Cetp 4.3 Full Exam Practice Pack | 2025 Latest
Questions with Verified Solutions
A customer wants to install a 10,000 btu unvented room heater in their bathroom. Would you
advice them to do so? - No
What type of appliances are constructed so that all air for combustion is derived directly from
the outdoors through one duct or pipe, and all flue gases are discharged to the outdoors
through another duct or pipe. - Direct vent
Residential propane appliances categories - Cat 1, 2, 3, and 4
Name plates are required when installing a ____ appliance - Listed
Unlisted room heaters are prohibited for use in bathrooms if the btu rating is ____ or less
according to code - 6000 btu's
Unlisted, gas, food service counter appliances must be at least ____ from any combustible
material - 12 inches
Name two factors you must consider when selecting an appliance for a given application -
Venting and combustion air
_____ is a measure of thermal resistance used in the building and construction industry -
R value
What method of calculating needed combustion air is used when the air infiltration rate is
unknown - Standard calculation method
When determining the air infiltration rate using the KAIR method, the following must be
determined - Calculate ACH, size combustion air openings, determine building
parameters
Which method is used when supplying additional air to a structure by creating two permanent
openings in a single room, one on top and one on bottom, each 12 inches from the ceiling or
floor - Two-openings method
The three sources for supplying additional air to a structure that is found to have an inadequate
air supply are indoor air, outdoor air, and ____ - Combination indoor and outdoor air
The three types of venting systems are natural draft, direct, and ____ draft venting -
Mechanical
, The two basic ways natural draft systems vent - Through lines masonry chimneys and
metallic gas venting materials
In a sealed combustion direct vent appliance - Combustion air is separate from where the
appliance is located, combustion air is obtained from and discharged to the outdoors
A typical natural draft venting system has several components, some of which include -
Draft hood
The common type of vent material used in a natural draft venting system, made with double
walls, forms a continuous flue passageway from a gas appliance to a vent termination and heats
up quickly - Type B-vent
A single-wall venting cannot be used under which circumstances - In an attic, in a wall or
floor, or outside in regions where the 99% winter design is below 32 degrees Fahrenheit
What code book is referred to when sizing venting - NFPA 54
NFPA 54 venting tables assume the lack of ___ - Obstructions
A vent connector must be routed to a vent using the ____ possible route - Shortest
When sizing multiple category 1 appliances to an existing venting system, what must be
considered - Are all appliances designed for use with a common venting system, does the
existing venting system have the capacity to handle more appliances, does the existing system
have the proper materials needed for the added appliances
When installing a direct vent system, what are some of the proper terminations - Vent
cap and roof jack
What type of draft venting system uses a fan at the appliance combustion chamber inlet or
outlet or sidewall termination - Mechanical
An ____ between a mechanical draft system and an appliance gas control valve will stop the
flow of gas to the main burner when the draft system is not operating - Electrical
interlock
In order to determine the maximum Btu/hr load that will be placed on a piping system, you
must determine - The total and estimated future demand of a system
To select the appropriate regulator for a given piping system, you must consider ___ -
Pipe size
Questions with Verified Solutions
A customer wants to install a 10,000 btu unvented room heater in their bathroom. Would you
advice them to do so? - No
What type of appliances are constructed so that all air for combustion is derived directly from
the outdoors through one duct or pipe, and all flue gases are discharged to the outdoors
through another duct or pipe. - Direct vent
Residential propane appliances categories - Cat 1, 2, 3, and 4
Name plates are required when installing a ____ appliance - Listed
Unlisted room heaters are prohibited for use in bathrooms if the btu rating is ____ or less
according to code - 6000 btu's
Unlisted, gas, food service counter appliances must be at least ____ from any combustible
material - 12 inches
Name two factors you must consider when selecting an appliance for a given application -
Venting and combustion air
_____ is a measure of thermal resistance used in the building and construction industry -
R value
What method of calculating needed combustion air is used when the air infiltration rate is
unknown - Standard calculation method
When determining the air infiltration rate using the KAIR method, the following must be
determined - Calculate ACH, size combustion air openings, determine building
parameters
Which method is used when supplying additional air to a structure by creating two permanent
openings in a single room, one on top and one on bottom, each 12 inches from the ceiling or
floor - Two-openings method
The three sources for supplying additional air to a structure that is found to have an inadequate
air supply are indoor air, outdoor air, and ____ - Combination indoor and outdoor air
The three types of venting systems are natural draft, direct, and ____ draft venting -
Mechanical
, The two basic ways natural draft systems vent - Through lines masonry chimneys and
metallic gas venting materials
In a sealed combustion direct vent appliance - Combustion air is separate from where the
appliance is located, combustion air is obtained from and discharged to the outdoors
A typical natural draft venting system has several components, some of which include -
Draft hood
The common type of vent material used in a natural draft venting system, made with double
walls, forms a continuous flue passageway from a gas appliance to a vent termination and heats
up quickly - Type B-vent
A single-wall venting cannot be used under which circumstances - In an attic, in a wall or
floor, or outside in regions where the 99% winter design is below 32 degrees Fahrenheit
What code book is referred to when sizing venting - NFPA 54
NFPA 54 venting tables assume the lack of ___ - Obstructions
A vent connector must be routed to a vent using the ____ possible route - Shortest
When sizing multiple category 1 appliances to an existing venting system, what must be
considered - Are all appliances designed for use with a common venting system, does the
existing venting system have the capacity to handle more appliances, does the existing system
have the proper materials needed for the added appliances
When installing a direct vent system, what are some of the proper terminations - Vent
cap and roof jack
What type of draft venting system uses a fan at the appliance combustion chamber inlet or
outlet or sidewall termination - Mechanical
An ____ between a mechanical draft system and an appliance gas control valve will stop the
flow of gas to the main burner when the draft system is not operating - Electrical
interlock
In order to determine the maximum Btu/hr load that will be placed on a piping system, you
must determine - The total and estimated future demand of a system
To select the appropriate regulator for a given piping system, you must consider ___ -
Pipe size
