Propane and Natural Gas Exam || Already Graded A+.
If an appliance cannot be converted to another fuel ex. propane to natural gas, it must be a ___
appliance correct answers "Dedicated" Appliance
The "10ft-2ft-3ft" rule is a reference to what? correct answers It means that chimneys must be 3ft
above the highest point of where it passes through, while still being 2ft higher than any portion
of roof within 10ft
How many feet must a type B or L vent terminate, at minimum, above the highest connected
appliance draft hood or flue collar? correct answers 5 feet
A gas vent (B or L) must terminate atleast ___ft above a forced air inlet located within ___ft
correct answers A gas vent (B or L) must terminate at least 3ft above a forced air inlet located
within 10ft
Two ways CSST or copper tubing can be installed inside hollow walls or partitions if it is
concealed? correct answers 1) Installed in single runs that are not rigidly secured
2) With steel striker barrier, minimum 16 gauge*, barrier extends 4"
*1.3mm or .0508" thick
What is the minimum pressure for a pressure test? correct answers 1 1/2 times max working
pressure, never less than 3 psi
What is the minimum duration for a pressure test? correct answers 10 minutes
What is the chemical formula of propane? correct answers C3H8
What is the specific gravity of liquid propane? correct answers .504
,What is the specific gravity of vapor propane? correct answers 1.50
What is the boiling point of propane? correct answers -44 F
What is the ignition temperature of propane? correct answers 920 F
What is the upper flammability limit of propane? correct answers 9.60%
What is the lower flammability limit of propane? correct answers 2.15%
What is the combustion ratio of propane? correct answers 24 to 1
How many BTU per cubic foot of propane vapor? correct answers 2488 btu
How many BTU per gallon of propane? correct answers 91,502 btu
What is the chemical formula of natural gas? correct answers CH4
What is the specific gravity of liquid natural gas? correct answers .30
What is the specific gravity of natural gas vapor? correct answers .60
What is the boiling point of natural gas? correct answers -260 F
What is the ignition temperature of natural gas? correct answers 1,150 F
,What is the upper limit of natural gas? correct answers 14%
What is the lower limit of natural gas? correct answers 4%
What is the ideal combustion ratio natural gas? correct answers 10 to 1
How many BTU per cubic foot of natural gas? correct answers 1000 btu
What is a furnace plenum? correct answers A chamber constructed of duct work attached to inlet
or outlet of furnace with one or more ducts connected to it
A drip (leg) is placed where and to collect what? correct answers A drip (leg) is placed at the
lowest point of system piping, in order to collect condensate (which can then be removed),
should not be placed where condensate could freeze
*Also at outlet of meter in some cases
Which device would turn on or off an appliance's gas supply in response to changes in pressure,
temperature, or liquid level? correct answers A limit control
Condensate separates from flue gas due to either a reduction of ___ or an increase in ___ correct
answers Condensate is created either through a reduction of temperature or an increase in
pressure
What is the difference between a type 1 and type 2 clothes dryer? correct answers A type 1 dryer
is for family living
A type 2 dryer is for business/public
, What is a BTU? correct answers British Thermal Unit, quantity of heat needed to raise 1 pound
of water 1 degree fahrenheit
What are the maximum temperature and pressure in a low pressure water boiler? correct answers
A low pressure water boiler has a maximum water temperature of 250 F and pressure of 160 psi
What are the maximum pressure in a low pressure steam boiler? correct answers 15 psi
Two characteristics of a Category IV Vented Appliance? correct answers 1) Positive Pressure
2) Excessive Condensate
Two characteristics of a Category III Vented Appliance? correct answers 1) Positive Pressure
2) AVOIDS Excessive Condensate
Two characteristics of a Category I Vented Appliance? correct answers 1) NON Positive Pressure
2) AVOIDS Excessive Condensate
What is the difference between accessible and readily accessible? correct answers Accessible
requires removal of panel WHILE readily accessible means no panel
Where must a sediment trap be installed, what is it made of, and what is the minimum length?
correct answers A sediment trap is located downstream of an appliance shut off,
it is made of a capped nipple off a tee,
If an appliance cannot be converted to another fuel ex. propane to natural gas, it must be a ___
appliance correct answers "Dedicated" Appliance
The "10ft-2ft-3ft" rule is a reference to what? correct answers It means that chimneys must be 3ft
above the highest point of where it passes through, while still being 2ft higher than any portion
of roof within 10ft
How many feet must a type B or L vent terminate, at minimum, above the highest connected
appliance draft hood or flue collar? correct answers 5 feet
A gas vent (B or L) must terminate atleast ___ft above a forced air inlet located within ___ft
correct answers A gas vent (B or L) must terminate at least 3ft above a forced air inlet located
within 10ft
Two ways CSST or copper tubing can be installed inside hollow walls or partitions if it is
concealed? correct answers 1) Installed in single runs that are not rigidly secured
2) With steel striker barrier, minimum 16 gauge*, barrier extends 4"
*1.3mm or .0508" thick
What is the minimum pressure for a pressure test? correct answers 1 1/2 times max working
pressure, never less than 3 psi
What is the minimum duration for a pressure test? correct answers 10 minutes
What is the chemical formula of propane? correct answers C3H8
What is the specific gravity of liquid propane? correct answers .504
,What is the specific gravity of vapor propane? correct answers 1.50
What is the boiling point of propane? correct answers -44 F
What is the ignition temperature of propane? correct answers 920 F
What is the upper flammability limit of propane? correct answers 9.60%
What is the lower flammability limit of propane? correct answers 2.15%
What is the combustion ratio of propane? correct answers 24 to 1
How many BTU per cubic foot of propane vapor? correct answers 2488 btu
How many BTU per gallon of propane? correct answers 91,502 btu
What is the chemical formula of natural gas? correct answers CH4
What is the specific gravity of liquid natural gas? correct answers .30
What is the specific gravity of natural gas vapor? correct answers .60
What is the boiling point of natural gas? correct answers -260 F
What is the ignition temperature of natural gas? correct answers 1,150 F
,What is the upper limit of natural gas? correct answers 14%
What is the lower limit of natural gas? correct answers 4%
What is the ideal combustion ratio natural gas? correct answers 10 to 1
How many BTU per cubic foot of natural gas? correct answers 1000 btu
What is a furnace plenum? correct answers A chamber constructed of duct work attached to inlet
or outlet of furnace with one or more ducts connected to it
A drip (leg) is placed where and to collect what? correct answers A drip (leg) is placed at the
lowest point of system piping, in order to collect condensate (which can then be removed),
should not be placed where condensate could freeze
*Also at outlet of meter in some cases
Which device would turn on or off an appliance's gas supply in response to changes in pressure,
temperature, or liquid level? correct answers A limit control
Condensate separates from flue gas due to either a reduction of ___ or an increase in ___ correct
answers Condensate is created either through a reduction of temperature or an increase in
pressure
What is the difference between a type 1 and type 2 clothes dryer? correct answers A type 1 dryer
is for family living
A type 2 dryer is for business/public
, What is a BTU? correct answers British Thermal Unit, quantity of heat needed to raise 1 pound
of water 1 degree fahrenheit
What are the maximum temperature and pressure in a low pressure water boiler? correct answers
A low pressure water boiler has a maximum water temperature of 250 F and pressure of 160 psi
What are the maximum pressure in a low pressure steam boiler? correct answers 15 psi
Two characteristics of a Category IV Vented Appliance? correct answers 1) Positive Pressure
2) Excessive Condensate
Two characteristics of a Category III Vented Appliance? correct answers 1) Positive Pressure
2) AVOIDS Excessive Condensate
Two characteristics of a Category I Vented Appliance? correct answers 1) NON Positive Pressure
2) AVOIDS Excessive Condensate
What is the difference between accessible and readily accessible? correct answers Accessible
requires removal of panel WHILE readily accessible means no panel
Where must a sediment trap be installed, what is it made of, and what is the minimum length?
correct answers A sediment trap is located downstream of an appliance shut off,
it is made of a capped nipple off a tee,
