The NFPA 58 test for leakage checks for propane leaks at the ___ portion of the piping only.
ANSWER
Exterior
You are required to perform a leak check on vapor distribution piping system immediately
after turning on the gas in a new gas system but not after a system has been restored after
interruption of service.
ANSWER
FALSE
Which of the following measures the amount of delivered pressure to the gas appliance with
no gas demand to ensure that the regulator will shut off the flow of propane when the appli-
ances are turned off?
ANSWER
Lock up test
When conducting a NFPA pressure test, what type of gas should never be used?
ANSWER
Propane
Which check or test pinpoint a leak found during another test in the vapor distribution sys-
tem?
ANSWER
Leak test
What test determines if the regulator and piping system are sized correctly to handle the btu
load of the system?
1
, ANSWER
Flow test
Regulator vents must be a minimum of ____ ft from any source of ignition, direct vent appli-
ance intake opening, and mechanical ventilation intakes.
ANSWER
5 feet
_____ appliances generate higher amounts of flue gases and must be vented to the outside.
Examples of this type of appliance include: central heating systems, water heaters, and some
space heaters.
ANSWER
VENTED
Identify the air that is needed at the appliance draft hood to mix with the flue gases to help
vent the flue products.
ANSWER
Dilution air
____________air pressure occurs in a room or structure that cannot supply a sufficient
amount of air to meet appliance combustion requirements
ANSWER
Negative
What does .40 air changes per hour (ACH) mean?
ANSWER
That 40% of the air space is changed every hour within a structure
Where do you install the test-block gauge in the system to conduct a leak check?
2
ANSWER
Exterior
You are required to perform a leak check on vapor distribution piping system immediately
after turning on the gas in a new gas system but not after a system has been restored after
interruption of service.
ANSWER
FALSE
Which of the following measures the amount of delivered pressure to the gas appliance with
no gas demand to ensure that the regulator will shut off the flow of propane when the appli-
ances are turned off?
ANSWER
Lock up test
When conducting a NFPA pressure test, what type of gas should never be used?
ANSWER
Propane
Which check or test pinpoint a leak found during another test in the vapor distribution sys-
tem?
ANSWER
Leak test
What test determines if the regulator and piping system are sized correctly to handle the btu
load of the system?
1
, ANSWER
Flow test
Regulator vents must be a minimum of ____ ft from any source of ignition, direct vent appli-
ance intake opening, and mechanical ventilation intakes.
ANSWER
5 feet
_____ appliances generate higher amounts of flue gases and must be vented to the outside.
Examples of this type of appliance include: central heating systems, water heaters, and some
space heaters.
ANSWER
VENTED
Identify the air that is needed at the appliance draft hood to mix with the flue gases to help
vent the flue products.
ANSWER
Dilution air
____________air pressure occurs in a room or structure that cannot supply a sufficient
amount of air to meet appliance combustion requirements
ANSWER
Negative
What does .40 air changes per hour (ACH) mean?
ANSWER
That 40% of the air space is changed every hour within a structure
Where do you install the test-block gauge in the system to conduct a leak check?
2
