____ degrees.

Answer 37

2000

Question 38

Residential type chimneys are intended for appliances with a max continuous flue gas temp up to ___ degrees.

Answer 38

1000

Question 39

____ slows passage of smoke to help achieve complete combustion by increasing turbulence. Bent __ inhibit flow.

Answer 39

Baffles, baffles

Question 40

Furnace Parts

Answer 40

Heat exchanger, combustion chamber, blower, fan switch, limit switch, draft hood or barometric damper.

Question 41

Ductwork has a ____ & ___ side. Both sides have a ___ enclosure, which serves as the gathering point for distribution of air in ducting system. Furnace blower on return side.

Answer 41

Supply; Return; Plenum

Question 42

What does a limit switch do?

Answer 42

helps the system not overheat

Question 43

Barometric draft regulator does what

Answer 43

prevents excess draft

Question 44

Fan assist does what?

Answer 44

On gas furnace- no draft hood, it uses fan to control airflow

Question 45

_____ Has galvanize steel, mild steel, snap-lock, hammered seam, welded seam

Answer 45

Connector pipe

Question 46

____" thick foundation for masonry ___" for walls

Answer 46

12"; 6"

Question 47

UL 1777

Answer 47

Listed liner systems