Download NFI 200 Test Questions With Correct And Well Verified Answers 2025 Exam With 37 Questions and more Exams Safety and Fire Engineering in PDF only on Docsity!
NFI Test Questions With Correct And
Well Verified Answers 2025 Exam With
37 Questions And Answers
Which fuel type has a lower ignition temperature?
Propane ignites between 920-1,120 degrees Fahrenheit
while natural gas ignites at 1,150 degrees Fahrenheit
What is the significance of the differences in specific gravity between natural gas and propane?
Propane falls and collects in lower areas of appliance or room
while natural gas rises into the atmosphere
What added safety feature is on all unvented gas appliances that is not found on vented appliances?
Oxygen depletion system (ODS) that works with safety shutoff valve to stop fuel flow in event of low oxygen levels
Which is a chemical compound with a strong pungent odor that occurs in incomplete or interrupted combustion?
Aldehydes
Which of the following must be present in order for natural gas or propane to ignite?
Heat
According to the chart below, I have listed four configurations one being invalid. Do you understand this graph?
- 16" rise and 14" run
- 9' rise and 10' run
- 10'' rise and 14' run (invalid)
- 4' rise and 4' run
A 30,000 BTU appliance is installed at an elevation of 5,000 feet above sea level. The manufacturer requires a derating of 4% for each 1,000 feet above sea level for appliances installed higher than 2000 feet above sea level. What is the proper BTU input of the appliance for this installation?
24,000 BTUs
(4% for each 1,000 ( 5 one thousands)
- 4x5 = 20 or 20%
- 30,000 BTUs x .20 = 6,
Which of the following is the most likely of a yellow flame impingement on a log set creating soot?
Too much secondary air
Section 1: Chapter 2 (2.1)
Can you locate the pilot flame adjustment screw?
Section 4: Chapter 14 (14.4.1)
An IPI (intermittent pilot ignition) fireplace keeps sparking after burner ignition. The flame and sensor are properly positioned. Which of the listed components is a possible cause?
(gas control valve, control module, transformer, thermocouple)
Control module
Which of the following is necessary to run a thermostatically-operated convection blower? snap disk must reach min. requirements/speed control must be set to "high"/blower motor must be grounded/main burner must be left on
Snap disc
After a new fireplace runs for fifteen minutes, a click is heard and the circuit is heard and the circuit breaker feeding the fireplace pops open. The blower never comes on. based on this diagram of the blower wiring. What should be changed?
According to the installation manual installing a 20 inch vented gas log set into a masonry fireplace with a 20 foot chimney, the damper clamp needs to provide a minimum of how many square inches of opening?
On the diagram, which is a valid reason to decide which liner configuration to use? Answer is the missing
It is not any of these answers, chimney shares a flue with a gas furnace/smoke smell from the fireplace when not in use/fireplace has an existing outside air kit
When performing a fuel conversion on an appliance with a millivolt control valve it is necessary to BLANK & BLANK.
Attach a conversion label & adjust air shutter
Related statement to colinear venting system.
Exhaust pipes are sometimes larger in size than intake pipes
According to the instructions below, which of the following is the minimum correct area for the openings required for an enclosure to conceal a 20 pound propane cylinder that provides fuel to an outdoor fireplace listed to ANSI Z21.97?
Top opening 20 square in./ bottom opening 10 square in.
The appliance will burn above manufacturer specified rating
Which of the following actions is NOT a diagnostic check for a flame that is too blue in direct vent fireplace? check the air shutter setting/check any gasket for leaks/check millivoltage/check for cracks in the burner
Check any gasket fo leaks
Which of the following is the largest gas log set that can be installed in the factory-built fireplace with the dimensions below?
A30RXL-Z
When converting a direct vent gas fireplace from Natural gas to LP (propane) gas, the manufacturer's LP conversion kit will have a burner orifice with a hole that is BLANK then the orifice installed. The air shutter needs to be moved to a BLANK open position then was set by the manufacturer.
Smaller, more
Which of the following would you check first if a homeowner is complaining about a gas smell after a service call, during which the previous technician only checked the incoming gas pressure?
Inlet pressure tap
Which one of the following safety devices is used on IPI gas control systems in a direct vent gas fireplace?
Flame sensor
The pilot assembly contains the following components?
Flame sensor, pilot hood, and spark electrode
Which of the room dimensions will meet the minimum volume needed for a 35,000 BTU vented gas log set installed in a room that is 10'x12'x8' that has a fixed opening to an adjoining room? 6'x6'x8'/8'x10'x10'/6'x8'x8'/8'x8'x10'
8'x10'x10'
35,000/20 = 1750 (min volume)
10'x12'x8' = 960 (given room volume)
8'x10'x10' = 800 (answer to question)
960+800 = 1760 (meets min volume)
What location requires the main burner to be turned on to detect a gas leak?
Outlet pressure
When replacing a gas control valve, which of the following actions must be taken? replace burner/test for gas leaks/replace gas shutoff valve/clean sediment trap
Test for gas leaks
