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Liquified petroleum (LP) is heavier than air and can cause suffocation if not handled properly.

A) True
B) False

Correct Answer

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In a conventional gas furnace, the hot flue gases are ____.


A) forced out a PVC vent with a blower
B) recycled through a secondary heat exchanger and then vented through a draft diverter
C) forced through a type B vent by a blower
D) vented by natural convection

E) All of the above
F) B) and D)

Correct Answer

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The proper color of a gas flame is ____.


A) sharp all blue
B) lazy all blue
C) blue with slight orange tips
D) lazy with yellow tips

E) B) and C)
F) All of the above

Correct Answer

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20 cubic feet of propane will produce how many Btu of heat?


A) 2,500
B) 50,000
C) 25000
D) 500,000

E) None of the above
F) B) and C)

Correct Answer

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Why do propane and butane gas furnaces require 100% shut off in the event of pilot outage?

Correct Answer

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Propane and butane g...

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The heat content of one gallon of No. 2 fuel oil is _________________________.

Correct Answer

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What is the difference between a yellow gas flame and an orange gas flame?

Correct Answer

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A yellow flame represents an air-starved flame-carbon monoxide is being produced! An orange flame represents the burning of dust-not dangerous.

Three products of complete combustion of natural and LP gas are _________________________, ________________________, and _________________________.

Correct Answer

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carbon dio...

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The dangerous by-product of poor combustion of gas is ______________________________.

Correct Answer

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In the USA, natural gas suppliers supply gas with a heat content of about 1,050 Btu/cu. ft.

A) True
B) False

Correct Answer

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Why is "inches of water column" used to measure gas pressure instead of psig?

Correct Answer

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"Inches of water column" is a smaller scale and will give more accurate measurements.

The flame in a gas fired furnace is burning with heavy yellow tips. What is the problem?

Correct Answer

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There is not enough ...

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A gas flame will carry electrical energy.

A) True
B) False

Correct Answer

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True

If flue gases are not vented properly, carbon monoxide poisoning could result.

A) True
B) False

Correct Answer

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