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Guide for F32-N: F32 - National Standard Residential Mechanical - Class C

Quiz F32-N: F32 - National Standard Residential Mechanical - Class C

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Quiz

1/10
Combustion Air
A fuel-burning appliance installation has a total input rating of 120,000 Btu/h and uses two permanent openings communicating directly with the outdoors for combustion air. Using the prescriptive area method, what is the minimum net free area required for each opening?
Select the answer
1 correct answer
A.
15 square inches
B.
20 square inches
C.
30 square inches
D.
40 square inches

Quiz

2/10
Duct Systems
A duct is installed to supply combustion air from outdoors to a fuel-burning appliance. Which characteristic is required for the duct system?
Select the answer
1 correct answer
A.
It may be routed through a return-air plenum without sealing if it is short
B.
It must be sized to provide the required combustion-air quantity and protected against blockage
C.
It must discharge directly into the appliance vent connector
D.
It must be constructed only from combustible flexible tubing

Quiz

3/10
Chimneys and Vents
A listed Type B gas vent is installed near combustible construction. Which clearance is generally required unless the vent listing specifies otherwise?
Select the answer
1 correct answer
A.
1 inch
B.
2 inches
C.
4 inches
D.
6 inches

Quiz

4/10
General Requirements
When installing a listed fuel-burning appliance, which requirement takes precedence when the manufacturer's instructions are more restrictive than the general code provisions?
Select the answer
1 correct answer
A.
The manufacturer's instructions must be followed
B.
The installer may use either requirement
C.
Only local customs need to be followed
D.
The appliance may be installed using the instructions for a similar model

Quiz

5/10
Fuel Supply Systems
Before a newly installed fuel-gas piping system is placed in service, what must generally be done?
Select the answer
1 correct answer
A.
It must be pressure tested for leakage using an approved procedure
B.
It must be filled with water and left connected to the appliances
C.
It must be painted before any test is performed
D.
It must be connected to the appliance and tested only while operating

Quiz

6/10
Appliances and Equipment
A listed gas-fired appliance is being installed in a commercial building. The manufacturer’s installation instructions require a specific venting arrangement that is more restrictive than the general fuel-gas code provisions. Which requirement must be followed?
Select the answer
1 correct answer
A.
Only the general fuel-gas code provisions
B.
Only the contractor’s preferred installation method
C.
The manufacturer’s instructions and all applicable code requirements
D.
The instructions supplied with a similar appliance from another manufacturer

Quiz

7/10
Combustion Air
Which condition is most important when installing permanent combustion-air openings?
Select the answer
1 correct answer
A.
The openings must be equipped with closable dampers for winter operation
B.
The openings must be sized and located so they cannot be readily blocked or obstructed
C.
The openings must terminate only within 12 inches of the floor
D.
The openings must be connected to the appliance vent connector

Quiz

8/10
Duct Systems
When a combustion-air duct passes through a building, which installation practice best supports safe operation?
Select the answer
1 correct answer
A.
Provide a free, unobstructed passage and protect the duct from damage or closure
B.
Install a motorized damper that closes whenever the appliance operates
C.
Terminate the duct inside a closet containing combustible storage
D.
Reduce the duct size at the appliance to increase air velocity

Quiz

9/10
Chimneys and Vents
A single-wall metal vent connector runs horizontally from a gas appliance to a chimney. Which installation condition is generally required to promote proper draft and prevent condensate from flowing toward the appliance?
Select the answer
1 correct answer
A.
The connector should slope downward toward the appliance
B.
The connector should be installed level or sloped downward away from the chimney
C.
The connector should slope upward toward the chimney
D.
The connector should contain a trap filled with water

Quiz

10/10
General Requirements
Which statement best describes the required location of an appliance gas shutoff valve?
Select the answer
1 correct answer
A.
It must be located where it is accessible and within the permitted distance of the appliance
B.
It may be concealed behind a permanently installed wall finish
C.
It is required only at the gas meter
D.
It may be installed inside the vent connector if it is labeled
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  • Quiz name:F32-N: F32 - National Standard Residential Mechanical - Class C
  • Total number of questions:100
  • Number of questions for the test:50
  • Pass score:80%

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