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? - CORRECT ANS
Direct Vent
Name plates are required when installing a _____ ap...
CETP Review Exam 2023 Questions
and Answers with complete solution
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? - CORRECT ANS
Direct Vent
Name plates are required when installing a _____ appliance. - CORRECT ANS
Listed
Name two factors you must consider when selecting an appliance for a given
application - CORRECT ANS Venting & combustion air
What method for calculating needed combustion air is used when the air infiltration is
unknown? - CORRECT ANS Standard calculation method
When determining the air infiltration rate using KAIR method, the following must be
determined:
a) Calculate ACH For building
b) Size combustion air openings
c) Determine building parameters
d) all of the above - CORRECT ANS D - all of the above
Which method is used when supplying additional air to a structure by creating two
permanent openings in a single room, one on top an done on bottom, each 12" from
the ceiling or floor? - CORRECT ANS 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 _______ - CORRECT ANS
Combination indoor and outdoor air
The three types of venting systems are natural draft venting, direct venting and
________ draft venting - CORRECT ANS Mechanical
In a sealed combustion direct vent appliance:
a) combustion air is separate from where the appliance is located
b) combustion air is obtained from and discharged to the outdoors
c) venting is not required
d) both a and b - CORRECT ANS D - both a & b
A typical natural draft venting system has several components, some of which
include:
a) draft hood
b) exhaust fan
c) electrical interlock
d) all of the above - CORRECT ANS a - draft hood
this common type of vent material used in a natural draft venting system is made of
double-wall construction, forms a continuous flue passageway from a gas appliance
to a vent termination and heats up quickly - CORRECT ANS Type B-vent
A single-wall venting cannot be used under which of the following circumstances:
a) outdoors in regions where the 99% winter design temperature is below 32F
b) In an attic
c) In a wall or floor
c) all of the above - CORRECT ANS d-all of the above
A vent connector must be routed to a vent using the ______ possible route. -
CORRECT ANS Shortest
, CETP Review Exam 2023 Questions
and Answers with complete solution
When sizing multiple Category I appliances to an existing venting system, which of
the following must be considered prior to installation:
a) whether all appliances are designed for use with a common venting system
b) whether the existing venting system has the capacity to handle additional
appliances
c) whether the existing system has the proper venting materials needed for the
added appliances
d) all of the above - CORRECT ANS d - all of the above
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 - CORRECT ANS Electrical interlock
To select the appropriate regulator for a given piping system, you must consider
________________ - CORRECT ANS Pipe Size
When venting a line regulator, all of the following conditions should exist EXCEPT:
a) vent line must be at least the same size as the regulator vent connection
b) no vent line is required when using a regulator incorporating a vent limiter
c) regulator vents must terminate at least 3 ft from a source of ignition
d) you may vent a line regulator to an appliance flue or exhaust system -
CORRECT ANS D
Which of the following pipes will supply the least amount of BTU/hr?
a) smaller pipe operating at a higher pressure
b) a larger pipe operating at a lower pressure
c) a larger pipe at a higher pressure
d) a smaller pipe operating at a lower pressure - CORRECT ANS D
If you must install gas piping in a concealed location, you may not use which of the
following connecting materials?
a) threaded tees
b) tubing fittings
c) threaded couplings
d) threaded elbows - CORRECT ANS B - tubing fittings
The maximum design operating pressure for piping systems located inside buildings
cannot exceed ____________ except in a limited number of circumstances. -
CORRECT ANS 5 psi
What are some of the variables you will need to know to determine the appropriate
pipe size for given system using the longest length method? - CORRECT ANS
Gas demand and pipe length
The "branch length method" is used to size which of the following pipes:
a) Copper tubing
b) CSST
c) Steel
d) all of the above - CORRECT ANS d - all of the above
The hybrid pressure method is typically used in 2-psi vapor distribution systems or
other __________ gas pressure piping systems - CORRECT ANS Higher
Which type of appliance is designed to work with either propane or natural gas? -
CORRECT ANS Convertible
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